A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 220
prisms, and 3 and 4 doubly oblique octahedrons. THE RHOMBOHEDRAL SYSTEM has four axes, three of which are equal in the sameplane, and inclined at angles of 60°; the fourth, whichis the principal axis, is perpendicular to all. In the figure {Fig. 176), 1 is the regular six-sided Fig. 176. <vjJLJX … prism; 2. the dodecahedron; 3. Mhombohedron; 4.another dodecahedron. It often happens, owing to a change in the deposit ofnew matter on a crystal while forming, that other fig-ures than the proper one is produced; thus the cubemay pass into the octahedron, as shown in Fig. 177. The effect may…
Chemistry · Physics
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