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zongbaoyu捐助贵宾 (著名写手)
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关于二氧化钛两种结构的说明
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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° and 90°. The common pyramid of anatase, parallel to the faces of which there are perfect cleavages, has an angle over the polar edge of 82°9', the corresponding angle of rutile being 56°521/2;'. 划线部分该怎么理解，请不吝指点！ [ Last edited by zongbaoyu on 2009-12-4 at 15:36 ] |
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ssfei116
铁杆木虫 (著名写手)
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2楼2009-12-04 16:22:52
zongbaoyu(金币+7):谢谢参与 2010-03-05 20:58
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3楼2009-12-04 16:52:25
4楼2009-12-04 19:15:09
zongbaoyu
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5楼2009-12-05 15:25:34