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'Zinc' in keywords

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1	Author	Mit Komplexe, KupferUnd Mangan, Zink, CarstenO. Kienitz, Carsten Thöne, PeterG. Jones	Requires cookie*
	Title	Zur Koordinationschemie des 2,2'-Dipyridyldiselenids (PySeSePy), Teil 2 [1]
	Abstract	The coordination chemistry of 2,2'-dipyridyldiselenide (PySeSePy) towards mangane se, copper and zinc centres has been studied. The complexes [MnBr2-/V,/V'-(PySeSePy)] (1), [CuBr2-/V,/V'-(PySeSePy)] (2), [Cu-(//-Br)-7V(/V'-(PySeSePy)]2 (3), [Cu-()U-Br)-{p-N,N'-(PySeSePy)}]" (4), [Cu-(/i-Cl)-/V,W'-(PySeSePy)]2 (5), [Zn(OOCC6F5)2-/V,/V'-(PySeSePy)] (6) and [Z n (0 S 0 2CF3)2-./V>/V'-(PySeSePy)] (7) have been synthesised and the crystal structures of 1, 3, 4 and 6 determined. 1, 3 and 6 display seven-membered metallacycles with tetrahedral coordination of the metal centres. In these cases 2,2'-dipyridyldiselenide acts as a chelating ligand. In the polymeric complex 4, 2,2'-dipyridyldiselenide acts as a bridging ligand. All com plexes display selenium-selenium single bonds with an average length of 232 pm. In contrast to the analogous chloro and nitrato complexes, the zinc complexes 6 and 7 are not dissociated in solution, as evidenced by 77Se NMR experiments. The corresponding resonances are shifted downfield in comparison with the ligand.
	Reference	Z. Naturforsch. 55b, 587—596 (2000); eingegangen am 3. März 2000
	Published	2000
	Keywords	Manganese, Copper, Zinc
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	TEI-XML for	default:Reihe_B/55/ZNB-2000-55b-0587.pdf
	Identifier	ZNB-2000-55b-0587
	Volume	55

2	Author	G. Segewitz	Requires cookie*
	Title	Liganden-und Isotopenaustausch im System: Serumproteine — Zink — Polyaminopolycarbonsäuren Ligand and Isotope Exchange in the System: Serum Proteins — Zinc — Polyaminopolycarbonic Acids
	Abstract	In vitro-studies show that the Ca-chelates of EDTA and DTPA are equally effective in removing Zn from the proteins and that the Zn-protein pool is composed of several fractions with different stabilities. Only a small fraction of the protein-bound Zn can be labelled by 65 Zn in vitro and, as to the mobilization of 65 Zn, Ca-DTPA was found to be 20 times more effective than equimolar Ca-EDTA. The isotope exchange between Zn-DTPA and protein-bound 65 Zn is an extremely fast reaction whereas in the case of Zn-EDTA a sluggish exchange takes place. The analysis of the results led to conclusion that the ligand and isotope exchange reactions in the case of EDTA proceed via the free Zn 2+ -ion; with the high-dentate DTPA, however, the formation of ternary and mixed complexes plays an important role. The implications of the findings as related to the toxi-city of the Ca-chelates are discussed.
	Reference	(Z. Naturforsch. 27b, 1370—1375 [1972]; eingegangen am 14. Juli 1972)
	Published	1972
	Keywords	Zinc, Radiozinc, Proteins, Ethylenediaminetetraacetate, Diethylenetriaminepentaacetate
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	TEI-XML for	default:Reihe_B/27/ZNB-1972-27b-1370.pdf
	Identifier	ZNB-1972-27b-1370
	Volume	27

3	Author	A. G. Galinos, J. K. Kouinis, P. V. Ioannou, ThF. Zafiropoulos, S. P. Perlepes	Requires cookie*
	Title	Compounds of Complex Halo and Pseudohalo Acids of the Group II B Metals, Part I Etherate, Pyridine and Aniline Compounds of Zn(II)
	Abstract	The preparation of sixteen new etherate, pyridine and aniline compounds of complex halo and pseudohalo acids of Zn(II) is reported. The study of some physical and chemical properties as well as the UV and IR spectra of these compounds are discussed. Tetrahedral structures are proposed for all compounds in the solid state.
	Reference	Z. Naturforsch. 34b, 1101—1106 (1979); received May 11 1979
	Published	1979
	Keywords	Ether, Pyridine, Aniline, Thiocyanate, Zinc
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	TEI-XML for	default:Reihe_B/34/ZNB-1979-34b-1101.pdf
	Identifier	ZNB-1979-34b-1101
	Volume	34

4	Author	Hans Siebert, Walther Jentsch	Requires cookie*
	Title	Rhombohedrally Crystallizing Zinc Hexacyanometalates(III) Zn3[M(CN)e]2
	Abstract	The preparation of a non-cubic modification of water-free hexacyanometalates(III) Zn3[M(CN)6]2 (M = Cr, Fe, Co) is described. The X-ray powder diagrams of these compounds have been indexed rhombohedrally, space group Dgd-R"3c, Z = 2.
	Reference	(Z. Naturforsch. 36b, 123—124 [1981]; eingegangen am 17. September 1980)
	Published	1981
	Keywords	X-ray, Zinc, Cyanometalates
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	TEI-XML for	default:Reihe_B/36/ZNB-1981-36b-0123_n.pdf
	Identifier	ZNB-1981-36b-0123_n
	Volume	36

5	Author	A. Drašner, Ž. Blažina	Requires cookie*
	Title	Structural Studies in the Systems ZrZn 2 _ x Al x and HfZn 2 _ x Al x
	Abstract	A great number of samples in the systems ZrZ^-arAls and HfZn2_xAl z was prepared and investigated by means of X-ray powder diffraction. In both systems hitherto unknown ternary Friauf-Laves structures of the MgCu2-type (S. G. Fd3m) were identified. Their homogeneity regions were determined to be ZrZno.eAl1.4-ZrZno.4Al1.6 and HfZn1.25Alo.75-HfZno.sAli.s, respectively. The unit cell parameter of ZrZno.sAli.s is a = 747.3 ± 0.3 pm, and for HfZno.sAli.s a = 741.4 ± 0.3 pm. For the alloys of these particular compositions the atomic positions were determined using trial and error methods. In the investigated systems, depending on the composition and/or thermal treatment, alloys having the AuCu3 structure (S. G. Pm3m) were also observed. Structural correlations of these ternary Friauf-Laves phases with their corresponding binary prototypes were made in terms of stacking sequences.
	Reference	Z. Naturforsch. 36b, 1547—1550 (1981); received August 21 1981
	Published	1981
	Keywords	Aluminum, Hafnium, Zinc, Zirconium, Alloy
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	TEI-XML for	default:Reihe_B/36/ZNB-1981-36b-1547.pdf
	Identifier	ZNB-1981-36b-1547
	Volume	36

6	Author	M. Pušelj, Z. Ban, A. Drašner	Requires cookie*
	Title	On the Crystal Structure of HgZn3
	Abstract	The crystal structure of the intermetallic phase HgZn3 was determined using X-ray single crystal and powder diffraction methods. The phase belongs to the orthorhombic system, most probable space group being Cmc2i, and appears to be isostructural with /S'-Cu3Ti. Under standard preparative conditions a statistical distribution of both atomic species was observed.
	Reference	Z. Naturforsch. 37b, 557—559 (1982); received December 14 1981
	Published	1982
	Keywords	Crystal Structure, Zinc, Mercury, Amalgam
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	TEI-XML for	default:Reihe_B/37/ZNB-1982-37b-0557.pdf
	Identifier	ZNB-1982-37b-0557
	Volume	37

7	Author	D. Frerichs, C. H. Park, Hk Müller-Buschbaum	Requires cookie*
	Title	Zur Kenntnis der Tief-und Hochtemperaturform eines Oxidarsenats des Zinks: Zn0Z n3(A s0 4)2 On the Low and High Temperature Form o f an Oxidearsenate of Zinc: Z n 0 Z n 3( A s 0 4)2
	Abstract	Single crystals of the low (t-) and high (h-) temperature form o f Z n 0 Z n 3(A s 0 4)2 have been prepared by flux and by C 0 2-L A SER techniques respectively. Both compounds crystal lizes monoclinic, space group C2h-P2;/n with the lattice parameters t-Z n 0 Z n 3(A s 0 4)2: a = 9.807(3), b = 8.180(2), c = 9.967(2) A , ß = 116.53(2)°, Z = 4 and h -Z n 0 Z n 3(A s 0 4)2: a = 9.743(3), b = 8.163(8), c = 17.933(2) A , ß = 91.55(2)°, Z = 8. Similarities and differences of the crystal structures will be discussed.
	Reference	Z. Naturforsch. 51b, 233 (1996); eingegangen am 10. Juli 1995
	Published	1996
	Keywords	Zinc, Arsenic, Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0233.pdf
	Identifier	ZNB-1996-51b-0233
	Volume	51

8	Author	Silke Busche, K. Arsten Bluhm	Requires cookie*
	Title	Synthese und Kristallstruktur von Dibariumzink-bis(cyclotriborat) Ba2Zn(B30 6)2
	Abstract	Single crystals of the new compound Ba2Zn(B30 6)2 were obtained by using a B20 3 flux technique. They crystallize in an as yet unknown structure type. X-ray investigations led to space group Cj'-Pl (Nr.2) with lattice parameters a = 715.5(2), b = 720.5(2), c = 1178.9(4), a = 78.96(2)°, /3 = 85.45(2)°, j = 60.12(1)°, Z = 2. The structure is characterized by iso lated (B30 6)3_-rings and contains two ninefold coordinated Ba-sites. Zn2+ is tetrahedrally coordinated by oxygen. The relation to the crystal structures of high-temperature BaB20 4 and Ba2Ca(B30 6)2 is discussed.
	Reference	Z. Naturforsch. 51b, 309—312 (1996); eingegangen am 26. September 1995
	Published	1996
	Keywords	Barium, Zinc, Borate, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0309.pdf
	Identifier	ZNB-1996-51b-0309
	Volume	51

9	Author	D. Frerichs, C. H. Park, HkM. Üller-B, Uschbaum	Requires cookie*
	Title	Zur Kenntnis zweier Formen des Zinkorthoarsenates: a-Z n 3(A s04)2 und /3-Zn3(A s0 4)2 On Two Forms o f Zinc O rthoarsenate: a -Z n 3(A s 0 4)2 and /3-Zn3(A s 0 4)2
	Abstract	Single crystals of two forms of zinc orthoarsenate (a-Z n3(A s04)2 (I) and /3-Zn3(A s04)2 (II)) have been prepared by flux techniques. Both compounds crystallize monoclinically, space groups (I): Cih-P2l/c, (II): Cih-P21/n, with the lattice parameters (I): a = 6.306(2), b = 8.652(2), c = 'ol 1.321(4) A, ß = 92.25(5) °, Z = 4 and (II): a = 5.281(1), b = 8.494(2), c = 7.726(3) A, ß = 96.39(3)°, Z = 2. ct-Zn3(A s04)2 is isotypic to I-Cu3(A s04)2 and ß-Zn3(A s04)2 to 7-Zn3(P 0 4)2. Similarities and differences of the crystal structures are discussed.
	Reference	Z. Naturforsch. 51b, 333—337 (1996); eingegangen am 31. August 1995
	Published	1996
	Keywords	Zinc, Arsenic, Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0333.pdf
	Identifier	ZNB-1996-51b-0333
	Volume	51

10	Author	Peter Klüfers, Albrecht Mewis	Requires cookie*
	Title	Zur Struktur der Verbindungen BaZn2P2 und BaZn2As2 The Crystal Structure of BaZii2P2 and BaZn2As2
	Abstract	New yü?2-X^2-compounds, BaZn2?2 and BaZn2As2, were prepared. The structures were determined by X-ray methods. In the case of BaZn2P2 (S.G. I4/mmm; a = 4.019 A, c = 13.228 A) layers of edgeshared ZnP4-tetrahedra alternate with Ba-layers; in the case of BaZn2As2 (S.G. Pnma; a = 10.010 A, b = 4.246 A, c = 10.910 A) Zn and As build a 3D-network of edge and vertex shared tetrahedra with Ba in the holes of this network.
	Reference	Z. Naturforsch. 33b, 151—155 (1978); eingegangen am 19. Oktober 1977
	Published	1978
	Keywords	Ternary Barium Compounds, Zinc, Phosphide, Arsenide, Crystal Structure
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	TEI-XML for	default:Reihe_B/33/ZNB-1978-33b-0151.pdf
	Identifier	ZNB-1978-33b-0151
	Volume	33

11	Author	ChrL. Teske	Requires cookie*
	Title	Darstellung, Kristallstrukturdaten und Eigenschaften der quaternären Thiostannate(IV) BaZnSnS4 und BaMnSnS4 Preparation, Crystal Data and Properties of the Quaternary Thiostannates(IV) BaZnSnS4 and BaMnSnS4
	Abstract	BaZnSnS4 and BaMnSnS4 were prepared for the first time and the atomic positions of the crystal structure were refined. Both compounds crystallize isotypically with BaCdSnS4 [1]. Space group C^-Fdd2 (No. 43) orthorhombic. BaZnSnS4: a = 2196,4; b = 2150,4; c = 1270,i pm; BaMnSnS4: a = 2173,i; b = 2144,9; c -1259,i.
	Reference	Z. Naturforsch. 35b, 509—510 (1980); eingegangen am 30. Oktober 1979
	Published	1980
	Keywords	Crystal Structure, Interatomic Distances, Zinc, Manganese, Sulfur
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0509_n.pdf
	Identifier	ZNB-1980-35b-0509_n
	Volume	35

12	Author	HeinzDieter Lutz, SalehM. El-Suradi, Christiane Mertins, Bernward Engelen	Requires cookie*
	Title	Zur Kenntnis der Hydrate des Mangan-und Zinksulfits. Röntgenographische, thermoanaly tische, Raman-und IR-spektroskopische Untersuchungen
	Abstract	X-ray, IR and Raman data as well as thermoanalytical measurements (DTA, TG, and DTG) of several new hydrates, viz. MnS03 • 2 1 /z H20, MnS03 • 2 H20, ZnS03 • 3 H20, /S-ZnS03 • 2 1 /2 H20, and y-ZnS03 • 2 x /2 H20, and of previously reported hydrates in the systems MnS03-H20, ZnS03-H20, and MnS03-ZnS03-H20 are presented. Furthermore, the formation of mixed crystals is studied in the system MnS03-ZnS03-H20. The following crystal data have been determined by single crystal measurements: MnS03 • 2 1 /2 H20 (P4i2i2):a = b = 968.4(1), c = 1040.9(1) pm, Z = 8, MnS03 • 2 H20 (P2i/w):a = 650.9(1), b = 873.8(1), c = 774.7(1) pm, ß = 99.80(1)°, Z = 4, ZnS03 • 3 H20 (Pnma): a = 953.6(1), b = 553.0(1), c = 941.9(1) pm, Z = 4, ß-ZnS03 • 21/2 H20 (P4i2!2): a = b = 952.1(1), c = 1025.4(1) pm, Z = 8, y-ZnS03 • 2 X \2 H20 (with small amount of Mn 2 +) (o-rh.): a = 1493(1), b = 1812(2), c = 753(1) pm, Z = 16, ZnS03 • 1/2 H20 (mon.): a = 1326.7(5), b = 706.3(2), c = 834.4(1) pm, ß = 117.41(3)°, Z = 8. The IR spectra show that, with the exception of y-ZnS03 • 2 x /2 H20, both weak and strong hydrogen bonds are present in the sulfite hydrates. Under an S02 atmosphere the sulfite hydrates can be dehydrated without simultaneous dissociation to the oxide and sulfur dioxide. The isotypic hydrates /?-MnS03 • 3 H20 and ZnS03 • 3 H20 (ß-MnSÖ3 • 3 H20 type), and MnS03 • 2 H20 and ZnS03 • 2 H20 (ZnSe03 • 2 H20 type) form complete mixed crystal series. Solid solutions are also formed from a-MnS03 • 3 H20 (a-FeS03 • 3 H20 type), y-ZnS03 • 2 l /2 H20, MnS03 • 1 H20, and ZnS03 • 1 /2 H20. No incorporation of Mn or Zn could be observed for a-ZnS03 • 2Va H20 and the isotype hydrates MnS03 • 2!/a H20 and ß-ZnS03 • 2 1 /2 H20 (CoS03 • 21/2 H20 type).
	Reference	Z. Naturforsch. 35b, 808—816 (1980); eingegangen am 17. Dezember 1979
	Published	1980
	Keywords	Sulfite, Hydrates, Manganese, Zinc, X-ray
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	TEI-XML for	default:Reihe_B/35/ZNB-1980-35b-0808.pdf
	Identifier	ZNB-1980-35b-0808
	Volume	35

13	Author	Ali Mahan, Albrecht Mewis	Requires cookie*
	Title	A B2X2 -Verbindungen mit CaAl2Si2-Struktur, IX [1] Compounds with the CaAl2Si2 Structure, IX [1]
	Abstract	The compounds ZrCu2P2, YZnCuP2, LaZnCuP2, and CeZnCuP2 have been prepared and their structures have been determined. They are isotypic and crystallize trigonally in the CaAl2Si2-type structure (space group P3m 1) with the lattice constants: ZrCu2P2 a = 381,2(1) pm, c = 617,1(2) pm, YZnCuP2 a = 398,3(1) pm, c = 652,3(2) pm, LaZnCuP2 a = 408,2(1) pm, c = 674,2(2) pm, CeZnCuP2 a = 406,4(1) pm, c = 669,7(2) pm.
	Reference	Z. Naturforsch. 38b, 1041—1045 (1983); eingegangen am 13. Mai 1983
	Published	1983
	Keywords	Ternary and Quaternary Phosphides, Copper, Zinc, Crystal Structure
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	TEI-XML for	default:Reihe_B/38/ZNB-1983-38b-1041.pdf
	Identifier	ZNB-1983-38b-1041
	Volume	38

14	Author	FranzA. Mautner, Harald Krischner, Christoph Kratky	Requires cookie*
	Title	Darstellung und Kristallstruktur von Zinkazid * 4-Methylpyridin Preparation and Crystal Structure of Zinc Azide * 4-Methylpyridine
	Abstract	Zinc azide • 4-methylpyridine (1) is formed by the reaction of zinc azide with the corresponding pyridine in aqueous solution. The crystal structure was determined by single crystal X-ray diffrac-tion methods. The crystals of 1 are monoclinic, space group C2/c, Z = 4, a = 1085.5(2), b = 1692.7(11), c = 619.7(6) pm, ß = 113.47(5)°. Each zinc atom is surrounded by five nitrogen atoms (four from azide groups and one from the pyridine adduct) in a distorted trigonal bipyramidal fashion. The ZnN5-polyhedra share common edges to form chains along the crystallographic c-axis.
	Reference	Z. Naturforsch. 43b, 253—256 (1988); eingegangen am 22. Oktober/3. Dezember 1987
	Published	1988
	Keywords	Azide, Crystal Structure, 4-Methylpyridine, Pentacoordination, Zinc
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	TEI-XML for	default:Reihe_B/43/ZNB-1988-43b-0253.pdf
	Identifier	ZNB-1988-43b-0253
	Volume	43

15	Author	T. Sogo, J. Romero, A. Sousa, A. De Blas, M. L. Durán, E. E. Castellano	Requires cookie*
	Title	The Electrochemical Synthesis of Neutral Zinc(II) Complexes of Schiff Base Ligands: The Crystal Structure of Bis[N-(4-methylphenyl)salicylaldiminato]zinc(II)
	Abstract	The electrochemical synthesis and physico-chemical properties of neutral zinc(II) complexes of bidentate Schiff bases derived from salicylaldehydes are presented together with the X-ray struc-ture of bis[N-(4-methylphenyl)salicylaldiminato]zinc(II). The crystal is monoclinic, a = 21.877(3), b = 8.801(2), c = 12.027(5) Ä, ß = 96.55(3)°, space group C2/c. The complex is a monomer, and the zinc atom is tetrahedrally coordinated.
	Reference	Z. Naturforsch. 43b, 611—615 (1988); received November 5 1987/January 28. 1988
	Published	1988
	Keywords	X-Ray, Zinc, Schiff Bases, Electrochemical Synthesis
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	TEI-XML for	default:Reihe_B/43/ZNB-1988-43b-0611.pdf
	Identifier	ZNB-1988-43b-0611
	Volume	43

16	Author	Z. Naturforsch	Requires cookie*
	Title	K34[Zn2oIn85]: Eine ternäre Auffüllungsvariante des /?-rhomboedrischen Bors
	Abstract	In the crystal structure of K34[Zn2()In85] (a = 1827.7(5) pm, c = 3980.5(8) pm, R3m , Nr. 166, Z = 3, R1 = 0.056, wR2 = 0.124) the In and Zn atoms form the /3-rhombohedral boron structure. The structure contains In84 Samson polyhedra, and clusters of 18 In and 10 Zn atoms, forming three In12 icosahedra sharing two common triangular faces. The potassium atoms occupy the centres of truncated tetrahedra -forming the Samson polyhedra -and Kasper polyhedra.
	Reference	(Z. Naturforsch. 50b, 23 [1995]; eingegangen am 16. Juni 1994)
	Published	1995
	Keywords	Crystal Structure, Intermetallic Compound, Potassium, Zinc, Indium
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	TEI-XML for	default:Reihe_B/50/ZNB-1995-50b-0023.pdf
	Identifier	ZNB-1995-50b-0023
	Volume	50

17	Author	H. Szillat, Hk Müller-Buschbaum	Requires cookie*
	Title	Synthesis and Crystal Structure of (Cu,Zn)3 7 5 Mo30 12
	Abstract	Single crystals of (Cu,Zn)3 75Mo30 12 have been prepared by crystallization from melts and investigated by X-ray diffractometer techniques. (Cu,Zn)3 75Mo3Oi2 crystallizes orthorhom-bically, space group D^-P212,21, Z = 4, a = 17.947(9), b = 5.092(3), c = 10.685(5) A. It is isotypic to Cu385Mo30 12. All molybdenum atoms are tetrahedrally coordinated by oxygen atoms. There are layers of C u 0 6 and Z n 0 6 octahedra, while other metal sites are occupied by copper in a deformed prismatic coordination with one oxygen atom at a remarkably greater distance from copper than the other five. Some of the zinc atoms occupy positions in chains of face-sharing octahedra with an occupancy factor of 0.75. The crystal structure is discussed with respect to the isotypic compound Cu385Mo30 12 and compounds of the type CuLnMo20 8.
	Reference	Z. Naturforsch. 50b, 247—251 (1995); eingegangen am 13. September 1994
	Published	1995
	Keywords	Crystal Structure, Copper, Molybdenum, Zinc, Oxide
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	TEI-XML for	default:Reihe_B/50/ZNB-1995-50b-0247.pdf
	Identifier	ZNB-1995-50b-0247
	Volume	50

18	Author	N., Silke Busche, Karsten Bluhm	Requires cookie*
	Title	Synthese und Kristallstruktur der ersten zinkhaltigen Pyroborate
	Abstract	ii,5Z n 0,5(6 2 0 5) UI,d C o ^ Z n o ^ I ^ O s) Synthesis and Crystal Structure of the First Zinc Containing Pyroborates Nii.5Z n0.5(B2O 5) and Coj 5Z n0.5(B2O 5) The first zinc containing pyroborates Ni! sZ n ^ B ^ O s) (A) and 5Zn0 5(B 2O 5) (B) were prepared by using a B20 3 flux technique. Single crystals were investigated by X-ray diffrac tion and showed triclinic symmetry, space group C j-P l. The structures are isotypic to C o9(B 20 5) with the lattice parameters (A) « = 331.28(6), 6 = 613.87(11), c = 922.2(2), a = 104.067(11) °, ß = 90.672(13) °, y = 92.413(12) 0 and (B) 0 = 315.89(2), 6 = 612.84(6), c = 927.72(6), a = 104.103(7) °, ß = 91.020(6) °, y = 92.540(7) °, Z = 2. All metal point positions show an octahedral oxygen coordination and a partly statistical distribution o f Zn2+ and N i2+ or C o2+, respectively. Isolated nearly planar B20 5 units connect ribbons consisting o f edge sharing metal octahedra.
	Reference	Z. Naturforsch. 50b, 1445—1449 (1995); eingegangen am 25. April 1995
	Published	1995
	Keywords	Zinc, Nickel, Cobalt, Pyroborate, Crystal Structure
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	Identifier	ZNB-1995-50b-1445
	Volume	50

19	Author	Silke Busche, Karsten Bluhm	Requires cookie*
	Title	Zur Synthese und Kristallstruktur von Zinkboratoxiden mit isolierten, trigonal planaren B 0 3-Baugruppen: Zn5M n(B03)20 4 und Z nF e(B 03) 0 Synthesis and Crystal Structure of Zinc Borate Oxides Containing Isolated Trigonal Planar B 0 3 Units: Z n5M n (B 0 3)20 4 and Z n F e(B 0 3) 0
	Abstract	Single crystals of the new compounds Zn5M n (B 0 3)20 4 (A) and Z n F e (B 0 3) 0 (B) were prepared by using a B20 3 flux technique. Zn5M n (B 0 3)20 4 is isostructural with Ni5T i(B 0 3)20 4 and Z n F e (B 0 3) 0 is isotypic with the mineral warwickite. X-ray investiga tions on single crystals led to (A) space group D ^ -P b a m , a = 926.41(10), b = 1236.67(8), c = 304.55(3) pm, Z = 2, and (B) space group D i^ -P n m a, a = 924.62(4), b = 314.1(10), c = 935.3(2) pm, Z = 4. The structure o f Zn5M n (B 0 3)20 4 (A) contains four octahedrally coordi nated metal sites, one of these statistically occupied by Zn2+ and Mn4+. In the structure o f Z n F e (B 0 3) 0 the ions Zn2+ and Fe3+ occupy statistically both distorted octahedral sites. Both structures contain isolated B 0 3 units and oxygen that is not coordinated to boron.
	Reference	Z. Naturforsch. 50b, 1450—1454 (1995); eingegangen am 25. April 1995
	Published	1995
	Keywords	Zinc, Manganese, Iron Borate Oxide, Crystal Structure
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	Identifier	ZNB-1995-50b-1450
	Volume	50

20	Author	Karsten Busche, Bluhm	Requires cookie*
	Title	Silke
	Abstract	The compound Cu2 Z n(B 2 0 s) 0 was prepared by using a B 2 0 3 flux technique, and single crystals were investigated by X-ray diffraction (monoclinic symmetry, space group C2 h-P 2 i/c). The structure is isotypic to Cu2 C o(B 2 0 5) 0 with lattice parameters a = 327.38(2), b = 1479.4(3), c = 915.39(13), ß = 95.794(11)°, Z = 4, but with the significant difference that zinc is penta-coordinated by oxygen. Copper exhibits a nearly square planar or a square pyramidal coordi nation, respectively. The structure contains isolated B2 0 ? units and oxygen which is not coordinated to boron. Zur Synthese und Kristallstruktur von Kupferzinkpyroboratoxid Cu2Zn(B20 5) 0
	Reference	Z. Naturforsch. 50b, 1854—1858 (1995); eingegangen am 17. Mai 1995
	Published	1995
	Keywords	Copper, Zinc, Pyroborate, Oxide, Crystal Structure
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	Identifier	ZNB-1995-50b-1854
	Volume	50

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