SYNTHESIS AND CRYSTAL-STRUCTURE OF MANGANESE BORATE OXIDES - MNFE(BO3)O AND MNAL0.5Y0.5(BO3)O

Authors
UTZOLINO A BLUHM K
Citation
A. Utzolino et K. Bluhm, SYNTHESIS AND CRYSTAL-STRUCTURE OF MANGANESE BORATE OXIDES - MNFE(BO3)O AND MNAL0.5Y0.5(BO3)O, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 50(8), 1995, pp. 1146-1150
Citations number
15
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur Naturforschung. B, A journal of chemical sciences → ACNP
ISSN journal
09320776
Volume
50
Issue
8
Year of publication
1995
Pages
1146 - 1150
Database
ISI
SICI code
0932-0776(1995)50:8<1146:SACOMB>2.0.ZU;2-1
Abstract
Single crystals of the compounds MnFe(BO3)O (I) and MnAl0.5Y0.5(BO3)O (II), were obtained by a B2O3 flux technique. I crystallizes with orth orhombic symmetry, space group D-2h(16)-Pnma (Nr.62), a = 939.92; b = 319.41; c = 939.11 pm: Z = 4 and II with monoclinic symmetry, space gr oup C-2h(5)-P2(1)/n (Nr. 14): a = 325.6: b = 955.1; c = 929.2 pm, beta = 90.70 degrees; Z = 4. I is isotypic to the mineral Warwickite, whil e II is a distorded variant of this structure. All metal ions are octa hedrally coordinated. Both structures contain isolated, trigonal plana r BO3 units and oxygen atoms that are not coordinated to boron.