Assessment of the molecular structure of the borate mineral boracite Mg3B7O13Cl using vibrational spectroscopy

被引：5

作者：

Frost, Ray L. ^{[1
]}

Xi, Yunfei ^{[1
]}

Scholz, Ricardo ^{[2
]}

机构：

[1] Queensland Univ Technol, Fac Sci & Engn, Sch Chem Phys & Mech Engn, Brisbane, Qld 4001, Australia

[2] Univ Fed Ouro Preto, Sch Mines, Dept Geol, BR-3540000 Ouro Preto, MG, Brazil

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2012年 / 96卷

基金：

澳大利亚研究理事会;

关键词：

Raman spectroscopy; Borate; Boracite; Infrared; Evaporite; FERROELECTRIC PHASE-TRANSITION; CHLORINE BORACITE; CRYSTAL-STRUCTURE; RAMAN-SPECTRUM; FT-IR; INFRARED-SPECTRA; GLASSES; DOMAINS; LEAD; EPR;

D O I：

10.1016/j.saa.2012.07.115

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Boracite is a magnesium borate mineral with formula: Mg3B7O13Cl and occurs as blue green, colorless, gray, yellow to white crystals in the orthorhombic - pyramidal crystal system. An intense Raman band at 1009 cm(-1) was assigned to the BO stretching vibration of the B7O13 units. Raman bands at 1121, 1136, 1143 cm(-1) are attributed to the in-plane bending vibrations of trigonal boron. Four sharp Raman bands observed at 415, 494, 621 and 671 cm(-1) are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3405 and 3494 cm(-1), thus indicating that some Cl anions have been replaced with OH units. The molecular structure of a natural boracite has been assessed by using vibrational spectroscopy. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：946 / 951

页数：6

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