 | William Hallowes Miller - Crystallography - 1839 - 190 pages
...symbol {hkl} will be used to express the form bounded by the face (hk I) and its coexistent faces. The " holohedral forms " of any system are those which...of the latter omitted according to a certain law. The figure bounded by the faces of any number of forms, is called a " combination" of those forms.... | |
 | John Joseph Griffin - Crystallography - 1841 - 548 pages
...Tetartohedral or Quarter Forms; while the original forms are called Homohedral Forms." — Elemmte der Krystallographie, p. 5. 255. Professor MILLER'S...certain law." — Treatise on Crystallography, page 21. 256. Both of these sets of definitions leave the matter entirely open for subsequent explanation,... | |
 | John Joseph Griffin - Crystallography - 1841 - 536 pages
...forms are called Homohedral Forms." — Elemente der Krystallographie, p. 5. 255. Professor MILIEU'S account of these forms is this: — " The ' Holohedral...certain law." — Treatise on Crystallography, page 21. In the present case, however, I propose to treat this subject with some detail under the general... | |
 | William Phillips - Mineralogy - 1852 - 732 pages
...crystallization, are required to coexist with it. A form will be denoted by the symbol of any one of its faces. The 'holohedral forms- of any system are those which...of the latter omitted according to a certain law. The figure bounded by the faces of any number of forms is called a 'combination- of those forms. 31.... | |
 | William Allen Miller - 1855 - 458 pages
...OF CRYSTALS. FIG. 45Homo/1edral, or Holohedral forms, arc those which, like the cube and octahedron, possess the highest degree of symmetry of which the system admits. Hemihedral forms, on the other hand, are those which may be derived from a holohedral form, as the tetrahedron is from... | |
 | William Allen Miller - Chemistry - 1855 - 452 pages
...CLASSIFICATION OF CRYSTALS. FIG. Homohedral, or Holohedral forms, are those which, like the cube and octahedron, possess the highest degree of symmetry of which the system admits. Hemihedral forms, on the other hand, are those which may be derived from a holohedral form, as the tetrahedron is from... | |
 | William James Rolfe, Joseph Anthony Gillet - Chemistry - 1870 - 476 pages
...to the Dodecahedron. Homohedral, or Holohedral forms, are those which, like the cube and octohedron, possess the highest degree of symmetry of which the system admits. Hemihedral forms, on the other hand, are those which may be derived from a holohedral form, as the tetrahedron is from... | |
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MILLER'S account of these forms is this: — " The ' Holohedral Forms' of any system are those which possess the highest degree of symmetry of which the system admits. ' Hemihedral Forms ' are those which may be derived from a Holohedral Form, by supposing... 