Brugnatellite
Brugnatellite is an IMA-recognized mineral species in the carbonate class, with the chemical formula Mg₆Fe³⁺(CO₃)(OH)₁₃·4H₂O.
It crystallizes in the hexagonal crystal system. It is a member of the Hydrotalcite structural group.
Key properties: Mohs hardness 2; specific gravity 2.14; White streak; Pearly luster; optically uniaxial.
IMA symbol Bug, IMA status: questionable, named in 1909.
A hydrothermal alteration product in serpentinite, lining cracks with other magnesium-rich species.
It is found associated with Chrysotile, artinite, hydromagnesite, pyroaurite, magnesite, brucite, aragonite.
The name refers to Luigi Vincenzo Brugnatelli (1859–1928), Professor of Mineralogy, University of Pavia, Pavia, Italy.
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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