Meierite
Meierite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ba₄₄Si₆₆Al₃₀O₁₉₂Cl₂₅(OH)₃₃.
It crystallizes in the cubic crystal system (space group Im3m).
Key properties: Mohs hardness 5.5; specific gravity 3.5; White streak; Vitreous luster.
IMA symbol Mir, IMA status: approved, named in 2014.
Found in a hydrothermal Pb-Zn deposit in lenses of pyroxene-quartz skarn.
It is found associated with Gillespite, pellyite, edingtonite; alters to a mixture of cerchiaraite-(Fe) and hedenbergite.
The mineral was named to honor Walter M. Meier (1926-2009) who among numerous other contributions to zeolite science determined the atomic structure of zeolite ZK-5.
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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