| 21 | Author
| M. Ludwig3, R. Niewab, R. Kniep | Requires cookie* | | Title
| Dimers [A12N6]12-and Chains J j A lN ^ ] in the Crystal Structures of Ca6[Al2N6] and Ba3[Al2N4]  | | | Abstract
| Pale yellow transparent single crystals of Ca6[Al2Nö] (P 2\/c, No. 14, a = 693.7(3), b = 614.9(3), c = 987.1(5) pm, ß = 94.01(5)°; Z = 4) and colourless transparent single crystals of Ba.^ALN*] (Pnna, No. 52, a = 617.9(2), b = 1005.2(4), c = 1023.0(4) pm; Z = 4) were obtained from reactions of mixtures of the representative metals with nitrogen at Tmax = 1000 °C. The crystal structure of CaöfALNft] contains isolated units [ALNftJ12-built of two edge-sharing tetrahedra. Ba3[ALN4] is an isotype of S r^A bN ^. The crystal structure contains infinite chains ^ [A1N^T2] of trans edge-sharing tetrahedra. | | |
Reference
| Z. Naturforsch. 54b, 461—465 (1999); received December 18 1998 | | |
Published
| 1999 | | |
Keywords
| Nitridoaluminates, Preparation, Crystal Structure | | |
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| default:Reihe_B/54/ZNB-1999-54b-0461.pdf | | | Identifier
| ZNB-1999-54b-0461 | | | Volume
| 54 | |
22 | Author
| MarkusF. Zumdick, Rainer Pöttgen | Requires cookie* | | Title
| Condensed [Ru4Sn6] Units in the Stannides LnRu4Sn6 (Ln = La, Pr, Nd, Sm, Gd) -Synthesis, Structure, and Chemical Bonding  | | | Abstract
| The stannides LnRu4Sn6 (Ln = La, Pr, Nd, Sm, Gd) were prepared by reaction of the elements in an arc-melting furnace and subsequent annealing at 1120 K. The praseodymium, the neodymium, and the samarium stannide were obtained for the first time. The LnRu4Sn6 stannides were investigated by X-ray diffraction both on powders and single crystals. They adopt the YRu4Sn6 type structure which was refined from single crystal X-ray data for the samarium and the gadolinium compound: /42m, a = 686.1 (1), c = 977.7(2) pm, wR2 = 0.0649, 483 F2 values for SmRu4Sn6, and a = 685.2(1), c = 977.6(3) pm, wR2 = 0.0629, 554 F2 values for GdRu4Sn6 with 19 variables for each refinement. The striking structural motif of these stannides are distorted RuSnö octahedra with Ru-Sn distances ranging from 257 to 278 pm. Four of such octahedra are condensed via common edges and faces forming [Ru4Snö] units which are packed in a tetragonal body-centered arrangement. The rare-earth atoms fill the voids between the [Ru4Sn6] units. Based on an extended Hückel calculation, strong bonding interactions were found for the Ru-Sn and the various Sn-Sn contacts. | | |
Reference
| Z. Naturforsch. 54b, 863—869 (1999); received March 29 1999 | | |
Published
| 1999 | | |
Keywords
| Stannides, Crystal Structure, Chemical Bonding | | |
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| default:Reihe_B/54/ZNB-1999-54b-0863.pdf | | | Identifier
| ZNB-1999-54b-0863 | | | Volume
| 54 | |
23 | Author
| H. P. Fritz | Requires cookie* | | Title
| The Stannides RE R hSn (RE = Ho -Yb) and ScTSn (T = Pd, Pt) -Structure Refinements and 119Sn Mössbauer Spectroscopy  | | | Abstract
| The stannides RERhSn (RE = Ho -Yb) and ScTSn (T = Pd, Pt) were prepared by reaction of the elements in sealed tantalum tubes in a high-frequency furnace, by arc-melting, or by a tin-flux technique in quartz tubes. The rhodium based stannides crystallize with the ZrNiAl type structure, space group P62m. The four structures were refined from single crystal X-ray data: a = 754.5(3), c = 377.1(1) pm, wR2 = 0.0357, 233 F 2 values for HoRhSn, a = 753.3(1), c = 372.16(8) pm, wR2 = 0.0721, 233 F 2 values for ErRhSn, a = 753.7(3), c = 369.0(2) pm, wR2 = 0.0671,233 F 2 values for TmRhSn, and a = 753.17(5), c = 366.53(4) pm, wR2 = 0.0566, 180 F 2 values for YbRhSn with 14 parameters for each refinement. ScPdSn and ScPtSn adopt the HfRhSn type, a superstructure of ZrNiAl, space group P62c: a = 747.5(1), c = 710.2(1) pm, for ScPdSn, and a = 738.37(9), c = 729.47(9) pm, wR2 = 0.0452,369 F 2 values, 18 variables for ScPtSn. Structural motifs in these stannides are transition metal centered trigonal prisms formed by the rare earth and tin atoms. While these prisms are regular in the rhodium based stannides, significant distortions occur in ScPdSn and ScPtSn. The formation of the superstructure can be ascribed to packing reasons. The shortest interatomic distances occur between the transition metal (T) and tin atoms. These atoms form three-dimensional [FSn] networks in which the rare earth atoms fill distorted hexagonal channels. The series RERhSn displays a somewhat unique behavior. The a lattice parameter is more or less independent of the rare earth element, while the c lattice parameter shows the expected lanthanoid contraction. ll9Sn Mössbauer spectroscopic data of the rhodium stannides show signals at isomer shifts varying from 1.77 to 1.82 mm/s subject to quadrupole splitting between 0.75 to 0.82 mm/s. | | |
Reference
| Z. Naturforsch. 56b, 589—597 (2001); received April 12 2001 | | |
Published
| 2001 | | |
Keywords
| Stannides, Crystal Structure, Mössbauer Spectroscopy | | |
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| default:Reihe_B/56/ZNB-2001-56b-0589.pdf | | | Identifier
| ZNB-2001-56b-0589 | | | Volume
| 56 | |
24 | Author
| Thom As Fickenscher, G. Unter Kotzyba, Rolf-D Ieter, H. Offm, Ann, R. Ainer Pöttgen, H. P. Fritz | Requires cookie* | | Title
| Synthesis, Structure, and Magnetic Properties of EuAgCd and YbAgCd  | | | Abstract
| New intermetallic compounds EuAgCd and YbAgCd were synthesized in quantitative yield by reaction of the elements in sealed tantalum tubes in a high-frequency furnace. Both com pounds were investigated by X-ray diffraction on powders and single crystals: KHg2 type, Imma, a = 490.41(8), b = 771.0(1), c = 834.4(2) pm, wR2 = 0.0624, 255 F values, 12 variables for EuAgCd, and MgZn2 type, Pb^/mmc, a = 584.66(5), c = 946.83(9) pm, wR2 = 0.0502, 187 F 2 values, 11 variables for YbAgCd. Owing to the very small difference in scattering power, no long range ordering of the silver and cadmium atoms is evident from the X-ray data, although Ag-Cd ordering is expected. The silver and cadmium atoms randomly occupy the mercury and zinc positions of the KHg2 and MgZn2 type structures, respectively. In EuAgCd the [AgCd] substructure consists of strongly puckered, orthorhombically distorted Ag3 Cd3 hexagons, while a three-dimensional network of face-and comer-sharing tetrahedra is observed in YbAgCd. The rare earth atoms fill the space between the Ag3 Cd3 hexagons (EuAgCd) or within the three-dimensional tetrahedral network (YbAgCd). Magnetic susceptibility measurements in dicate Pauli paramagnetism for YbAgCd and Curie-Weiss behavior above 60 K for EuAgCd with an experimental magnetic moment of 7.82(3) /j b/Eu indicating divalent ytterbium and europium. Ferromagnetic ordering at Tc = 28.0(5) K is observed for EuAgCd. At 2 K and 5 T the saturation magnetization is 5.85(5) /iß/Eu. | | |
Reference
| Z. Naturforsch. 56b, 598—603 (2001); received April 12 2001 | | |
Published
| 2001 | | |
Keywords
| Cadmium, Crystal Structure, Magnetic Properties | | |
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| default:Reihe_B/56/ZNB-2001-56b-0598.pdf | | | Identifier
| ZNB-2001-56b-0598 | | | Volume
| 56 | |
26 | Author
| Hans-Georg Von Schnering, Wolfgang May | Requires cookie* | | Title
| Die Struktur des 2  | | | Abstract
| One of the diastereomeres of 2,3,4,6,7,8-hexamethyl-2,3,4,6,7,8-hexaphosphabicyclo-[3,3,0]octane (PMe)öC2H2 crystallizes in the space group P2i/n with four molecules per unit cell. Two independent molecules are nearly identical in shape but differ by inter-molecular packing. The five-membered rings have a skew chair conformation with all exocyclic methyl groups in axial positions leading to a staggered all-trans conformation of the bicyclic system. The mean bond lengths are P-P = 220.9 pm, P-C = 185.9 pm and C-C = 151.9 pm. | | |
Reference
| Z. Naturforsch. 33b, 698—698 (1978); eingegangen am 24. April 1978 | | |
Published
| 1978 | | |
Keywords
| Carbaphosphane, Molecular Structure, Crystal Structure | | |
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| default:Reihe_B/33/ZNB-1978-33b-0698.pdf | | | Identifier
| ZNB-1978-33b-0698 | | | Volume
| 33 | |
27 | Author
| Alain Schiff-Frangois, Gerhard Savelsberg, Herbert Schäfer | Requires cookie* | | Title
| Darstellung und Struktur von  | | | Abstract
| Three sulfurapatites have been prepared. They crystallize in the hexagonal system (P63/m) with the following lattice constants: BaS(As04)2S04: a= 1052.6(5) pm, c= 773.7(4) pm, c/a = 0,735; SrS(As04)2S04: a = 1016.1(8) pm, c= 741(1) pm, c/a = 0.729; SrS(P04)2S04: a = 980.3(8) pm, c= 727(1) pm, c/a = 0.742. | | |
Reference
| Z. Naturforsch. 34b, 764—765 (1979); eingegangen am 16. Februar 1979 | | |
Published
| 1979 | | |
Keywords
| Sulfur Apatite, Preparation, Crystal Structure | | |
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| default:Reihe_B/34/ZNB-1979-34b-0764_n.pdf | | | Identifier
| ZNB-1979-34b-0764_n | | | Volume
| 34 | |
29 | Author
| J. Schmachtel, Hk, Müller-Buschbaum | Requires cookie* | | Title
| Oxotitanate mit gemischter Valenz, II Zur Kenntnis von Sr2Ti6013 Oxotitanates with Mixed Valence, II About Sr2Ti60i3  | | | Abstract
| Single crystals of Sr2TieOi3 were prepared by heating a mixture of SrO • Ti203 • 2 TiOo in a vacuum furnace to 1800 °C for 6 hours. X-ray investigations show monoclinic sym-metry (a = 1525,0, b = 376,9, c = 916,4 pm; ß = 99,15°, space group Cgh-C2/m). Sr2Ti60i3 is isotypic with Ba2Ti60i3. | | |
Reference
| (Z. Naturforsch. 35b, 4—6 [1980]; eingegangen am 9. Oktober 1979) | | |
Published
| 1980 | | |
Keywords
| Strontium, Titanium, Oxygen, Crystal Structure | | |
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| default:Reihe_B/35/ZNB-1980-35b-0004.pdf | | | Identifier
| ZNB-1980-35b-0004 | | | Volume
| 35 | |
30 | Author
| Klaus Volk, Gerhard Cordier, Ralph Cook, Herbert Schäfer | Requires cookie* | | Title
| BaSbTe3 und BaBiSe3 Verbindungen mit BiSe-bzw. SbTe-Schichtverbänden BaSbTe3 and BaBiSe3 Compounds with BiSe-or SbTe-Layer Structures, Respectively  | | | Abstract
| The new compounds BaBiSe3 and BaSbTe3 crystallize in the orthorhombic system, space group P2i2i2i with BaBiSe3: a = 1724 ± 2 pm, b = 1600 ± 2 pm, c = 437.0 ± 0.5 pm; BaSbTe3: a = 1809 ± 2 pm, b = 1694 ± 2 pm, c = 463.5 ± 0.4 pm. BiSeö-or SbTe6-octahedra, resp., are connected by common edges to fourfold strings. These are bound by additional chalcogen atoms to sheets, between which the Ba ions are located. | | |
Reference
| Z. Naturforsch. 35b, 136—140 (1980); eingegangen am 16. Oktober 1979 | | |
Published
| 1980 | | |
Keywords
| Bariumbismutselenide, Bariumantimonytelluride, Crystal Structure | | |
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| default:Reihe_B/35/ZNB-1980-35b-0136.pdf | | | Identifier
| ZNB-1980-35b-0136 | | | Volume
| 35 | |
33 | Author
| Birgit Lehnis, Joachim Strähle | Requires cookie* | | Title
| Synthese und Kristallstruktur von C83(AuBr 4 ) 2 Br3 Synthesis and Crystal Structure of Cs3(AuBr4) 2 Br 3  | | | Abstract
| Cs3(AuBr4)2Br3 is obtained in the form of red needles by adding the stoichiometric amount of CsBr to a solution of HAuBr4 and Br3~ in aqueous HBr. The salt decomposes slowly at room temperature to form a mixed-valent, cubic bromo aurate(I,III), in which the linear AuBr 2 ~ ions are partially substituted by Br3~ ions. At 140 °C Cs 2 Au 2 Bre and CsBr are formed. Cs3(AuBr4) 2 Br3 crystallizes monoclinic with four formula units in the space group P2i/c. The structure is built up by AuBr 4 ~ and Br3~ anions and Cs+ cations. An average Au-Br distance of 242.2 pm was found for the square planar AuBr 4 ~ ion. The linear Br3~ groups are almost symmetrical with Br-Br distances of 254.0 and 256.2 pm. Therefore only two vibrations are observed in the IR spectrum: Vas = 172, <5 = 56 cm -1 . The absorptions of the AuBr 4 _ groups are: vas = 250, <5as= 113, y — 102 cm -1 . | | |
Reference
| Z. Naturforsch. 36b, 1504—1508 (1981); eingegangen am 8. September 1981 | | |
Published
| 1981 | | |
Keywords
| Synthesis, IR Spectra, Crystal Structure | | |
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| default:Reihe_B/36/ZNB-1981-36b-1504.pdf | | | Identifier
| ZNB-1981-36b-1504 | | | Volume
| 36 | |
36 | Author
| Synthesis, Crystal Structure Of, HerbertW. Roesky, Hartmut Hofmann, Mathias Noltemeyer, GeorgeM. Sheldrick | Requires cookie* | | Title
| Synthese und Kristallstruktur von l,l,l,3,3»3-Hexafluor-2-propylamino- l-thiooxamid +-Hexafluoro-2-propylamino- 1-thiooxamide"  | | | Abstract
| Dithiooxamide 1 reacts with hexafluoroacetone 2 at room temperature to yield 1,1,1,3,3,3-hexafluoro-2-propylamino-l-thiooxamide 3 and sulfur. The modes of formation of the bis(trifluoromethyl)-methyl group from hexafluoroacetone, the migra-tion of oxygen and the elimination of sulfur are not clear. Crystals of 3 are monoclinic, space group Cc, with a = 2865.3(13), b = 924.4(9), c = 702.9(6) pm, ß = 93.3(7)°. The structure was re-fined to R — 0.067 from 614 reflections. | | |
Reference
| (Z. Naturforsch. 40b, 124—126 [1985]; eingegangen am 13. August 1984) | | |
Published
| 1985 | | |
Keywords
| Dithiooxamide, Hexafluoroacetone, Crystal Structure | | |
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| default:Reihe_B/40/ZNB-1985-40b-0124_n.pdf | | | Identifier
| ZNB-1985-40b-0124_n | | | Volume
| 40 | |
37 | Author
| KurtO. Klepp | Requires cookie* | | Title
| Darstellung und Kristallstruktur von Tl 2 TiS 4 : Ein Perthiotitanat(IV) mit i-[TiS 4 2 "]-Ketten Preparation and Crystal Structure of Tl 2 TiS 4 : A Perthiotitanate(IV) with ^-[TiS 4 2 ~]-Chains  | | | Abstract
| Tl 2 TiS 4 is orthorhombic, space group Pbca, with a = 22.176(7), b = 9.484(4), c = 6.3977(9) A, Z = 8. The crystal structure was solved by direct methods and refined to a conventional R of0.058 for 704 reflections with I^3a(I). The crystal structure is characterized by infinite perthioanions, i-[TiS 4/2 (S 2) 2 -], which are separated by Tl + -cations. The anion chains are built up by distorted octahedra which share two skew edges to form infinite cis-chains running along [001], The two unshared S-atoms of each octahedron are connected via a S —S-single bond of 2.10 A length. The crystal structure is described as a mixed packing of TI-and S-atoms, composed of puckered T1S 2 -layers, in which the Ti-atoms occupy the octahedral interstices. The relationship of the ^-[XiS^ -]-chains to the anionic groups of Cs 2 TiS 3 is discussed. | | |
Reference
| Z. Naturforsch. 40b, 229—234 (1985); eingegangen am 27. September 1984 | | |
Published
| 1985 | | |
Keywords
| Thallium Perthiotitanate, Preparation, Crystal Structure | | |
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| default:Reihe_B/40/ZNB-1985-40b-0229.pdf | | | Identifier
| ZNB-1985-40b-0229 | | | Volume
| 40 | |
38 | Author
| HerbertW. Roesky, KaveripatnamS. Dhathathreyan, Mathias Noltemeyer, GeorgeM. Sheldrick | Requires cookie* | | Title
| Reactions of the Hexafluorothioacetone Dimer with Cyanides of Phosphorus, Arsenic and Germanium  | | | Abstract
| Cyanides such as P(CN) 3 , As(CN) 3 , PhP(CN) 2 , Bu'As(CN) 2 and Ge(CN) 4 react with [(CF 3) 2 CS] 2 (1) by insertion of the carbon atom of the /so-nitrile isomer into the four-mem-bered [CS] 2 ring to give compounds PR 3 (2), AsR 3 (3), FP(S)R 2 (4), PhP(S)R^ (5), Bu'AsR^ (6) and GeR 4 (7) respectively, where R' is the novel heterocyclic ligand —N=C—S—C(CF 3) 2 —S —C(CF 3) 2 . The crystal structures of 3 and 7 are reported. | | |
Reference
| Z. Naturforsch. 40b, 240—246 (1985); received September 19/October 25 1984 | | |
Published
| 1985 | | |
Keywords
| Crystal Structure, Hexafluorothioacetone, Nitriles, Heterocyclics | | |
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| default:Reihe_B/40/ZNB-1985-40b-0240.pdf | | | Identifier
| ZNB-1985-40b-0240 | | | Volume
| 40 | |
39 | Author
| PeterG. Jones, HerbertW. Roesky, Hansjörg Grützmacher, GeorgeM. Sheldrick | Requires cookie* | | Title
| Oxidative Knüpfung einer Phosphor-Phosphor-Bindung unter Einwirkung von Ag(I)-bzw. Cu(II)-Ionen: Synthese und Struktur von [(C 6 H5)PH 2 Ag{|i-(C 6 H 5 PH) 2 }]2 (AsF 6 ) 2 , einem sechsgliedrigen Silber-Phosphor-Ring The Oxidative Formation of a Phosphorus-Phosphorus Bond in the Presence of Ag(I) and Cu(II) Ions: Synthesis and Structure of [(C 6 H 5 )PH 2 Ag{^-(C 6 H 5 PH) 2 }] 2 (AsF 6 ) 2 , Containing a Six-Membered Silver-Phosphorus Ring  | | | Abstract
| The reaction between AgAsF 6 and phenylphosphine proceeds with formation of a phosphorus-phosphorus bond. The main product 1, [(C 6 H 5)PH 2 Ag{u-(C 6 H 5 PH) 2 }] 2 (AsF 6) 2 , was characterized by an X-ray structure determination [PI, a = 919.0(4), b = 1109.8(4), c = 1316.4(5) pm, a = 97.48(3), ß = 107.25(3), y = 102.71(3)°, Z = 1, R = 0.057 for 2806 observed reflections], 1 contains Ag 2 P 4 rings; the silver atoms are further coordinated by phenylphosphine ligands, thus acquiring trigonal coordination geometry. A similar reaction is observed with Cu(AsF 6) 2 , forming the analogous Cu(I) complex 2. | | |
Reference
| Z. Naturforsch. 40b, 590—593 (1985); eingegangen am 28. Januar 1985 | | |
Published
| 1985 | | |
Keywords
| Crystal Structure, Silver, Phenylphosphine, Copper | | |
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| default:Reihe_B/40/ZNB-1985-40b-0590.pdf | | | Identifier
| ZNB-1985-40b-0590 | | | Volume
| 40 | |
40 | Author
| G. Erhard, C. Ordier, H. Erbert Schäfer, Michael Stelter | Requires cookie* | | Title
| CanInSb9, eine Zintlphase mit diskreten InSb49 -Anionen On C anInSb9, a New Zintlphase with Discrete InSb49-Anions  | | | Abstract
| CauInSb9 crystallizes in the orthorhombic system, space group Iba2 (No. 45), with a = 1189.4(5) pm, b = 1259.4(5) pm, c = 1673.0(7) pm. In the structure there are different kinds o f anions, i.e. isolated Sb3~ anions, Sb24~ dumbbells and isolated InSb49* tetrahedra. The new compound belongs to the Zintlphases. | | |
Reference
| Z. Naturforsch. 40b, 868—871 (1985); eingegangen am 3. April 1985 | | |
Published
| 1985 | | |
Keywords
| Calciumantimonidoindate, Crystal Structure, Zintlphase | | |
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| default:Reihe_B/40/ZNB-1985-40b-0868.pdf | | | Identifier
| ZNB-1985-40b-0868 | | | Volume
| 40 | |
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