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1	Author	Mit Unterschiedlich, Koordinierten Zinkionen, Joachim Pickardt, Gill-Taik Gong, Sabine Wischnack, Christina Steinkopff	Requires cookie*
	Title	Kristallstruktur zweier Zinkthiocyanat-Hexamethylentetramin-Addukte, Zn(SCN)2» (Q H ^N,), und {Zn(SCN)2 C6HnN4 2H 20}(SCN)2-(C6H 12N4)2, and {Zn(SCN)2-C6H 12N4-2H 20}", with Differently Coordinated Zinc Ions
	Abstract	of the adducts Zn(SCN),-(C6H12N4)2 (1), and {Zn(SCN)2-C6H 12N4-2H20}" (2) were obtained by crystallization from aqueous solutions containing hexamethylenetetrami ne, potassium thiocyanate and zinc nitrate or zinc sulfate, resp., under identical conditions, as two totally different products. 1 crystallizes orthorhombically, space group P nmm, Z -2, a -622.4(5), b -1152.3(7), c = 1394.0(9) pm; 2 is monoclinic, space group C2/c, a = 984.4(3), b = 1217.0(5), c = 1257.4(6) pm, andß = 111.69(5)°. The crystal structure of 1 contains discrete molecules of the complex, in which the zinc ion is tetrahedrally coordinated by two NCS li gands, and two hexamethylenetetramine molecules, which act as monodentate ligands. In 2 however, the zinc ions are octahedrally coordinated. A "supramolecular" structure is form ed: The hexamethylenetetramine molecules act as bridging bidentate ligands and connect [Zn(H20) 2(NCS)2] units forming zig-zag chains. Adjacent chains are interconnected via hydrogen bonds. The formation of the two compounds with different coordination may be due to the fact, that the educts Zn(N03)2-4H20 and ZnS04-7H20 contain Zn(H20) 4 and Zn(H20) 6 moieties, resp., and that these species are retained in solution.
	Reference	Z. Naturforsch. 49b, 325—329 (1994); eingegangen am 24. August 1993
	Published	1994
	Keywords	Hexamethylenetetramine Complexes, Zinc Thiocyanate Adducts, Crystal Structure Crystals
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0325.pdf
	Identifier	ZNB-1994-49b-0325
	Volume	49

2	Author	Enno Lork, Ulrich Behrens, G. Ünter Steinke, Rüdiger Mews	Requires cookie*
	Title	Die Kristallstruktur von trans-l,3?5-Trichloro-l,3>5-trioxo
	Abstract	1 A6, 3 A6, 5 A6,2,4,6-trithiatriazin (/?-Sulfanurchlorid) The Crystal Structure o f /raws-1,3,5-Trichloro-1,3,5-trioxo-1 X6, 3/i6, 516, 2,4,6-trithiatriazine (/?-Sulfanuric Chloride) The crystal structure o f /?-(N S(0)C l)3 is reported.
	Reference	Z. Naturforsch. 49b, 437 (1994); eingegangen am 22. November 1993
	Published	1994
	Keywords	Trichlorotrioxotrithiatriazines, Sulfanuric Chlorides, Crystal Structure
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0437.pdf
	Identifier	ZNB-1994-49b-0437
	Volume	49

3	Author	Müller-Buschbaum	Requires cookie*
	Title	Zur Kristallchemie der Oxoplatinate. Eine neue Phase der Zusammensetzung Sr4_j.Naj.PtO6 (jt = 0,33)
	Abstract	On the Crystal Chemistry of Oxoplatinates. A New Phase of the Composition Sr4 _xN avP t0 6 (x -0.33) G. Tams, Hk. Single crystals of Sr3 67Na() 33PtO fi were prepared by heating oxide mixtures in closed silver tubes and investigated by X-ray single crystal techniques. It crystallizes with trigonal symme try, space group Dfd-R 3 c (Nr. 167) with a = 9.6617, c = 11.6580 Ä, Z = 6. Sr367Na()33P t0 6 belongs to the Sr4P t0 6 type and is isotypic to K4CdCl6. One point position characterized by a trigonal prismatic O 2-coordination is occupied by N a+ and Sr2+ statistically. The crystal structure is discussed with respect to the related compounds Sr3C u P t0 6 and Ca3 5Cu() 5P t0 6.
	Reference	Z. Naturforsch. 49b, 581—584 (1994); eingegangen am 12. Januar 1994
	Published	1994
	Keywords	Strontium, Sodium, Platinum Oxide Crystal Structure
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0581.pdf
	Identifier	ZNB-1994-49b-0581
	Volume	49

4	Author	Siegfried Pohl, Michael Peters, Detlev Haase, Wolfgang Saak	Requires cookie*
	Title	Bildung von Iodoantimonaten und -bismutaten. Kristallstrukturen von (PhCH2NEt3)4 [Sb6l 2 2 L (PhCH2NEt3)4 [Bi6l 2 2 ] und (Ph4P)3[Bi5I18] Form ation of Iodoantim onates and Bismutates. Crystal Structures of (PhCH 2N E t3)4[Sb6I22], (PhC H 2N Et3)4[Bi6l22] and (Ph4P)3[Bi5I 18]
	Abstract	The formation and the crystal structures of the title compounds are reported. (PhCH2N E t3)4[Sb6l 22] and (PhCH 2N E t3)4[Bi6l 22] are isotypic and contain a novel [E6I22]4~ anion (E = Sb, Bi). The anion of (Ph4P)3[Bi5I18] consists of a linear chain of five face-sharing [B il6] octahedra.
	Reference	Z. Naturforsch. 49b, 741—7 (1994); eingegangen am 27. Januar 1994
	Published	1994
	Keywords	Iodoantimonates, Iodobismutates, Crystal Structure
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0741.pdf
	Identifier	ZNB-1994-49b-0741
	Volume	49

5	Author	Viktor Keimes, Albrecht Mewis	Requires cookie*
	Title	MgNi2P -das erste ternäre Phosphid mit geordneter Fe3C-Struktur MgNi2P -The First Ternary Phosphide with an O rdered Fe3C Type Structure
	Abstract	MgNi2P was prepared by heating a mixture of the elements and investigated by means of single crystal X-ray methods. The compound crystallizes in an ordered Fe3C-type structure
	Reference	Z. Naturforsch. 49b, 1071—1073 (1994); eingegangen am 00. 00. 0000
	Published	1994
	Keywords	Ternary Nickelphosphide, Magnesium, Crystal Structure
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	Identifier	ZNB-1994-49b-1071
	Volume	49

6	Author	Holger Szillat, Hanskarl Müller-Buschbaum	Requires cookie*
	Title	Synthesis and Crystal Structure of Cuq^sH oj 25w 2o 8
	Abstract	Single crystals of Cu(l.2sHO\|.2sW20 8 were prepared by recrystallization from melts and investigated by X-ray diffractometer technique. Cuo^sHoj 25W 2Os crystallizes with m ono clinic symmetry, space group C2/c, o -19.123, b -5.613, c = 11.479 Ä , ß = 111.44°. Z = 8. It represents a new structure type characterized by W40 18 groups and Cu+/H o3+ at one point position in statistical distribution. Cu+/H o3+ show an octahedral coordination. A nother point position is occupied by Ho3+ with C. N. = 7.
	Reference	Z. Naturforsch. 49b, 1145—1149 (1994); eingegangen am 25. März 1994
	Published	1994
	Keywords	Crystal Structure Copper Holmium, Tungsten, Oxide
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	Identifier	ZNB-1994-49b-1145
	Volume	49

7	Author	Jörn Müller, PetraEscarpa Gaede, Ke Qiao	Requires cookie*
	Title	^-Olefin-Iridium-Komplexe, XXII [1] C -H -Aktivierung von aromatischen und aliphatischen Solvensmolekülen RH bei der Reaktion von [CpIrCI2 ] 2 mit Butadienmagnesium unter Bildung von [CpIr(773-C4H 7)R] sowie Kristallstruktur von [CpIr(i/3-C4H 7)C6H 5] jr-Olefin Iridium Complexes, XXII [1] C -H Activation of Aromatic and Aliphatic Solvent Molecules RH in the Reaction of [CpIrCl2 ] 2 with Butadienemagnesium with Formation of [CpIr(?;3 -C4 H 7 )R], and Crystal Structure of [CpIr(773 -C4 H 7 )C6 H 5] Activation of C -H , (l-Methylallyl)(pentamethylcyclopentadienyl)iridium-a-organyl Com plexes
	Abstract	Reactions of [CpIrCl2]2 (Cp = ^3-C5M e5) with [MgC4H6 -2 THF]" at low temperature give [CpIr(^4-C4H6)] together with [CpIr(/73-C4H 7)R] compounds, the latter being formed via C -H activation of solvent molecules RH (RH = benzene, toluene, anisole, thiophene, furane, N-methylpyrrole, pentane, cyclohexane. THF). In the case of pyrrole, C -N -activation occurs. The ratio of syn and anti isomers of the 1-methylallyl com plexes as well as the sites o f C -H activation of RH were investigated by NM R spectrometry. An enantiomorphous crystal of [CpIr(773-C4H7)C6Hs] was characterized by X-ray diffraction analysis which reveals trigonal planar coordination at the Ir atom and an exo, syn conformation o f the 1-methylallyl ligand. A mechanism of the reaction which involves 16-electron intermediates is discussed. The corresponding system [CpRhCl2]2/butadienemagnesium/RH gives only [Cp*Rh(>/4-C4H6)], and no C -H activation is observed.
	Reference	Z. Naturforsch. 49b, 1645—1653 (1994)
	Published	1994
	Keywords	Synthesis, NMR Spectra, Crystal Structure
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	Identifier	ZNB-1994-49b-1645
	Volume	49

8	Author	Z. Naturforsch	Requires cookie*
	Title	Die isoelektronischen Molekülkomplexe TiCl3(NPPh3) und TiCl3(OSiPh3)
	Abstract	The Isoelectronic M olecular C om plexes TiC l3(N P P h 3) and T iC l3(O SiPh3) Thilo R übenstahl, D o ro th ea W olff von G udenberg, F ra n k W eller, K u rt D ehnicke* TiCl3(NPPh3) and TiCl3(OSiPh3) have been prepared from titanium tetrachloride and Me3SiNPPh3 and HOSiPh3, respectively. Both complexes were characterized by IR spectrosco py and by crystal structure determmations. TiCl3(N PPhj): Space group R3, Z = 6, structure analysis with 959 observed unique reflec tions, R = 0.039. Lattice dimensions at -6 8 °C: a = b = 1370.5(7), c = 1845.9(9) pm. TiCl}(OSiPh3): Space group P2,/c, Z = 8, structure analysis with 4549 observed unique re flections, R = 0.049. Lattice dimensions at 19 °C: a = 2127.7(2), b = 947.2(1), c = 2136.8(1) pm, ß = 105.081(5)°. Both complexes form monomeric molecules in which the titanium atom is tetrahedrally coordinated by three chlorine atoms, the nitrogen atom of the phosphorone iminato ligand and the oxygen atom of the silyloxy group, respectively. The bond lengths TiN of 171.9(4) pm and TiO of 171.0(3) (in average) correspond to double bonds.
	Reference	(Z. Naturforsch. 49b, 15—20 [1994]; eingegangen am 7. September 1993)
	Published	1994
	Keywords	Monomerie Titanium Complexes, Synthesis, Crystal Structure
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0015.pdf
	Identifier	ZNB-1994-49b-0015
	Volume	49

9	Author	Z. Naturforsch	Requires cookie*
	Title	Gold-Alkalimetallsysteme, III. Hochdrucksynthese und Kristallstruktur von Rb3Au7 [1]
	Abstract	G old-A lkali M etal-System s, III. H igh Pressure Synthesis and C rystal S tructure o f R b 3A u 7 [1] K laus-Jürgen Range*, G eorg H. G rosch, F ran z R au, U lrich K lem ent The intermetallic compound Rb3Au7 could be synthesized from the elements at 4 kbar, 700 °C in a modified Belt-type apparatus. The structure (Cmmm; a = 5.579(1), b = 13.267(5), c = 7.265(2) Ä; Z = 2; R = 0.035, Rw = 0,031) comprises three crystallographically independ ent Au atoms, arranged in layers along the c-axis. The shortest interatomic distances are A u -A u = 2.633Ä, A u -R b = 3.438Ä and R b -R b = 3.622Ä. Im System R ubidium -G old [2,3] sind bisher n u r die V erbindungen R b A u [4] und R b A u 5 [5,6] ein deutig nachgewiesen und strukturell c h a ra k te ri siert w orden. Die Existenz von R b A u 2 [2,3,7] ko n n te bisher nicht verifiziert werden. D ie h o m o logen V erbindungen N aA u 2 [8] und K A u 2 [9] sind Lavesphasen und kristallisieren im kubischen M gC u2-Typ bzw. im hexagonalen M g Z n 2-Typ. Bei unseren V ersuchen zur H ochdrucksynthese einer L avesphase R b A u 2 fanden wir nun eine bisher im System R b -A u unbekannte Phase d er Z u sam m ensetzung R b 3A u 7, über die im folgenden berich tet w ird.
	Reference	(Z. Naturforsch. 49b, 27—30 [1994]; eingegangen am 6. Juli 1993)
	Published	1994
	Keywords	Trirubidium Heptagold, High Pressure Synthesis, Crystal Structure
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0027.pdf
	Identifier	ZNB-1994-49b-0027
	Volume	49

10	Author	Thom As Schleid, Falk Lissner	Requires cookie*
	Title	Oxidsulfidchloride der Lanthanide vom Typ M 4OS4Cl2 (M = L a-N d ) M 4OS4Cl2-Type Oxysulfide Chlorides of the Lanthanides (M = L a -N d )
	Abstract	Oxysulfide chlorides, M4OS4Cl2, o f the lanthanides (M = L a -N d) are obtained upon the oxi dation o f the metals with sulfur in the presence o f MOC1 (or M 20 3) and MC13 in appropriate molar ratios. Additional NaCl or an excess o f MC13 serving as a flux provide even single crys talline material after reactions at 850 °C for seven days in sealed tantalum capsules. The crys tal structure o f M4OS4Cl2 (hexagonal, P 6 3mc, no. 186, Z = 2; M = La: a = 933.19(3), c = 701.22(4) pm, c/a = 0.7514, R = RH = 0.020; M = Ce: a = 925.49(3), c = 694.13(3) pm, c/a = 0.7500; M = Pr: a = 919.72(4), c = 688.53(4) pm, c/a = 0.7486; M = Nd: a = 914.25(4), c = 683.12(4) pm, c/a = 0.7472, R = 0.022, Rw = 0.019) contains isolated 0 2--centered (M 3+)4 te-trahedra which are surrounded by twelve S2-and six Cl-, capping vertices, edges, and faces o f each tetrahedron and linking to other [OM4] units. Basically, the structure is identical to that o f Ba4OCl6 if Ba2+ is substituted by M 3+ and 2/3 o f the CL anions are replaced by S2-to secure charge neutrality in M4OS4Cl2. Different models for the C L /S 2-replacement are presented on the basis o f comparisons o f the Madelung part o f the lattice energy (M A PLE) with the M APLE sum o f the binaries (M 20 3, M 2S3, and MC13).
	Reference	Z. Naturforsch. 49b, 340 (1994); eingegangen am 27. September 1993
	Published	1994
	Keywords	Lanthanides, Oxysulfide Chlorides, Synthesis, Crystal Structure
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0340.pdf
	Identifier	ZNB-1994-49b-0340
	Volume	49

11	Author	Frank Weller, Fritjof Schmock, Kurt Dehnicke, Kurt Findeisen Bayer-Werk	Requires cookie*
	Title	Synthese, IR-Spektrum und Kristallstruktur von 1.3.5-Trichlortriazinium-hexachloroantimonat, [HC3N3C13]SbCl6 Synthesis, IR Spectrum and Crystal Structure of 1.3.5-Trichlortriazinium Hexachloroantim onate, [HC3N3Cl3]SbCl6
	Abstract	,3,5-Trichlortriazinium hexachloroantimonate has been prepared by the reaction of CCl2 = N-COCl with antimony pentachloride in boiling dichloromethane. The compound was characterized by IR spectroscopy and by a crystal structure determination. [HC3N3Cl3]SbCl6 crystallizes in the monoclinic space group P 2 Jn with four formula units per unit cell. 2503 observed unique reflections, R = 0.029. Lattice dimensions at 19 °C: a = 1314.1(1), b = 958.2(1), c = 1329.1(1) pm, ß = 117.113(5)°). The compound forms ion pairs via a linear N -H • • • Cl bridge, thus distorting the SbCl6~ ion from octahedral geometry. The C3N3 skeleton of the [HC3N3C13]+ ion is nearly planar, but the hydrogen atom lies about 30 pm out of this plane.
	Reference	Z. Naturforsch. 49b, 360—364 (1994); eingegangen am 3. November 1993 1.3.
	Published	1994
	Keywords	5-Trichlortriazinium Salt, Synthesis, IR Spectra, Crystal Structure 1
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0360.pdf
	Identifier	ZNB-1994-49b-0360
	Volume	49

12	Author	Enno Lork, Ulrich Behrens, Detlef Viets, Rüdiger Mews	Requires cookie*
	Title	Die Kristallstruktur von A sF5 0 S C F 2S (0 2)CF2 The Crystal Structure of A sF 5 * 0& C F2S (0 2)C F 2
	Abstract	The crystal structure of AsF5 • 0$C F2S(02)CF2 is reported. It crystallizes in the orthorhombic space group Pnma with a = 749.1(3) pm, b = 770.6(3) pm and c = 1630.0(5) pm, V = 960.9(6)-106 pm3, Z = 4. Einleitung Intensiv ist in den letzten Jähen die Chemie der Dithietane F 2tS (O x)FyC F 2S(Ov)Fw im Arbeitskreis Sundermeyer [1] und von uns [2] untersucht wor den. Ein Ziel unserer Arbeiten war es, das D onor verhalten dieser Systeme gegenüber Fluor-Lewis-Säuren (AsF5, SbF5, BF3) zu untersuchen und die Grenzen zwischen Carbenium-, Sulfoniumsalz-und Addukt-Bildung zu erkennen. Durch Strukturun tersuchungen konnte belegt werden, daß AsF5 aus F2CSCF2S F " abstrahiert unter Bildung des cycli schen Carbeniumions FCSC F2S+ [lb]; nach IR-und 1' 9F-N M R -U ntersuchungen führt die analoge Umsetzung von F 7SCF?S(0")C F7 (n = 0 -2) zu Sul-foniumsalzen FSC F2S(0")CF2+ [lc], während in Sulfoxid-Derivaten die Lewis-Säure an den Sauer stoff unter Bildung von F 2CS(0")CF2S 0 • M F 5 (n = 0 -2) addiert wird. In der vorliegenden Arbeit be richten wir über die Struktur des Adduktes F2C S 0 2C F2S 0 • A sF5 (2 a).
	Reference	Z. Naturforsch. 49b, 422—424 (1994); eingegangen am 21. Oktober 1993
	Published	1994
	Keywords	Dithietanes, Sulfoxides, Adducts with Lewis-Acids, Crystal Structure
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	Identifier	ZNB-1994-49b-0422_n
	Volume	49

13	Author	Andreas Ahle, K. Urt Dehnicke, CäciliaM. Aichle-Mössmer, Joachim Strähle	Requires cookie*
	Title	Synthesis and Crystal Structure of [Na( 12-Crown-4)2]2[Fe4Se4Cl4]
	Abstract	[N a(12-crow n-4)2]2[Fe4Se4Cl4] has been pre pared by the reaction o f FeCl2 with N a2Se4 in di-methylform amide solution in the presence o f 12-crown-4 as dark red crystals, which were char acterized by a_ crystal structure determination. Space group P 1, Z = 2, 6295 observed unique re flections, R = 0.085. Lattice dim ensions at 20 °C: a = 1397.3(3), b = 1501.8(4), c = 1570.1(4) pm, a = 85.86(2)°, ß = 64.06(2)°, y = 65.01(2)°. The structure consists o f [Na(12-crown-4)2]+ cations and cuban-like anions [Fe4Se4Cl4]2" with Fe — Fe contacts o f 282.8(3) pm.
	Reference	Z. Naturforsch. 49b, 434 (1994); eingegangen am 30. September 1993
	Published	1994
	Keywords	Tetranuclear Iron Selenium Cluster Dianion, Synthesis, Crystal Structure
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	Identifier	ZNB-1994-49b-0434_n
	Volume	49

14	Author	Wolfgang Blase, Gerhard Cordier, Matthias Ludwig, Rüdiger Kniep	Requires cookie*
	Title	Sr3[Al2N 4l: Ein Nitridoaluminat mit gewellten Tetraederketten * [AlN4/23 ] Sr3[Al2N 4]: A Nitridoaluminate with Corrugated Tetrahedral Chains j,[AlN4/23_]
	Abstract	Sr3[Al2N 4] (Pnna, Nr. 52; a = 590.1(3), b = 1000.5(5), c = 958.0(4) pm; Z = 4) was prepared from the elements (m olar ratio Sr: A1 = 3:1; reaction with N 2, 1 atm, 24 h; Tmax = 1 1 0 0 °C). The crystal structure contains corrugated chains ifA lN ^ 3'] which consist of distorted A1N4 tetrahedra sharing com mon edges (A l-N : 188.5(7)-195.8(7) pm; N -A l-N : 95.0(3)-126.0(5)°). The nitrogen atom s form a distorted ccp arrangement. 3/4 of the octahedral holes are occupied by Sr atoms; 1 /4 o f the tetrahedral holes are occupied by A1 atoms. Sr3[Al2N4] can be described in terms o f the Zintl concept (isosteric relation of [AIN,]3-to SiS-,).
	Reference	Z. Naturforsch. 49b, 501—505 (1994); eingegangen am 22. November 1993
	Published	1994
	Keywords	N itridoalum inate, Tetrahedral Chain-Anions, Preparation, Crystal Structure
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	Identifier	ZNB-1994-49b-0501
	Volume	49

15	Author	G. Tams, Hk Miiller-Buschbaum	Requires cookie*
	Title	A Contribution to the Crystal Chemistry of Alcaline Alealine Earth Precious Metal Perovskites. Synthesis and Crystal Structure of NaBa4Cuo,5Pti,50 8
	Abstract	Single crystals of the phase NaBa4Cu0 5P t1 s0 8 were prepared in closed silver tubes. The black and moisture sensitive crystals were investigated by four-circle diffractometer X-ray tech niques. They show trigonal symmetry, space group D2-P321, a = 10.0644, c = 8.3811 A, Z = 3 and belong to the perovskites. The typical M20 9 double octahedra are occupied by Pt4+ and Cu2+ in a different manner. Na+ is partly in and out of the centres of trigonal prisms of oxygen. These features will be discussed with respect
	Reference	Z. Naturforsch. 49b, 585—588 (1994); eingegangen am 12. Januar 1994
	Published	1994
	Keywords	Sodium, Barium, Copper, Platinum, Crystal Structure
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	Identifier	ZNB-1994-49b-0585
	Volume	49

16	Author	C. U., D. Osterloh, Hk Müller-Buschbaum	Requires cookie*
	Title	Das erste Oxocuprat/-Arsenat mit Kupfer in gemischter Valenz
	Abstract	,56C u o , 4 4) C u (A s 0 4)3 The First O xocuprate/Arsenate Containing Mixed Valent Copper: Cu(Mg2.56Cu0.44)C u(A sO4) 3 Single crystals of Cu(Mg2 56Cu0 44)C u (A s0 4)3 have been prepared by C 0 2-LASER technique and investigated by X-ray diffraction methods. The light blue crystals show monoclinic sym metry, space group C2h-C 2/c, a = 11.897, b = 12.855, c -6.688 A, ß = 113.06°, Z = 4. The structure type is characterized by A s 0 4 tetrahedra, dumb-bell-like coordinated Cu(I), twisted C u 0 4 square polygons and octahedra statistically occupied by Mg/Cu2+.
	Reference	Z. Naturforsch. 49b, 589—592 (1994); eingegangen am 14. Januar 1994
	Published	1994
	Keywords	Magnesium, Copper, Arsenic Oxide, Crystal Structure
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	Identifier	ZNB-1994-49b-0589
	Volume	49

17	Author	Klaus Stöwe	Requires cookie*
	Title	Zur Struktur und Dotierung von Selenosilikaten: die Kristallstruktur von Er2S e S i0 4 und Er3 75Ca0 25Se2 75C10 25Si20 7 Structure and Doping of Seleno Silicates: the Crystal Structures of Er2SeSi04 and E r3 7^CaQ 2$Se2 ^C Iq ^Si^O-y
	Abstract	Well-shaped brown and pink isometric crystals were obtained as by-products o f the syn thesis o f erbium selenides from the elements in evacuated and sealed silica ampoules with graphite inlets. They could be identified as erbium seleno m ono-and disilicates by energy dis persive X-ray fluorescence and X-ray structure determination. The monosilicate Er2S e S i0 4 crystallizes isotypically to N d 2S e S i0 4 in the space group Pbcm with the lattice parameters a = 600.2(2), b = 688.0(2), c = 1075.2(2) pm and represents the second known seleno inosilicate o f the rare earths. From X-ray structure analysis an isotypic relation between the disilicate Er3 75Ca0 25Se2 75C10 25Si20 7 and the com pound Sm4S3Si2O v was found, the former crystallizing in the space group 14,/am d with the lattice parameters a -1177.7(2) and c = 1376.5(2) pm. The doping o f the sorosilicate with the elements Ca and Cl originated from contam inations in the graphit inlets used in the procedure.
	Reference	Z. Naturforsch. 49b, 733—7 (1994); eingegangen am 13. Januar 1994
	Published	1994
	Keywords	Erbium Seleno Silicates, Crystal Structures, Doping Effects
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0733.pdf
	Identifier	ZNB-1994-49b-0733
	Volume	49

18	Author	S. Möhr, Hk Müller-Buschbaum	Requires cookie*
	Title	Ein gemischtvalentes Oxometallat mit Cr3+ anstelle von Ti3+: Ba2Ti4+Cr20 13
	Abstract	Single crystals of Ba2Ti4+C r20 13 w ere p rep a red by C 0 2-L A S E R h igh te m p era tu re r ea ctio n s and in v estig a te d by X -ra y w o rk . T h e c o m p o u n d c ry sta llize s w ith m o n o c li nic sym m etry, a = 15.0 1 8 5 , b = 3 .9 4 1 9 , c -9 .0 7 6 4 Ä , ß = 9 8 .1 3 7 °, Z = 2. B a 2T i4Cr20 13 is iso ty p ic to N a 2T i60 13. T h e crystal stru ctu re is d isc u sse d w ith r e sp e ct to o rd ered or d iso rd ered d istrib u tio n s o f T i4+ and C r3+ u sin g c a lc u la tio n s o f C o u lo m b term s o f la ttice energy. It is sh o w n , th at th e sta b ility o f th is stru ctu re ty p e w ill b e d e c r e ased by rep la ce m en t o f N a + by io n s w ith h ig h er o x id a tio n sta tes.
	Reference	Z. Naturforsch. 49b, 911 (1994); eingegangen am 17. Februar 1994
	Published	1994
	Keywords	Barium, Titanium, Chromium, Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0911.pdf
	Identifier	ZNB-1994-49b-0911
	Volume	49

19	Author	S. Möhr, Hk Müller-Buschbaum	Requires cookie*
	Title	Uber ein gemischtvalentes Oxoniobat mit planaren Polygonen um Niob und Barium: BaNb2+Nb2+0 6 On a Mixed Valent Oxoniobate Containing Planar Polygons A round Niobium and Barium: BaNb2 +N b^+0 6
	Abstract	Single crystals of B aN b30 6 were prepared by C 0 2-LA SER high temperature technique. The compound crystallizes with trigonal symmetry C fv-R 3 m , a = 11.4333, c -3.4949Ä , Z = 3. The new structure type is characterized by planar N b 0 4 and planar B a 0 6 polygons. The results are discussed with respect to related compounds like Ca0.75 Nb3O6 or N aNb30 6.
	Reference	Z. Naturforsch. 49b, 915 (1994); eingegangen am 17. Februar 1994
	Published	1994
	Keywords	Barium, Niobium, Oxide, Synthesis, Crystal Structure
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0915.pdf
	Identifier	ZNB-1994-49b-0915
	Volume	49

20	Author	Hk Müller-Buschbaum, S. Frenzen	Requires cookie*
	Title	Zur
	Abstract	Kenntnis von EuBeGd20 5 mit einem Beitrag über Phasen der Zusammensetzung M1 _xM'A .BeLn20 5 : Ca0,4Sr0,6BeSm2O5, Ba0,25Ca0,75BeNd2O5 und Ba0,36Sr0,64BeNd2O5 On E uB eG d20 5 and on Phases of the Composition M 1_^M'xBeLn20 5: Ca0,4Sr06BeSm2O 5, Bao,2sCao,75 BeNd2 0 5 and Ba0 3 6 Sr0,64BeNd2O5 Single crystals of (I): E uB eG d20 5, (II): Ca0,4Sr0ABeSm 20 5, (III): Ba0,25 Ca()75B eN d2O 5 and (IV): Ba<)3 6Sr()64B eN d2O s were prepared by (I): plasma torch and (II)-(IV): C 0 2-LASER technique. X-Rayo investigations lead to (I) monoclinic (space group C 2h-P2j/c, a = 7.126, b = 6.457, c = 9.394 A, ß = 90.40°) and (I I)-(I V) orthorhombic symmetry (D ^ -P n m a). (II: a = 9.454, b = 7.142, c = 6.490 A; III: a = 9.508, b = 7.188, c = 6.531 A; IV: a = 9.642, b = 7.295, c = 6.614 A). In contrary to the phases M j^ M '^ B eL ^ O s, E uBeG d2Os is characterized by an ordered distribution of Eu2+ and G d3+ inside o f the Kagome network.
	Reference	Z. Naturforsch. 49b, 919 (1994); eingegangen am 28. Februar 1994
	Published	1994
	Keywords	Alkaline Earth, Beryllium, Rare Earth, Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/49/ZNB-1994-49b-0919.pdf
	Identifier	ZNB-1994-49b-0919
	Volume	49

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