Optical and EPR spectra of Ti3+ in lamprophyllite from Kola Peninsula, Russia

被引：2

作者：

Reddy, BJ ^{[1
]}

Yamauchi, J

Reddy, YP

Ravikumar, RVSSN

Chandrasekhar, AV

Venkataramanaiah, M

机构：

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

[2] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan

[3] Sri Venkateswara Degree Coll, Dept Phys, Cuddapah 516003, India

来源：

NEUES JAHRBUCH FUR MINERALOGIE-MONATSHEFTE | 2002年 / 03期

关键词：

lamprophyllite; optical; EPR; Ti3+ ion and Fe3+ ion;

D O I：

10.1127/0028-3649/2002/2002-0138

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

Optical and EPR studies on lamprophyllite, originated from Kola Peninsula, Russia are presented. Optical absorption spectrum of the sample consists of three broad bands at 1460, 1140 and 840 nm due to V, ion in distorted octahedral crystal field. The parameters evaluated from the observed data are Dq = 877, Ds = -1426 and Dt = 1525 cm(-1), which suggest the presence of Ti3+ in the mineral in axially elongated octahedral coordination. The broad unresolved EPR spectrum with g = 1.996 is due to Ti3+ and two weak signals observed at liquid nitrogen temperature in the low magnetic field with g values 2.648 and 3.473 may indicate the presence of Fe3+ as impurity.

引用

页码：138 / 144

页数：7

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