STRUCTURE OF A HIGH-TEMPERATURE MODIFICAT ION OF CALCIUMULTRAPHOSPHATE, CAP4O11, AND ITS CRYSTALLOGRAPHIC ORIENTATION RELATION WITH RESPECTTO THE ROOM-TEMPERATURE PHASE

Authors
SCHNEIDER M BUSCHMANN J LUGER P
Citation
M. Schneider et al., STRUCTURE OF A HIGH-TEMPERATURE MODIFICAT ION OF CALCIUMULTRAPHOSPHATE, CAP4O11, AND ITS CRYSTALLOGRAPHIC ORIENTATION RELATION WITH RESPECTTO THE ROOM-TEMPERATURE PHASE, Zeitschrift fur anorganische und allgemeine Chemie, 620(4), 1994, pp. 766-770
Citations number
12
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur anorganische und allgemeine Chemie
ISSN journal
00442313 → ACNP
Volume
620
Issue
4
Year of publication
1994
Pages
766 - 770
Database
ISI
SICI code
0044-2313(1994)620:4<766:SOAHMI>2.0.ZU;2-#
Abstract
The title compound was obtained by heating a mixture of CaCO3, P4O10 i n excess and H3PO4 in excess as well to 500-degrees-C and annealing fo r 10 days. The Calciumultraphosphate, CaP4O11 transforms at 85-degrees -C in a hot nitrogen gas stream into a second modification with orthor hombic space group (Aba2), the structure of which was determined: a = 12.683 angstrom, b = 12.090 angstrom, c = 12.627 angstrom, Z = 8, laye r structure, R = 0.034. The crystallographic orientation relation betw een the two phases of CaP4O11 was determined.