The blue allotropic form of CO2+ :Na2COP2O7:: optical and magnetic properties, correlation with crystallographic data

被引：32

作者：

Beaury, L

Derouet, J

Binet, L

Sanz, F

Ruiz-Valero, C

机构：

[1] ENSCP, CNRS, UMR 7574, Lab Chim Appl Etat Solide, F-75231 Paris 05, France

[2] CSIC, ICMM, Madrid 28049, Spain

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2004年 / 177卷 / 4-5期

关键词：

crystal fields optical absorption; EPR; sodium cobalt diphosphate; magnetic susceptibility;

D O I：

10.1016/j.jssc.2003.11.028

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Na2CoP2O7 is found in two allotropic forms. The first one is rose and belongs to the triclinic crystallographic system. The second one is blue and described in the orthorhombic system, space group Pna2(1), No. 33, with cell parameters a = 15.378(6) Angstrom, b = 10.271(4) Angstrom, c = 7.713(2) Angstrom and Z = 8. A recent work showed that the orthorhombic phase could be considered as tetragonal: space group P4(2)/mnm, No. 136 with a = 7.706(1) Angstrom and b = 10.301(2) Angstrom and Z = 4. The optical and magnetic properties, particularly the EPR spectrum, of the divalent cobalt ion and their phenomenological simulation were of considerable help to complement the study and allowed us to specify the real structure. (C) 2003 Elsevier Inc. All rights reserved.

引用

页码：1437 / 1443

页数：7

共 24 条

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