波伏棱(Povlen)型羟基纤蛇纹石的谱学研究
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A Spectroscopic Study of Povlen Type Hydroxyl-Chrysotile
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    摘要:

    波伏棱型羟基纤蛇纹石是波伏棱型纤蛇纹石矿物的新变种,本文报导它的吸收光谱、红外光谱、穆斯堡尔谱、电子顺磁共振谱和核磁共振谱。 研究表明,吸收光谱是Fe(3+ )和Fe(2+ )的晶场跃迁以及Fe(2 +)→Fe(3+ )的荷移跃迁引起的;红外光谱是OH和Si-O的伸缩振动、OH转动以及Mg-O和Si-O的弯曲振动引起的;穆斯堡尔谱是Fe(2+)(八面体)、Fe(3+)(八面体)和Fe(3+ )(四面体)引起的;电子顺磁共振谱是Mn(2+ )(八面体)、Fe(3+ )(八面体)和Fe(3+ )(四面体)引起的;核磁共振谱是管道水,镁八面体和硅氧四面体上的OH引起的;矿物加热到825℃时,结构开始破坏并出现镁橄榄石相。 此外,本文还解释了该蛇纹石颜色的本质,阐明了上述过渡金属离子和OH在该矿物中的结构环境。

    Abstract:

    Povlen type hydroxyl-chrysotile is a new variety of Povlen type chrysotile, whose absorption, infrared, Mossbauer, EPR and NMR spectra are reported in this paper. Experimentation shows that the absorption spectra are caused by crystal-field transitions of Fe3+ and Fe2+ ions and charge-transfer transition of Fe3+→Fe3+, the infrared spectra by stretching vibrations of OH and Si-O, rotation of OH and bending vibrations of Mg-O and Si-O, the Mossbauer spectra by Fe2+octa.,Fe3+octa., and Fe3+tetra., the EPR spectra by Mno2+octa., Fe3+octa and Fe3+tetra.,and the NMR spectra by pipe water in fibre and OH on Mg-octahedra and Si-0 tetrahedra. It is also demonstrated that, when heated to 825℃,the structure was destroyed and forsterite phase formed. In addition, this paper interprets the color of Povlen type hydroxyl-chryso- tile and describes structural environments of the above transitional metal ions and OH in this mineral.

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朱和宝,江绍英,邵涵如,吴卫芳,1989,波伏棱(Povlen)型羟基纤蛇纹石的谱学研究[J].岩石矿物学杂志,8(1):43~53. Zhu Hebao,1989,A Spectroscopic Study of Povlen Type Hydroxyl-Chrysotile[J]. Acta Petrologica et Mineralogica,8(1):43~53.

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