ZfN: Search Results

1	Author	Andre Wiesch3, Hauke Timmb, Karsten Bluhm3	Requires cookie*
	Title	Uber CuDy2[B80 16] und CuHo2[B80 16]: Zwei neue "Metaborate" mit einem ^ [B80 16]g_-Anion On CuDy2[B80 16] and CuHo2[B80 16]: Two New "Metaborates" with a ^ [B80 16]8-Anion
	Abstract	Nearly colourless single crystals of the compounds CuDy2 [B80 i 6] (I) and CuHo2[B80)6] (II) have been obtained by a B20 3 flux technique. They crystallize in the structure of CuTb2 [B80)6] (I) or in an orthorhombic variant (II). X-ray investigations on single crystals led to the space group C2h -P2!/c (Nr. 14) with lattice parameters a = 1025,5(10); b = 836,99(10); c = 621,2(8) pm, ß = 90.47(10)°; Z = 2 (I) and D^h -Pbam (Nr. 55) with a = 840,7(2), b = 616,6(2), c = 1022,0(2) pm, Z = 2 (II). The structures contain 1 [B80 16]8_ chains isolated from each other, which include tri-and tetracoordinated boron, T'fie chains consist of alternating twelve and eight-membered rings of boron and oxygen atoms connected by B 0 4 units. Dy,+ and H o 3+ are octacoordinated and Cu2+ is hexacoordinated in elongated octahedra by oxygen. The relation between these two structures is discussed.
	Reference	(Z. Naturforsch. 53b, 1—4 [1998]; eingegangen am 23. Oktober 1997)
	Published	1998
	Keywords	Copper, Lanthanoids, Borate, Synthesis, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0001.pdf
	Identifier	ZNB-1998-53b-0001
	Volume	53

2	Author	Lanthanoid Borates, A. Wiesch, K. Bluhm	Requires cookie*
	Title	CuHo2[B20 5]2* Ein unerwarteter Strukturtyp in der Reihe der Kupferlanthanoidborate CuHo2[B20 5]2: An Unexpected Structure Type in the Series of Copper
	Abstract	Single crystals of the new compound CuHo2 [B20 5 ]2 were obtained by using a B20 3 flux technique with CuO and Ho20 3 at 1050 °C. X-ray investigations on single crystals led to the space group P 2,/c (Nr. 14) with lattice parameters a = 454.3(2); b = 726.0(4); c = 936.0(5) pm; ß = 90.77(1)°; Z = 2. The compound is isotypic to CuTb2[B20 5 ] 2 as well as to the gadolinite structure (FeY2 [BeSi05]2). The structure exhibits layer-like 2 [B20 5]4~, a two-dimensional anion consisting of edge sharing B 0 4 -tetrahedra, which form four-and eight-membered rings. The layers are connected by elongated C u06-octahedra and slightly distorted tetragonal LnOs-antiprisms.
	Reference	(Z. Naturforsch. 53b, 5—8 [1998]; eingegangen am 23. Oktober 1997)
	Published	1998
	Keywords	Copper, Holmium, Borate, Synthesis, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0005.pdf
	Identifier	ZNB-1998-53b-0005
	Volume	53

3	Author	Helical Borate, AnionA. Wiesch, K. Bluhm	Requires cookie*
	Title	Ag2Cs[B1 5 0 2 4]* Ein wasserfreies quaternäres SiIber(I)-Borat mit einem neuartigen Boratanion mit helixartigem Aufbau Ag2C s[B 150 24]: An Anhydrous Quaternary Silver(I)-Borate with a New
	Abstract	Single crystals o f Ag2C s[B ,50 24] were prepared by using a B 20 3 flux technique with Ag2C 0 3 and Cs2C 0 3 in a closed silver tube at 650 °C. X-Ray investigations led to a new crystal structure in the space group P 2 ,2 ,2 (Nr. 18) with lattice parameters a = 1778.7 (4); b = 2219.2 (4); c = 512.2 (1) pm, Z = 4. The silver atoms are part of distorted A g 0 4 tetrahedra and planar A g 0 3 units while the caesium atoms are eightfold coordinated by oxygen. The compound contains an as yet unknown borate anion [B,50 24] with twelve B 0 3-and three B 0 4 units per formula. The B 0 3 units are connected to eight cords twisted to helices which are combined via B 0 4 tetrahedra to a three dimensional framework with large tunnels occupied by the cations.
	Reference	Z. Naturforsch. 53b, 157—160 (1998); eingegangen am 23. Oktober 1997
	Published	1998
	Keywords	Silver, Caesium, Borate, Synthesis, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0157.pdf
	Identifier	ZNB-1998-53b-0157
	Volume	53