Weitere Verbindungen des Ba17Ln16Zn8Pt4O57- Typs mit Ln = Dy, Ho, Er, Y / More Compounds of the Ba17Ln16Zn8Pt4O57 Type with Ln = Dy, Ho, Er, Y
1997 ◽
Vol 52
(9)
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pp. 1067-1071
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Keyword(s):
X Ray
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Abstract Single crystals of Ba17Dy16Zn8Pt4O57 (I), Ba17Ho16Zn8Pt4O57 (II), Ba17Er16Zn8Pt4O57 (III) and Ba17YZn8Pt4O57 (IV) have been prepared by high temperature reactions using platinum crucibles. X-ray investigations led to tetragonal symmetry, space group C54h - I4/m, (I) - (IV): a = 22.905(1), 22.840(1), 22.795(1), 22.848(1) Å and c = 5.728(1), 5.722(1), 5.700(1), 5.709(1) Å,Z = 2. The crystal structure is characterized by small square, medium-sized quadrangular and large rectangular tunnels, which are filled by oxygen, barium and zinc. The polyhedra network is discussed with respect to the network of compounds of the Ba13Dy8Zn4Pt4O37 type.
1994 ◽
Vol 49
(9)
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pp. 1277-1281
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