| | 1 | Author
| Silke Busche, K. Arsten Bluhm | Requires cookie* | | | Title
| Synthese und Kristallstruktur von Dibariumzink-bis(cyclotriborat) Ba2Zn(B30 6)2  | | | | Abstract
| Single crystals of the new compound Ba2Zn(B30 6)2 were obtained by using a B20 3 flux technique. They crystallize in an as yet unknown structure type. X-ray investigations led to space group Cj'-Pl (Nr.2) with lattice parameters a = 715.5(2), b = 720.5(2), c = 1178.9(4), a = 78.96(2)°, /3 = 85.45(2)°, j = 60.12(1)°, Z = 2. The structure is characterized by iso lated (B30 6)3_-rings and contains two ninefold coordinated Ba-sites. Zn2+ is tetrahedrally coordinated by oxygen. The relation to the crystal structures of high-temperature BaB20 4 and Ba2Ca(B30 6)2 is discussed. | | | |
Reference
| Z. Naturforsch. 51b, 309—312 (1996); eingegangen am 26. September 1995 | | | |
Published
| 1996 | | | |
Keywords
| Barium, Zinc, Borate, Crystal Structure | | | |
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| default:Reihe_B/51/ZNB-1996-51b-0309.pdf | | | | Identifier
| ZNB-1996-51b-0309 | | | | Volume
| 51 | |
| 2 | Author
| Park, K. Arsten Bluhm | Requires cookie* | | | Title
| Pb6(A s0 4) | | | | Abstract
| [B (A s04)4] -ein neuartiger Kristallstrukturtyp im System Pb0 /B2 0 3 /As2 0 5 mit einem Beitrag über P b(B A s05) Pb6(A s 0 4)[B (A s 0 4)4] -a New Crystal Structure Type in the System P b 0 /B 20 3/A s20 3 w ith R em arks about P b (B A s0 5) C heong- Single crystals of Pb6(A s04)[B(As04)4] (I) and Pb(BAs05) (II) were obtained by melting B->03, As20 5 and PbO at 800 °C. X-ray investigation led to the space group (I): S4 -P4 (Nr. 81) with a = 715.4(1), c = 976.2(3) pm, Z = 1 and (II): C | -P3, (Nr. 144) with a = 712.2(1), c = 693.5(2) pm, Z = 3. While (II) is isotypic to the Stillwellite structure, Pb^(As04)[B(As04)4] represents a completely novel type of crystal structure. Boron and arsenic are tetrahedrally coordinated by oxygen. These polyhedra form two kinds of isolated anions: A s04'~ and B(A s04)49_. Lead is eightfold coordinated by oxygen. | | | |
Reference
| Z. Naturforsch. 51b, 313—318 (1996); eingegangen am 16. Oktober 1995 | | | |
Published
| 1996 | | | |
Keywords
| Lead, Arsenic, Borate, Synthesis, Crystal Structure | | | |
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| default:Reihe_B/51/ZNB-1996-51b-0313.pdf | | | | Identifier
| ZNB-1996-51b-0313 | | | | Volume
| 51 | |
| 3 | Author
| Silke Busche, K. Arsten Bluhm | Requires cookie* | | | Title
| Ba2KZn3(B306)(B60 13) | | | | Abstract
| Single crystals of the new compound Ba2KZn3(B30 6)(B60 | 3) were obtained by using a B20 3 flux technique; they crystallize in an as yet unknown structure type. X-ray investigations led to the space group C '-P l (Nr.2) with lattice parameters a = 705.2(2), b = 712.5(2), c = 1880.3(6), a = 93.43(3)°, ß = 90.72(2)°, 7 = 119.57(2)°, Z = 2. The structure contains (B30 6)3~-rings and a new discrete (B60 13)8~ anion, which is composed of two B 0 4 and two B20 5 units. Zn-+ is tetrahedrally coordinated by oxygen and two out of three tenfold coordinated Ba-sites are statistically occupied by Ba2+ and K+. | | | |
Reference
| Z. Naturforsch. 51b, 319—324 (1996); eingegangen am 26. September 1995 | | | |
Published
| 1996 | | | |
Keywords
| Barium, Potassium, Zinc, Borate, Crystal Structure | | | |
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| default:Reihe_B/51/ZNB-1996-51b-0319.pdf | | | | Identifier
| ZNB-1996-51b-0319 | | | | Volume
| 51 | |
| 4 | 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 | | | |
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| default:Reihe_B/51/ZNB-1996-51b-0671.pdf | | | | Identifier
| ZNB-1996-51b-0671 | | | | Volume
| 51 | |
| 5 | 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 | | | |
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| default:Reihe_B/51/ZNB-1996-51b-0677.pdf | | | | Identifier
| ZNB-1996-51b-0677 | | | | Volume
| 51 | |
| 6 | 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 | | | |
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| default:Reihe_B/51/ZNB-1996-51b-0722.pdf | | | | Identifier
| ZNB-1996-51b-0722 | | | | Volume
| 51 | |
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