SYNTHESIS AND X-RAY CHARACTERIZATION OF 2 NEW COMPOUNDS WITH LUDWIGITE-STRUCTURE - CO5SN(BO3)(2)O-4 AND CO5MN(BO3)(2)O-4

Authors
UTZOLINO A BLUHM K
Citation
A. Utzolino et K. Bluhm, SYNTHESIS AND X-RAY CHARACTERIZATION OF 2 NEW COMPOUNDS WITH LUDWIGITE-STRUCTURE - CO5SN(BO3)(2)O-4 AND CO5MN(BO3)(2)O-4, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 51(3), 1996, pp. 305-308
Citations number
28
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur Naturforschung. B, A journal of chemical sciences → ACNP
ISSN journal
09320776
Volume
51
Issue
3
Year of publication
1996
Pages
305 - 308
Database
ISI
SICI code
0932-0776(1996)51:3<305:SAXCO2>2.0.ZU;2-F
Abstract
The compounds Co5Sn(BO3)(2)O-4 (I) and Co5Mn(BO3)(2)O-4 (II) were prep ared by using a B2O3 flux technique. Single crystals were investigated by X-ray diffraction and showed orthorhombic symmetry, space group D- 2h(9) Pbam (No. 55), I a = 944.4; b = 1233.8; c = 310.5 pm; Z = 2 and II a = 925.07; b = 1241.67; c = 305.24 pm; Z = 2. Both compounds are i sotypic to the mineral Ludwigite. All metal point positions show an oc tahedral oxygen coordination. Co2+ and M(4+) (M = Sn or Mn) occupy one point position statistically. Both structures contain isolated, trigo nal planar BO3 units and oxygen atoms that are not coordinated to boro n.