| | 1 | Author
| PeterG. Jones, Ralf Scheibach, Einhard Schwarzmann, Carsten Thöne, Andreas Vielmäder | Requires cookie* | | | Title
| Darstellung und Kristallstruktur einiger Tetracarboxylatoaurate(III) Preparation and Crystal Structure of Some Tetracarboxylatoaurates(III)  | | | | Abstract
| Various salts M(AuX 4) 2 with X = OCOCH, or OCOC 2 H 5 have been prepared by two methods: (i) the reaction of metal hydroxides M(OH) 2 with HAuCl 4 , followed by treatment of the inter-mediate products with acetic or propionic acid, or (ii) the reaction of aurates M{Au(OH) 4 } 2 with the carboxylic acids. The crystal structure of Pb{Au(0C0CH 3) 4 } 2 -2H 2 0 shows that it is isostruc-tural to the strontium salt, consisting of molecular units Pb{Au(OCOCH 3) 4 } 2 with crystallo-graphic symmetry 2. The water of crystallization forms neither coordinate bonds to a metal nor hydrogen bonds. In the analogous zinc salt the water is coordinated to the zinc atom, and the structure is a layer polymer. The two compounds that crystallize in anhydrous form. Ba{Au(OCOCH 3) 4 } 2 and Pb{Au(OCOC 2 H s) 4 } 2 , have not yet yielded crystals suitable for X-ray analysis. | | | |
Reference
| Z. Naturforsch. 43b, 807—812 (1988); eingegangen am 3. März 1988 | | | |
Published
| 1988 | | | |
Keywords
| Gold, Carboxylate, Alkaline Earths, Crystal Structure | | | |
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| default:Reihe_B/43/ZNB-1988-43b-0807.pdf | | | | Identifier
| ZNB-1988-43b-0807 | | | | Volume
| 43 | |
| 2 | 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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| default:Reihe_B/49/ZNB-1994-49b-0919.pdf | | | | Identifier
| ZNB-1994-49b-0919 | | | | Volume
| 49 | |
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