Effects of tetrahedral isomorphic substitution on the IR spectra of synthetic fluorine micas
Effects of tetrahedral isomorphic substitution on the IR spectra of synthetic fluorine micas
复制标题
四面体同构取代对合成氟云母红外光谱的影响
DOI：
10.1180/claymin.1990.025.2.08
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发表时间：
1990
期刊：
影响因子：
1.5
通讯作者：
N. Takusagawa
中科院分区：
文献类型：
--
作者：
K. Kitajima;N. Takusagawa
通过比较带云母KMg 2 Li（Si 4 O 10）F 2与Ga、Al、B或Ge取代四面体位置的Si的类似物的红外光谱，论证了四面体同晶取代对氟云母红外光谱的影响。e11带随四面体位取代阳离子含量的增加而向低频移动，而a11和a12带则向高频移动。线性关系被发现之间的a1 - 2的频带频率和四面体取代的程度。α 1 - 2带的位移量与取代阳离子的种类有关，按Ga > Al > Ge > B的顺序减小，并与取代阳离子的场强z1·z2/r2 M-O密切相关。这意味着取代阳离子的极化能力对Si-O伸缩振动有明显的影响。
Abstract Effects of tetrahedral isomorphic substitution on the IR spectra of fluorine micas were demonstrated by comparing the spectrum of taeniolite KMg2Li(Si4O10)F2 with those of the substituted analogues, in which Ga, Al, B or Ge substituted for Si in tetrahedral sites. The e1 1 bands move towards lower frequencies as the content of substituted cation in tetrahedral site increases, whereas The a1 1 and a1 2 bands moves towards higher frequencies. Linear relationships were found between a1 2 the band frequency and the extent of tetrahedral substitutions. The magnitude of shifts per molar substitution for the a1 2 bands is dependent on the species of substituted cation and decreases in the order Ga > Al > Ge > B, showing an intimate correlation with the field strength z1·z2/r2 M–O of the substituted cations. This implies that the polarizing power of the substituted cations has a pronounced effect on the Si-O stretching vibrations.