[Chemical composition] spodumene more stable chemical composition, may contain a rare element, a rare earth element mixed into the composition.
[Crystal structure] monoclinic system; 
There are also data that the space group is C2/c; a 0 =0.946 nm, b 0 =0.839 nm, c 0 =0.522 nm; β=110°11′; Z=4. The crystal structure is outlined in the Pyroxene family. Spodumene (ie, alpha spodumene) has two other homomorphic multi-image variants; beta spodumene is tetragonal, and has the same structure as kaimite (also called heavy quartz); gamma spodumene is hexagonal Department, the same structure as beta quartz.
[Form] It is often columnar crystal, and the column surface often has vertical lines. Sometimes huge crystals (up to 16m) are visible. Double crystal (100) is generated. The aggregate is in the form of a column (column) of rods and rods, and can also be densely clad.
[Physical properties] grayish white, smoky gray, grayish green. Emerald-colored spodumene is called emerald spodumene, which is caused by the inclusion of Cr in the composition. The composition contains Mn in purple and purple spodumene; the glass is lustrous, and the cleavage surface is slightly pearly. {110}The cleavage is complete, with an angle of 87°; with {100}, {010} split. Hardness 6.5 to 7. The relative density is 3.03 to 3.23.
[genesis and occurrence] is a characteristic mineral in the rich Li granite pegmatite.
[identification characteristics] color, crystal form and its appearance. The blown flame is expanded and dyed into a light red (Li). After being melted with CaF 2 + KHSO 4 , the flame is dyed into a bright red (Li).
[Main use] Used together with lithium mica as a raw material for extracting Li. Li is used in atomic industry, medicine, fireworks, photography, glass, and roentgen photography. Transparent and beautiful color can be used as a gem . In addition, like lithium mica and eucryptite, it has a negative expansion property which is not found in general raw materials. Therefore, it can be made into special ceramics and glass-ceramics with a coefficient of expansion close to zero at a high temperature together with other minerals of positive expansion. The thermal shock resistance and mechanical strength of the product.
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