Synthesis and crystal structure of Ca9Cu1.5(PO4)7 and reinvestigation of Ca9.5Cu(PO4)7

被引：35

作者：

Belik, AA ^{[1
]}

Yanov, OV ^{[1
]}

Lazoryak, BI ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia

来源：

MATERIALS RESEARCH BULLETIN | 2001年 / 36卷 / 10期

基金：

俄罗斯基础研究基金会;

关键词：

inorganic compounds; chemical synthesis; X-ray diffraction; crystal structure;

D O I：

10.1016/S0025-5408(01)00666-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ca9Cu1.5(PO4)(7) was synthesized by the solid-state method at 1273 K followed by quenching in air. Crystal structure of Ca9Cu1.5(PO4)(7) was refined by the Rietveld method: space group R3c, a = 10.3379(1) Angstrom, c = 37.1898(3) Angstrom, Z = 6 with R-wp = 4.87%, R-p = 3.67%, S = 1.58, R-I = 2.42%, R-F = 1.07%. The structure of Ca9Cu1.5(PO4)(7) is isotypic with beta -Ca-3(PO4)(2) and Ca9.5Cu(PO4)(7). The M(5) site is fully occupied, and the M(4) site is half occupied by copper canons. The M(1)-M(3) sites are occupied by calcium canons. Copper canons in the M(4) site are displaced from the threefold axis due to long distances M(4)-O. Reinvestigation of crystal structure of Ca9.5Cu(PO4)(7) showed that the M(5) site is occupied by 0.79(1)Cu2+ + 0.21Ca(2+), and other copper canons locate in the M(4) site. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1863 / 1871

页数：9

共 27 条

[11]

Izumi F., 2000, RIGAKU J, V17, P34

[12] Synthesis and crystal structure of calcium copper phosphate, s-Ca19Cu2(PO4)(14) [J].

Khan, N ;

Morozov, VA ;

Khasanov, SS ;

Lazoryak, BI .

MATERIALS RESEARCH BULLETIN, 1997, 32 (09) :1211-1220

[13]

Lazoryak B. I., 1996, RUSS CHEM REV, V65, DOI DOI 10.1070/RC1996V065N04ABEH000211

[14] Preparation, structure determination, and redox characteristics of new calcium copper phosphates [J].

Lazoryak, BI ;

Khan, N ;

Morozov, VA ;

Belik, AA ;

Khasanov, SS .

JOURNAL OF SOLID STATE CHEMISTRY, 1999, 145 (01) :345-355

[15] Crystal structures and characterization of Ca9Fe(PO4)(7) and Ca9FeH0.9(PO4)(7) [J].

Lazoryak, BI ;

Morozov, VA ;

Belik, AA ;

Khasanov, SS ;

Shekhtman, VS .

JOURNAL OF SOLID STATE CHEMISTRY, 1996, 122 (01) :15-21

[16] Influence of preparation method on catalytic properties of mixed calcium-cobalt [J].

Legrouri, A ;

Romdhane, SS ;

Lenzi, J ;

Lenzi, M ;

Bonel, G .

JOURNAL OF MATERIALS SCIENCE, 1996, 31 (09) :2469-2473

[17] ON A NEW HYDROGENATED CU(I) NASICON-TYPE PHOSPHATE H0.5CUOI.5ZR2(PO4)3 [J].

LEPOLLES, G ;

ELJAZOULI, A ;

OLAZCUAGA, R ;

DANCE, JM ;

LEFLEM, G ;

HAGENMULLER, P .

MATERIALS RESEARCH BULLETIN, 1987, 22 (09) :1171-1177

[18]

NORD AG, 1983, NEUES JB MINER MONAT, P489

[19] LINE PROFILES OF NEUTRON POWDER-DIFFRACTION PEAKS FOR STRUCTURE REFINEMENT [J].

RIETVELD, HM .

ACTA CRYSTALLOGRAPHICA, 1967, 22 :151-&

[20] CRYSTALLOGRAPHIC STUDIES OF ROLE OF MG AS A STABILIZING IMPURITY IN BETA-CA3(PO4)2 .2. REFINEMENT OF MG-CONTAINING BETA-CA3(PO4)2 [J].

SCHROEDER, LW ;

DICKENS, B ;

BROWN, WE .

JOURNAL OF SOLID STATE CHEMISTRY, 1977, 22 (03) :253-262

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