Fibrolite and its Relationship to Sillimanite
Fibrolite and its Relationship to Sillimanite
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纤维岩及其与硅线石的关系
DOI：
10.1038/physci235134a0
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发表时间：
1972
期刊：
影响因子：
64.8
通讯作者：
J. R. Ashworth
中科院分区：
文献类型：
--
作者：
W. E. Cameron;J. R. Ashworth
最近有人提出硅线石中存在铝硅无序和非化学计量的可能性[1 - 3]。这可以很方便地解释蓝晶石-硅线石和红柱石-硅线石这两条不变线在通常确定的位置和斜率上的差异。紊乱的主要候选者似乎是一种细粒针状硅线石，称为纤维岩。例如，Holdaway认为它是一种亚稳的、快速结晶的相，可能含有过量的硅。这种交流提供了证据，证明天然纤维岩在其排序方案或组成上与粗粒硅线石没有区别。
THE possibility of aluminium-silicon disorder and non-stoichiometry in sillimanite has been recently suggested1–3. This would conveniently explain discrepancies in the often determined position and slope of the univariant lines kyanite-sillimanite and andalusite-sillimanite. The principal candidate for disorder seems to be a fine-grained acicular variety of sillimanite known as fibrolite. Holdaway, for example, considers that it develops as a metastable, rapidly crystallizing phase, possibly containing excess silica3. This communication presents evidence that natural fibrolite does not differ in its ordering scheme, or composition, from coarser grained sillimanites.