Pale greenish crystals of the extremely rare mineral brinrobertsite from the second known locality worldwide: Liset Eclogite Pod, Liset, Selje, Sogn og Fjordane, Norway. Analyzed specimen by EDS and X-Ray. Honouring Dr. Brin Roberts, specialist for british clay minerals in the University of London. — Photo: David Hospital · CC BY-SA 4.0
Brinrobertsite
Brinrobertsite is an IMA-recognized mineral species in the silicate class, with the chemical formula (Na,K,Ca)₀.₃(Al,Fe,Mg)₄(Si,Al)₈O₂₀(OH)₄·3.5H₂O.
It crystallizes in the monoclinic crystal system. It is a member of the Corrensite, Clay structural group.
IMA symbol Brb, IMA status: approved, named in 1997.
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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