Joesmithite
Joesmithite is an IMA-recognized mineral species in the silicate class, with the chemical formula Pb²⁺Ca₂(Mg₃Fe³⁺₂)(Si₆Be₂)O₂₂(OH)₂.
It crystallizes in the monoclinic crystal system (space group P2/a). It is a member of the Amphibole structural group.
Key properties: Mohs hardness 5.5; specific gravity 3.83; Pale brown streak; Subadamantine luster; optically biaxial.
IMA symbol Joe, IMA status: approved, named in 1968.
A rare mineral found in a metamorphosed Fe{Mn orebody.
It is found associated with Hematite, magnetite, manganoan aegirine, quartz, barite, calcite.
The name refers to Professor Joseph Victor Smith (1928{), English-American mineralogist and petrologist of the University of Chicago, Chicago, Illinois, USA.
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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