Trembathite
Trembathite is an IMA-recognized mineral species in the halide class, with the chemical formula Mg₃B₇O₁₃Cl.
It crystallizes in the hexagonal crystal system (space group R3c). It is a member of the Boracite structural group.
Key properties: Mohs hardness 6–8; specific gravity 2.84–3.34; White streak; Vitreous luster; optically uniaxial.
IMA symbol Tba, IMA status: approved, named in 1991.
A rare component of marine evaporite borate deposits.
It is found associated with Halite, hilgardite (Salt Springs deposit, Canada).
The mineral was named to honor Dr. Lowell T. Trembath (1936–1994), Canadian mineralogist, Professor of Mineralogy, University of New Brunswick, Fredericton, Canada.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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