Guidottiite
Guidottiite is an IMA-recognized mineral species in the silicate class, with the chemical formula Mn₂Fe³⁺(SiFe³⁺)O₅(OH)₄.
It crystallizes in the hexagonal crystal system (space group P6_3). It is a member of the Serpentine, Clay structural group.
Key properties: Mohs hardness 4.25; specific gravity 3.33; Vitreous to silky luster.
IMA symbol Gdt, IMA status: approved, named in 2009.
Found in a pocket in a hydrothermally altered, bedded manganese deposit.
It is found associated with Hematite, chlorite, leucophoenicite, caryopilite, barite, rhodochrosite, shigaite, gageite.
The mineral was named to honor Charles V. Guidotti (1935-2005), University of Maine, USA., for his many contributions to phyllosilicate mineralogy.
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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