Elements of Crystallography for Students of Chemistry Physics And Mineralogy
The book Elements of Crystallography for Students of Chemistry Physics And Mineralogy was written by author George Huntington Williams Here you can read free online of Elements of Crystallography for Students of Chemistry Physics And Mineralogy book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Elements of Crystallography for Students of Chemistry Physics And Mineralogy a good or bad book?
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They are called tetragonal trapezohedrons. Their gen- eral symbols, according to Naumann and Miller, are mPn mPn _ -r, r\lchl\ and -I, rAhkl}. A A It is evident that no other new form can result by this method of selection from any of the more special tetragonal forms, because, in each of them, the planes correspond to at least two contiguous planes of the most general form. This mode of crystallization has never been ob- served on natural minerals, but it has several repre- sentatives among or...ganic salts. Examples of these are sulphate of strychnine, sulphate of ethylendiamine, carbonate of guanidine, and diacetylphenol phtalline. 98 CRYSTALLOGRAPHY. Pyramidal Hemihedrism, The extension of alter- nate planes on the upper half of the ditetragonal pyramid, and of those directly below them on the lower half, as indicated in Fig. 146, p. 96, must pro- duce a tetragonal pyramid, which is in all respects like that of the first or second order, except in its position. While the two holohedral tetragonal pyra- mids differ 45 in their positions, this hemihedral tetragonal pyramid, called the pyramid of the third order, occupies an intermediate place, which is deter- mined by the exact parameters of the ditetragonal pyramid from which it is de- rived.
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