Ca
Mg
Fe
Si
O
H
Ball and Stick Stick Spacefill Polyhedral
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Tremolite

Tremolite, Ca2(Mg,Fe2+)5Si8O22(OH)2, is a common inosilicate (chain silicate) mineral of the amphibole group. Its crystal system is monoclinic with long bladed or prismatic crystal habit. It is known to crystallize in the asbestiform habit and the fibrous form of temolite is one of six recognized types of asbestos. Tremolite is sometimes found as a contaminant in talc, vermiculite (as in Libby, Montana) and crysolite (itself as an asbestos mineral).

Highlighting Features

Silicon (Si) atoms
Calcium (Ca) atoms
Magnesium (mg) atoms
Oxygen (O) atoms
Tetrahedrally-coordinated silicon atom
Silicon double-chain structural unit
Single unit cell
All atoms

Distribution

Tremolite is found in metamorphosed limestone.

Sueno, S., M. Cameron, J.J. Papike, and C.T Prewitt. 1973.The high temperature crystal chemistry of tremolite T=400 C. American Mineralogist. 58:649-664.