In:
Zeitschrift für Kristallographie - Crystalline Materials, Walter de Gruyter GmbH, Vol. 154, No. 1-2 ( 1981-1-1), p. 115-126
Abstract:
As temperature increases, beryllium polyphosphate BeP 2 O 6 III undergoes a displacive transformation at 96°C from a = 14.062(4), b = 8.629(2), c = 7.091(1)Å, β = 90.80(2)°, Z = 8, P 2 1 , to a = 9.968(4), b = 10.080(4), c = 8.692(2)Å, Z = 8, C 222 1 . The crystal structure of the orthorhombic high temperature phase has been determined from 599 intensities photographically recorded at 119°C and refined to R = 0.113. Corner sharing [PO 4 ] tetrahedra form strongly folded chains parallel to the 8.6 Å axis with eight tetrahedra in the repeat unit. These chains are joined by [BeO 4 ] tetrahedra to give a three-dimensional framework with the same topology as silica K (keatite).
Type of Medium:
Online Resource
ISSN:
2194-4946
,
2196-7105
DOI:
10.1524/zkri.1981.154.1-2.115
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
1981
SSG:
13
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