Rare, light and fragile with tabular or columnar crystals. A monoclinic mineral with a framework silicate structure. Its color is creamy to white and sometimes to more rarely pinkish. It has a thermal expansion coefficient lower than almost any other inorganic or organic filler. It is found in granite pegmatites, locally constituting an ore of lithium.

Typical Chemical Properties Available:

• Option A: SiO2= *7%, Al2O3= *7.5%, and Li2O= 4.5%
• Option B: SiO2= *7.2%,Al2O3 = *8.8% and Li2O= *1.8% and Other alkalis= 0.5%

Typical Physical Properties Available:

• Sintered pieces, targets, and powder
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