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Anatase is always found as small, isolated and sharply developed crystals, and like rutile, a more commonly occurring modification of titanium dioxide, it crystallizes in the tetragonal system; but, although the degree of symmetry is the same for both, there is no relation between the interfacial angles of the two minerals, except, of course, in the prism-zone of 45¡ã and 90¡ã. The common pyramid of anatase, parallel to the faces of which there are perfect cleavages, has an angle over the polar edge of 82¡ã9', the corresponding angle of rutile being 56¡ã521/2;'. »®Ïß²¿·Ö¸ÃÔõôÀí½â£¬Çë²»ÁßÖ¸µã£¡ [ Last edited by zongbaoyu on 2009-12-4 at 15:36 ] |
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2Â¥2009-12-04 16:22:52
zongbaoyu(½ð±Ò+7):лл²ÎÓë 2010-03-05 20:58
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4Â¥2009-12-04 19:15:09
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5Â¥2009-12-05 15:25:34













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