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Mar 15, 2019 · Name: From the Greek for luster, apparently based on the appearance of its cleavage surface. Mineral Group: Pyroxene group. Association: Orthoclase, sanidine, labradorite, olivine, leucite, amphibole, pyroxene. Contents. Chemical Properties of Augite. Physical Properties of Augite. Optical Properties of Augite.
Augite, as the most abundant pyroxene mineral, can play an important role in the composition of gabbro, basalt, diorite, and andesite. Physical Properties of Augite Chemical Classification
Characteristics. Euhedral crystal of augite from Teide (4.4 x 3.0 x 2.3 cm) Augite is a solid solution in the pyroxene group. Diopside and hedenbergite are important endmembers in augite, but augite can also contain significant aluminium, titanium, and sodium and other elements.
- Commonly as stubby prismatic crystals, also acicular, skeletal, dendritic
- Prismatic (2/m), (same H-M symbol)
- 5.5 to 6
- Monoclinic
Detailed description, properties, locality information guide about the pyroxene mineral augite. Minerals.net Complete Information Guide to Rocks, Minerals, & Gemstones
Composition: Molecular Weight = 236.35 gm. Sodium 0.97 % Na 1.31 % Na 2 O. Calcium 15.26 % Ca 21.35 % CaO. Magnesium 9.26 % Mg 15.35 % MgO. Titanium 2.03 % Ti 3.38 % TiO 2. Aluminum 4.57 % Al 8.63 % Al 2 O 3. Iron 4.73 % Fe 6.08 % FeO. Silicon 22.58 % Si 48.30 % SiO 2. Oxygen 40.62 % O. ______ ______ 100.00 % 104.40 % = TOTAL OXIDE.
Vitreous. Hardness: 5½ - 6. Specific Gravity: 3.19 - 3.56. Crystal System: Monoclinic. Member of: Clinopyroxene Subgroup > Pyroxene Group. Name: Named by Abraham G. Werner in 1792 from the Greek αυγή ("auge") for "shine" or "luster," in allusion to the appearance of its cleavage surfaces. Pyroxene Group, Clinopyroxene Subgroup.
Augite, the most common pyroxene mineral (a silicate of calcium, magnesium, iron, titanium, and aluminum). It occurs chiefly as thick, tabular crystals in basalts, gabbros, andesites, and various other dark-coloured igneous rocks. It also is a common constituent of lunar basalts and meteorites rich.
