| | 1 | Author
| E. Klüver, Hk Müller-Buschbaum | Requires cookie* | | | Title
| Uber einen Lanthanoid-Mangan-Apatit: Nd4M n(Si04)30 On a Lanthanoid Manganese Apatite: Nd4M n(S i04)30  | | | | Abstract
| Single crystals of Nd4M n (S i0 4)30 have been prepared by a Bi20 3 flux in closed copper tubes. The colourless crystals show hexagonal symmetry, space group C |h-P 6 3/m, a -9,4986(9), c = 6,944(2) A, Z = 2. Nd4M n (S i0 4)30 crystallizes in the A patite structure and shows Nd3+ and Mn2+ with partly statistical distribution. A s a consequence of this, 0 (2) and 0 (4) are occupying split positions. | | | |
Reference
| (Z. Naturforsch. 50b, 61 [1995]; eingegangen am 25. Juli 1994) | | | |
Published
| 1995 | | | |
Keywords
| Neodymium, Manganese, Silicon, Apatite, Crystal Structure | | | |
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| default:Reihe_B/50/ZNB-1995-50b-0061.pdf | | | | Identifier
| ZNB-1995-50b-0061 | | | | Volume
| 50 | |
| 2 | Author
| Anne Utzolino, Karsten Bluhm | Requires cookie* | | | Title
| Zur Synthese und Kristallstruktur von manganhaltigen Boratoxiden | | | | Abstract
| M nF e(B 03) 0 und MnAl0,5Yo,5(B03) 0 Synthesis and Crystal Structure of Manganese Borate Oxides: M nFe(B03) 0 and MnAlo.5Yo.5(B 0 3) 0 Single crystals of the compounds M n F e(B 0 3) 0 (I) and MnAlo.5Y o.5(B 03) 0 (II), were obtained by a B20 3 flux technique. I crystallizes with orthorhombic symmetry, space group D ^ -P n m a (Nr.62), a -939.92; b = 319.41; c = 939.11 pm; Z = 4 and II with monoclinic symmetry, space group C2h-P 2 i/n (Nr. 14). a = 325.6; b = 955.1; c = 929.2 pm; ß = 90.70° ; Z = 4. I is isotypic to the mineral Warwickite, while II is a distorded variant of this structure. All metal ions are octahedrally coordinated. Both structures contain isolated, trigonal planar B 0 3 units and oxygen atoms that are not coordinated to boron. | | | |
Reference
| Z. Naturforsch. 50b, 1146—1150 (1995); eingegangen am 5. D ezem ber 1994 | | | |
Published
| 1995 | | | |
Keywords
| Manganese, Iron Aluminium, Yttrium, Borate Oxide, Crystal Structure | | | |
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| default:Reihe_B/50/ZNB-1995-50b-1146.pdf | | | | Identifier
| ZNB-1995-50b-1146 | | | | Volume
| 50 | |
| 3 | 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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| default:Reihe_B/50/ZNB-1995-50b-1450.pdf | | | | Identifier
| ZNB-1995-50b-1450 | | | | Volume
| 50 | |
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