| 41 | Author
| O. Sfreddo, Ch Rabbow, HkM. Üller-B, Uschbaum | Requires cookie* | | Title
| Eine neue Verbindung im System Ba/Ln/Zn/Pt/O: Bs^Sn^Zi^PtOis On a New Com pound in the System B a/Ln/Zn/Pt/O : Ba4Sm 4Z n3P tO |5  | | | Abstract
| Reactions of mixtures of B aC 03, ZnO, Sm20 3 (3:5: 1) heated in platinum crucibles up to 1250 °C led to big black single crystals of Ba4Sm4Zn3P t0 15. The new compound crystallizes with hexagonal symmetry, space group C^-Pö^mc, a = 1 L657, c = 6,789 A , Z = 2. It is isotypic with Ba6Nd2Al4O l5 but shows an ordered Pt4+ and Zn2+ distribution over the aluminium positions. The octahedrally coordinated barium sites of the Ba6Nd2Al40 15 type are occupied by Sm3+. In comparison to compounds of the composition Ba6Ln2M40 15 (M = Al, Fe, Co), Ba4Sm4Zn3PtOi5 is the first example containing different oxidation states at the M '+ positions. | | |
Reference
| Z. Naturforsch. 51b, 338—342 (1996); eingegangen am 22. August 1995 | | |
Published
| 1996 | | |
Keywords
| Barium Rare Earth, Zinc, Platinum, Oxide, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0338.pdf | | | Identifier
| ZNB-1996-51b-0338 | | | Volume
| 51 | |
42 | Author
| Ch Rabbow, HkM. Üller-B, Uschbaum | Requires cookie* | | Title
| Zur Kenntnis eines Barium-Lanthanoid-Aluminat-Zinkats: BaLuAlZn30 7 mit einem Anhang zu Ba2Er2Zn80 13  | | | Abstract
| Reactions of B aC 03, ZnO, Lu20 3 and A120 3 mixtures at temperatures up to 1500 °C led to small and colourless rods of BaLuAlZn30 7. The new compound crystallizes with hexagonal symmetry, space group CöV -P63mc, a = 6.273, c =10.161 A, Z = 2. In spite of small differences in the oxygen content BaLuAlZn30 7 is isotypic to Ba2Ln2Zn80 13. The crystal structure shows Zn2+ with tetrahedral, Lu '+ with octahedral and Ba:+ with anticuboctahedral coordination by 0 2~. It has been shown that parts of the [Zn3A107]5_ network are fragments of the ZnO structure. In consequence one oxygen atom is fourfold coordinated by zinc/aluminium. The space group of Ba2Ln2ZnxO i3 must be corrected to C6V -P63mc. | | |
Reference
| Z. Naturforsch. 51b, 343—347 (1996); eingegangen am 27. Juli 1995 | | |
Published
| 1996 | | |
Keywords
| Barium, Rare Earth, Zinc, Aluminium, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0343.pdf | | | Identifier
| ZNB-1996-51b-0343 | | | Volume
| 51 | |
43 | Author
| BernhardG. Ollasa, S. Bernd, Peiser1, H. Artm, Ut Stahp, Jürgen Sieglenb, Joachim Strähleb | Requires cookie* | | Title
| Electrochemistry of Oxygenation Catalysts, Part 6* Electrosynthesis, Structure, Analytical and Electrochemical Properties of Monomeric [Coin(salen)(DMF)2]+ X' Salts (X = PF6, C104)  | | | Abstract
| Electrochemistry [CoH1(salen)(DMF)2]+ X" salts [X = PF6, C104; salen = bis(salicyliden)ethylendiiminato; DMF = dimethylformamide] have been synthesized by electrochemical and chemical (air) oxidation of Co"(salen). Their monomeric structure with two DMF molecules in the axial positions in both the solid state and DMF solution is shown by X-ray crystal structure analysis, thermal analysis, mass spectroscopy, and 'H and l3C NMR spectroscopy. The electrochemical reduction of the [Coni(salen)(DMF)2]+ cation is investigated by cyclic voltammetry and com pared to the oxidation of the neutral CoH(salen). The redox reaction connecting the cobalt(II) and the cobalt(III) species appears to be a quasi-reversible electron transfer. These properties make the [Co1 1 (salen)(DMF)2]+ X-salts starting materials for the analysis of the interaction of basic substrates with cobalt(III) species in the context of the biomimetic oxygenation reactions catalyzed by such complexes. | | |
Reference
| Z. Naturforsch. 51b, 388—398 (1996); received September 4. 1995 | | |
Published
| 1996 | | |
Keywords
| Cobalt Complexes, Oxygenation Catalysts, Crystal Structure, Solution Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0388.pdf | | | Identifier
| ZNB-1996-51b-0388 | | | Volume
| 51 | |
44 | Author
| Danita De, W. Aal, M. Anfred Zabel, Klaus-Jürgen | Requires cookie* | | Title
| The Crystal Structure o f /?-CsI04, the Room-Temperature Modification o f Cesium Periodate  | | | Abstract
| The crystal structure of /?-CsI04, the room-tem-perature modification o f cesium periodate, was determined as orthorhombic, space group Pnma, with a = 5.8644(5), b = 6.0326(4), c = 14.379(1) A and Z = 4. The structure was refined to = 0.0309, wR2 = 0.0701 for 425 absorption-corrected reflections. /?-CsI04 is isostructural with yS-CsRe04. The structure comprises isolated I 0 4 tetrahedra, linked together by Cs ions. The average 1-0 dis tance was found to be 1.747 A . | | |
Reference
| Z. Naturforsch. 51b, 441—443 (1996); received July 17 1995 | | |
Published
| 1996 | | |
Keywords
| Cesium Periodate, Room-Temperature Modifica tion, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0441_n.pdf | | | Identifier
| ZNB-1996-51b-0441_n | | | Volume
| 51 | |
45 | Author
| O. Sedello, Hk Müller-Buschbaum | Requires cookie* | | Title
| On the Crystal Structure o f (C u ,M n )3 66M o30 12  | | | Abstract
| Single crystals o f (Cu,M n)3 66M o 30 12 have been prepared in sealed copper tubes. X-ray investiga tions lead to orthorhombic symmetry, space group Dih-Pnm a, a = 5.1541(9), b = 10.788(2), c = 18.114(3)) Ä , Z = 4. (Cu,M n)366M o 30 12 is iso typic to NaCo2 31M o 30 12 and (C u,C o)3 75M o 30 12 with split positions for two o f the metals. | | |
Reference
| Z. Naturforsch. 51b, 447—449 (1996); eingegangen am 31. August 1995 | | |
Published
| 1996 | | |
Keywords
| Copper, Manganese, Molybdenum Oxide, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0447_n.pdf | | | Identifier
| ZNB-1996-51b-0447_n | | | Volume
| 51 | |
46 | Author
| O. Sedello, Hk Müller-Buschbaum | Requires cookie* | | Title
| On the Crystal Structure of (Cu, M n )U M o 30 12  | | | Abstract
| Single crystals of (C u,M n)U M o30 12 have been prepared in sealed copper tubes. X-ray investiga tions lead to hexagonal symmetry, space group C|h-P63/m, a = 9.7895 (13), c = 6.202(1) A , z = 2. (C u ,M n)U M o30 12 is isotypic to CdThM o30 12. Calculations of the Coulomb terms o f lattice energy with respect to different oxidation states o f copper, molybdenum and uranium and the pre viously described pair of isotypic compounds of CdThM o30 12 to Na2ThRe60 24 are discussed. | | |
Reference
| Z. Naturforsch. 51b, 450—452 (1996); eingegangen am 5. September 1995 | | |
Published
| 1996 | | |
Keywords
| Copper, Manganese, Uranium Molybdenum Oxide, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0450_n.pdf | | | Identifier
| ZNB-1996-51b-0450_n | | | Volume
| 51 | |
47 | Author
| Hk Müller-Buschbaum, H. Ünsal | Requires cookie* | | Title
| On Ba6Pr2C o4O i5 and Ba5SrPr2C o40 15  | | | Abstract
| Ba6Pr2Co40 15 (I) and Ba5SrPr2Co40 15 (I I) have been prepared by high temperature C 0 2-L A S E R techniques. Both compounds crystallize with hexagonal symmetry, space group C£v-P63mc, (I): a = 11.814(1), c = 7.100(2) A ; (II): a = 11.646(1), c = 6.8602 A , Z = 2. It is remarkable that the strongly reducing Pr3+ can coexist with the more oxidizing Co3+. | | |
Reference
| Z. Naturforsch. 51b, 453—455 (1996); eingegangen am 2. Oktober 1995 | | |
Published
| 1996 | | |
Keywords
| Barium, Cobalt, Praseodym, Oxygen, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0453_n.pdf | | | Identifier
| ZNB-1996-51b-0453_n | | | Volume
| 51 | |
48 | Author
| =. Eu, Hk Müller-Buschbaum, L. W. Lff | Requires cookie* | | Title
| Weitere Verbindungen mit isolierten quadratischen P d 0 4-Polygonen: Compounds Containing Isolated Square Planar P d 0 4 Polygons: B aPd Ln 20 5 (L  | | | Abstract
| New compounds o f the composition BaPdLn2O s (Ln = Eu, Gd, Dy, H o) have been prepa red by crystallization from flux. They crystallize isotypic to BaPtLn7Ö 5, space group D-4h-P4/ mbm. Eu: a = 6.6359(6), c = 5.885(3) A ; Gd: a = 6.608(3), c = 5.873(3) A ; Dy: a = 6.5431(7), c = 5.8574(8) A ; Ho: a = 6.522(4), c = 5.855(5) A , Z = 2. The crystal structure is characterized by isolated planar P d 0 4 polygons incorporated into a framework o f edge-and corner-sharing doubly capped BaO s cubes and edge-and face-sharing L n 0 6 prisms. | | |
Reference
| Z. Naturforsch. 51b, 461—464 (1996); eingegangen am 16. Oktober 1995 | | |
Published
| 1996 | | |
Keywords
| Barium, Palladium, Rare Earth Oxide, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0461.pdf | | | Identifier
| ZNB-1996-51b-0461 | | | Volume
| 51 | |
49 | Author
| Hk Sedello, Müller-Buschbaum | Requires cookie* | | Title
| O  | | | Abstract
| Single crystals of BaCuTe03T e 0 4 have been prepared by crystallisation from melts. X-ray investigations lead to orthorhombic symmetry, space group C2v-Ama2, a = 5.4869(8), b = 15.412(1), c = 7.2066(4) A , Z = 4. This compound represents a new structure type, containing B aO 10, C u 0 5, T e 0 6 and T e 0 4 polyhedra. The lone pair (E) of TeIV completes the TeIV0 4 polyhedron to a trigonal T e 0 4E bipyramid. The Te to E distance is estimated by calculations o f the Coulomb terms of lattice energy to 1.43 A . | | |
Reference
| Z. Naturforsch. 51b, 465—468 (1996); eingegangen am 31. August 1995 | | |
Published
| 1996 | | |
Keywords
| Barium, Copper, Tellurium, Oxide, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0465.pdf | | | Identifier
| ZNB-1996-51b-0465 | | | Volume
| 51 | |
50 | Author
| Z., D. Frerichs, Hk Müller-Buschbaum | Requires cookie* | | Title
| Synthesis and Crystal Chemistry o f the /3-Form o f a M ixed Zinc Orthoarsenate  | | | Abstract
| Single crystals o f Zn228M g0 72(A s 0 4) 2 have been prepared by C 0 2 L A S E R techniques. The compound crystallizes with monoclinic symmetry space group C 2h-P2j/n and the lattice parameters a = 5.292(2), b = 8.450(3), c = 7.737(3) Ä , ß = 96.33(3)°, Z = 2. Zn2 28M g072(A s O 4) 2 is isotypic to /3-Zn3(A s 0 4)2. The formation of the /3-Zn3(A s 0 4) 2 struc ture instead o f other possible orthoarsenates is discussed. | | |
Reference
| Z. Naturforsch. 51b, 469—472 (1996); eingegangen am 2. Oktober 1995 | | |
Published
| 1996 | | |
Keywords
| Zinc, Magnesium, Arsenic, Oxide, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0469.pdf | | | Identifier
| ZNB-1996-51b-0469 | | | Volume
| 51 | |
52 | Author
| O. Schrandt, Hk Müller-Buschbaum | Requires cookie* | | Title
| Geordnete Metallverteilung in K B a V 0 4 und K S rV 0 4 mit /?-K2S 0 4-Struktur Ordered Metal Distribution in K B a V 0 4 and K S r V 0 4 Showing p -K 2S 0 4 Structure  | | | Abstract
| Single crystals of K B a V 0 4 (I) and K S rV 0 4 (I I) have been prepared by crystallization from V 20 5 flux. The yellowish crystals show orthorhombic symmetry, space group D'^-Pnma with (I): a = 7.774(2), b = 5.899(1), c = 10.375(2) A , (II): a = 7.400(2), b = 5.812(1), c -9.961(1), Z = 4. Both compounds show an ordered distribution o f K + and Ba2+ and Sr2+ respectively. The different sizes of the K 0 1() and BaOy (S r 0 9) polyhedra are discussed with respect to those of the /3-K2S 0 4 structure, considering the calculations o f the Coulomb terms of lattice energy. | | |
Reference
| Z. Naturforsch. 51b, 477—480 (1996); eingegangen am 5. September 1995 | | |
Published
| 1996 | | |
Keywords
| Potassium, Strontium Barium, Vanadium Oxid, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0477.pdf | | | Identifier
| ZNB-1996-51b-0477 | | | Volume
| 51 | |
53 | Author
| S. Frenzen, Hk Müller-Buschbaum | Requires cookie* | | Title
| Eine silberhaltige Phase eines Oxoruthenats: A g (MN a2,3Ca4,3R u 0 8 A Silver Containing Phase o f an Oxoruthenate: A g 04N a 23Ca43R u O 8  | | | Abstract
| Single crystals of A g 04Na23Ca43RuO8 have been prepared by heating Na20 2, CaO and ruthenium in closed silver tubes. Silver took part in the reaction. The crystal structure was investigated by X-ray techniques. A g 04N a2.3Ca43R uO 8 crystallizes with orthorhombic sym metry, space group D^-Cm m m ; a = 9.255(1), b = 6.683(1), c = 6.696(3) Ä , Z = 2. It shows relations to the sodium chloride structure. A statistical distribution of A g + and N a+ can be separated in micro space by splitting one oxygen position to give a dumb-bell like O -A g -O and an octahedral N a 0 6 coordination. | | |
Reference
| Z. Naturforsch. 51b, 485—488 (1996); eingegangen am 16. Oktober 1995 | | |
Published
| 1996 | | |
Keywords
| Silver, Sodium, Calcium, Ruthenium Oxide, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0485.pdf | | | Identifier
| ZNB-1996-51b-0485 | | | Volume
| 51 | |
54 | Author
| Silke Busche, Karsten Bluhm | Requires cookie* | | Title
| Synthese und Kristallstruktur von Lanthanoidzinkboraten L n Z n ^ O jo) mit Ln = Ce, Nd, Tb Synthesis and Crystal Structure o f Rare Earth Zinc Borates LnZn(B5O ]0) with Ln = Ce, Nd, Tb  | | | Abstract
| Single crystals o f the new compounds LnZn(B5O |0) (Ln = (A) C e3+, (B) N d3+, (C) T b '+) were obtained by using a B 20 3 flux technique. X-ray investigations led to space group C2h-P 2,/n (Nr. 14) with lattice parameters: (A) a = 874.5(1), b = 761.4(1), c = 950.0(1), ß = 92.80(1)°, (B) a = 868.6(2), b = 760.9(2), c = 946.0(2), 0 = 92.9 9 (2)°, (C) a = 858.2(2), b = 760.5(2), c = 939.3(2), ß = 93.56(2)°, Z = 4. The structure is isotypic with C oSm (B 5 O |0) and is characte rized by two-dimensional infinite 2 (B 5 O 10)5_ ions. Ln is tenfold coordinated by oxygen, and Zn2+ occupies distorted Z n 0 6 polyfiedra. | | |
Reference
| Z. Naturforsch. 51b, 671—6 (1996); eingegangen am 26. Oktober 1995 | | |
Published
| 1996 | | |
Keywords
| Rare Earth, Zinc, Borate, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0671.pdf | | | Identifier
| ZNB-1996-51b-0671 | | | Volume
| 51 | |
55 | Author
| Karsten Bluhm, Andre Wiesch | Requires cookie* | | Title
| Synthese und Kristallstruktur von NiHo2(B20 5)2, das erste Nickellanthanoidborat mit einem ^ (B 20 5)4"-Anion Synthesis and Crystal Structure of NiHo2(B20 5)2, the First Nickel Lanthanoid Borates with a (^ (B 20 5)4" A nion  | | | Abstract
| Single crystals o f N iH o2(B20 5) 2 were prepared by a B20 3 flux-technique in high temperature reactions at 1450 °C and investigated by X-ray diffraction. They crystallize in the space group C 2h-P 2 ,/c (Nr. 14) with a = 451.0(4); b = 724.8(3); c = 938.8(6) pm; ß = 9 1 ,39(1)°; Z = 2. The compound is isotypic to CuTb2(B20 5) 2 as well as to the gadolinite structure (F eY 2 (B e S i0 5)2) and contains a two dimensional infinite anion with the formula 2 (B 2 0 5)4~. The borate layers consist o f four-and eight-membered rings o f edge-sharing B 0 4 tetrahedra. The layers are connected via copper-centered elongated oxygen-octahedra and slightly distorted tetragonal H o 0 8 antiprisms. | | |
Reference
| Z. Naturforsch. 51b, 677 (1996); eingegangen am 9. November 1995 | | |
Published
| 1996 | | |
Keywords
| N ickel, Holmium, Borate, Synthesis, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0677.pdf | | | Identifier
| ZNB-1996-51b-0677 | | | Volume
| 51 | |
56 | Author
| Angeline Stier, Klaus-Jürgen Range | Requires cookie* | | Title
| Dicyanometallate, VII [1] Darstellung und Kristallstruktur von Gadolinium-tris-dicyanoaurat (I), Gd[Au(CN)2]3-2,3H20 Dicyano Metallates, VII [1] Preparation and Crystal Structure o f Gadolinium-tris-dicyanoaurate (I), Gd[Au(CN)2]3 -2,3H20  | | | Abstract
| The title compound has been prepared by adding a stoichiometric amount of gadolinium nitrate hexahydrate to an aqueous solution of potassium dicyanoaurate(I). Single crystals could be obtained by slow evaporation from the saturated solution. The compound crystallizes hexa-gonally, space group P-62m, with a = 6.6319(6), c = 9.108(2) Ä, c/a = 1.3734 and Z = 1. The structure comprises layers of considerably bent dicyanoaurate groups. The gold atoms form a nearly regular 3.6.3.6 -Kagome net with a layer sequence AA.. and an Au -Au distanceoof 3.316(2) A, i. e. remarkably shorter than that found in KAu(CN)2 (Au -Au = 3.652(1) Ä). Above and below the gold layers, the terminal nitrogen atoms of the dicyanoaurate groups build up a two-dimensional net work in the a,b plane, thereby creating trigonal-prismatic holes, which are occupied by the gadolinium ions. Up to three water molecules per unit cell complete the coordination sphere around the gadolinium ion to form a tricapped trigonal prism. The analogous compounds with Ln = Sm, Eu, Tb and Dy are obviously isostructural with the Gd compound, as can be inferred from preliminary X-ray studies. | | |
Reference
| Z. Naturforsch. 51b, 698—702 (1996); eingegangen am 13. Oktober 1995 | | |
Published
| 1996 | | |
Keywords
| Gadolinium-fm-dicyanoaurate(I), Preparation, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0698.pdf | | | Identifier
| ZNB-1996-51b-0698 | | | Volume
| 51 | |
57 | Author
| Cheong-HwaKarsten Park, Bluhm | Requires cookie* | | Title
| Zur Synthese und Kristallstruktur von Bariumboroarsenat Ba(BAs05) mit einem Beitrag über Bariumorthoarsenat Ba3(As04)2 Synthesis and Crystal Structure of Barium Boroarsenate B a(B A s05) with a Contribution on Barium Orthoarsenate Ba3(A s0 4)2  | | | Abstract
| Single crystals of Ba(BAs05) (I) and Ba3(As04)2 (II) were obtained by melting B20 3, arsenic pentoxide and BaO at 1100°C. Both compounds crystallize trigonally, space groups (I): C3 -P3t (Nr. 144), (II): D3d -R3m (Nr. 166), with the lattice parameters (I): a = 726.7(1), c = 710.6(1) pm, Z = 3 and (II): a = 576.7(1), c = 2116.3(2) pm, Z = 3. Ba(BAsOj) is isotypic to Pb(BAs05) (Stillwellite structure) and Ba3(As04)2 to Ba3(P04)2. The structure of Ba(BAs05) is characterized by helical chains of rings of two borate tetrahedra and one arsenate tetrahedron. Barium is tenfold coordinated by oxygen. A rod-like sequence of coordination polyhedra, A s04-Ba(2)O|0-Ba(1)O|2-Ba(2)O|0-AsO4 is characteristic in the crystal structure of Ba3(A s04)2. | | |
Reference
| Z. Naturforsch. 51b, 722—726 (1996); eingegangen am 9. November 1995 | | |
Published
| 1996 | | |
Keywords
| Barium Arsenic, Borate, Synthesis, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0722.pdf | | | Identifier
| ZNB-1996-51b-0722 | | | Volume
| 51 | |
58 | Author
| Universität Dortmund | Requires cookie* | | Title
|  | | | Abstract
| Phenylsulfinic acid C6Fr5S 0 2H crystallizes in the orthorombic space group Pna21, a = 734.3(4), b = 579.9(5), c = 1476.5(9) pm, with four formula units per unit cell. The configuration of the sulfur atom is pyramidal. The molecules form infinite chains via strong hydrogen bonds. The Raman spectra of CA H5S 0 2H and C6H5SOCl are reported and discussed. Uber die Kristallstruktur der Phenylsulfinsäure C6H5S 0 2H [11] | | |
Reference
| Z. Naturforsch. 51b, 739—743 (1996); eingegangen am 22. September 1995 | | |
Published
| 1996 | | |
Keywords
| Phenylsulfinic Acid, Crystal Structure, Raman Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0739.pdf | | | Identifier
| ZNB-1996-51b-0739 | | | Volume
| 51 | |
59 | Author
| | Requires cookie* | | Title
| H  | | | Abstract
| ig h P re ssu re S y n th esis a n d S in g le-C ry stal S tru c tu re R e fin e m e n t o f C alciu m A u ra te (I II) , C a A u 20 4 A n ja L o u zik o v a, K la u s-Jü rg e Single crystals of calcium aurate(III), CaAu20 4, were obtained by high-pressure treatment of a C a0/A u20 3/K 0 2 mixture at 40 kbar, 1200 °C in a modified Belt-type apparatus. The crystals are tetragonal, space group 14j/a, with a = 5.9868(7), c = 10.043(1) A, c/a = 1.678 and Z = 4. CaAu20 4 is isostructural with LaPd20 4, SrAu20 4 and BaAu20 4. Its structure comprises square-planar A u 0 4 groups (< A u -0 > = 2.007 A), which are stacked into columns along [100] and [010], These columns are connected by shared corners forming a three-dimensional framework. The Ca ions are situated in tunnels created by the gold-oxygen partial structure. They are surroun ded by eight oxygen atoms (< C a -0 > = 2.490 A) in a slightly distorted dodecahedron. | | |
Reference
| Z. Naturforsch. 51b, 747—750 (1996); eingegangen am 14. November 1995 | | |
Published
| 1996 | | |
Keywords
| Calcium Aurate(III), High-Pressure Synthesis, Crystal Structure | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0747_n.pdf | | | Identifier
| ZNB-1996-51b-0747_n | | | Volume
| 51 | |
|