Brucite, Mg(OH)2, is a member of the oxides and hydroxides family. It has a monoclinic crystal system with tabular habit. It is not an important mineral in soils, per se, but it presents a model system for a trioctahedral sheet structure that is not attached to a silicate tetrahedral sheet as in the trioctahedral phyllosilicates. Its dioctahedral corollary is gibbsite, Al(OH)3
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Brucite occurs in dolomitic limestones (metamorphosed) and can be found in theU.S., Russia and Canada.
Parise J.B., K. Leinenweber, D.J. Weidner, K. Tan, and R.B. Von Dreele. 1994. Pressure-induced H bonding: neutron diffraction study of brucite, Mg (OD)2, to 9.3 GPa. American Mineralogist 79:193-196