Optical and EPR studies of iron bearing phosphate minerals: satterlyite and gormanite from Yukon Territory, Canada

被引：17

作者：

Chandrasekhar, AV

Ramanaiah, MV

Reddy, BJ

Reddy, YP

Rao, PS

Ravikumar, RVSSN ^{[1
]}

机构：

[1] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India

[2] Pondicherry Univ, Dept Chem, Pondicherry, India

[3] Yamaguchi Univ, Dept Adv Mat Sci & Engn, Ube, Yamaguchi 7558611, Japan

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2003年 / 59卷 / 09期

关键词：

satterlyite; gormanite; crystal field; EPR; optical absorption;

D O I：

10.1016/S1386-1425(03)00017-9

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The iron phosphate minerals satterlyite and gormanite have been investigated by EPR and optical absorption studies. The optical results indicate the presence of ferrous and ferric ions in both minerals. In gormanite the site symmetry of Fe(III) is near octahedral whereas in satterlyite it is tetragonally distorted. On the other hand, the Fe(II) ions are in tetragonally distorted octahedral site in both minerals. In satterlyite the EPR results indicate the presence of the ferric ion in a tetragonally distorted state together with a small percentage of Mn(II). Crystal field (Dq) and interelectronic parameters (B and C) are evaluated. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：2115 / 2121

页数：7

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