 | | Book (edition) | | to the chemical formula, allegiance to a mineral group, symmetry and crystal structure as well as the strongest...chemical formula, structure (crystal system, space group, and unit cell dimensions), and at least some other...site occupancy. The Sb members of the tennantite group (2.G) will serve as a good example: tetrahedrite...registered in this book (e.g. in the amphibole group). For more detailed information see "Dana's System...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g. |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Institut fur Mineralogie der Universitat Wien, Austria. Michael Zolensky: Lyndon Johnson Space Center...Species containing more than one anion or anion group may be assigned to a separate class or may be assigned...specifies the atomic (cation to anion, or to anion group) ratio for the mineral. This and the remaining numbers...appropriate Dana number. When recognized, membership in a group is noted. Occasionally, the phrase “an inadequately...internally contradictory. 5A. Groups The term group refers to an aggregate or multiple (usually three |  | | Book (edition) | | mark the degree of symmetry which belongs to each group of forms, and which is in fact the fundamental distinction...that in group 1 the crystals are formed or developed alike in all three axial directions ; in group 2 the...in the several lateral directions, but unand in group 3 the crystals are formed unlike in all three like...species. In f 229, of anorthite, of the feldspar group, the form is very similar to those of the monoclinic...octahedron, it is especially common with the spinel group of minerals similarly, f. 269, a more complex form |  | | Book (edition) | | mark the degree of symmetry which belongs to each group of forms, and which is in fact the fundamental distinction...study of these different systems will show that in group 1 1. : ; : A the crystals are formed or developed...developed alike in all three axial directions; in group 2 the development is alike in the several lateral...lateral directions, but unlike vertically ; and in group 3 the crystals are formed unlike in all three These...species. In f 229, of anorthite, of the feldspar group, the form is very similar to those of the monoclinic |  | | Book (edition) | | that in group 1 the crystals are formed or developed alike in all three axial directions; in group 2 the...species. In f. 229, of anorthite, of the feldspar group, the form is very similar to those of the monoclinic...octahedron, it is especialh'' common with the spinel group of minerals similarly, f. 269, a more complex form...Both resemble rhombohedral forms and are common in garnet and zinc blende. When lengthened in the direction...Similar occurrences are those of trapezohedrons of garnet, where the latter is a mere shell, enclosing calcite |  | | Book (edition) | | belongs to a broader group of related minerals, the name adopted for the group is given beneath the formula...editions of this book. Brieny. within each anionic group the minerals arc arranged in order determined by...those of the alkaline earths, etc. Within each group the minerals are tabulated with increasing anion...7.3 AbernalhJile. K(U00As0,.4H�O. Meta-autunite group. M.E. Thompson. B. Ingram. and E.B. G ross ( 1 956)...p. 579. Abkhazite. syn. of tremolite. Amphibole group. N.E. E fremov ( 1 940 for 1 938) Trans. 111st. |
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