書誌事項
- タイトル別名
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- THE CRYSTAL STRUCTURE OF MUSCOVITE DEHYDROXYLATE
- 公開日
- 1974
- DOI
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- 10.2465/ganko1941.69.381
- 公開者
- 一般社団法人 日本鉱物科学会
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説明
The crystal structure of muscovite dehydroxylate has been determined by X-ray single crystal analysis. The muscovite dehydroxylate was prepared by heating 2M1 muscovite at 900°C for 30 minutes. The dehydroxylate has the cell dimensions, a=5.244±0.008, b=9.202± 0.016, c=20.233±0.021 (Å), β =95°50′±06′; and the space group C2/c. Integrating Weissenberg photographs were taken using the multiple-film technique and intensities of 415 reflections were measured mainly by microphotometer. An examination was made by three dimensional Fourier methods of three possible models for the structure of the dehydroxylate. The result revealed that one of them was successfully refined to R=14.2% by full-matrix least-squares calculations. The R value of the final structure is considered to be low enough since the dehydroxylate gave diffused and streaked reflections caused by the structural disorders. In the structure, Al atoms are coordinated by five oxygen atoms. The change in coordination from six to five gives rise to a very short distance of dehydroxylate 1.69Å between Al and the oxygen atom which is coordinated to two Al atoms. The form of the five-fold coordination groups mentioned above is approximately a trigonal bipyramid and is quite similar to that found in pyrophyllite dehydroxylate proposed by Wardle and Brindley (1972).<br> Reaction mechanism of the dehydroxylation of muscovite was discussed in connection with the crystal structure of muscovite and its dehydroxylate.
収録刊行物
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- 岩石鉱物鉱床学会誌
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岩石鉱物鉱床学会誌 69 (11), 381-389, 1974
一般社団法人 日本鉱物科学会
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詳細情報 詳細情報について
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- CRID
- 1390001206216632576
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- NII論文ID
- 130003884226
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- ISSN
- 18830765
- 00214825
- http://id.crossref.org/issn/03610128
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
