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Silicate

Maricopaite

Ca₂Pb₇(Si₃₆Al₁₂)O₉₉·n(H₂O,OH)
Crystal systemOrthorhombic
ClassSilicate
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Maricopaite specimen

Maricopaite Locality: Moon Anchor Mine (Aggravation Mine; East Vulture Mining Co. Mine), Hummingbird Spring, Osborn District, Big Horn Mts, Maricopa Co., Arizona, USA Field of view 4 mm. Specimen and photo Leon Hupperichs. — Photo: Leon Hupperichs · CC BY-SA 3.0

Maricopaite

Maricopaite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₂Pb₇(Si₃₆Al₁₂)O₉₉·n(H₂O,OH).

It crystallizes in the orthorhombic crystal system (space group Cm2m). It is a member of the Mordenite structural group.

Key properties: specific gravity 2.94; Silky to vitreous luster; optically biaxial.

IMA symbol Mrp, IMA status: approved, named in 1985.

Found in a hydrothermal Pb-Cu ore vein, coating and filling fractures in quartz.

It is found associated with Cerussite, mimetite, fornacite, phoenicochroite, duftite, chrysocolla, wickenburgite, calcite, fluorite, quartz.

The name refers to Maricopa Co., Arizona, USA, where it was discovered.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more M minerals or help write this entry.