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Silicate

Piemontite-(Sr)

CaSr(Al₂Mn³⁺)[Si₂O₇][SiO₄]O(OH)
Crystal systemMonoclinic
ClassSilicate
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Piemontite-(Sr) specimen

Very nice purple crystal aggregates of the strontium and much rarer analogue of piemontite, strontiopiemontite (=Piemontite-(Sr), from: Gambatesa Mine, Reppia, Genova, Liguria, Italy. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY 4.0

Piemontite-(Sr)

Piemontite-(Sr) is an IMA-recognized mineral species in the silicate class, with the chemical formula CaSr(Al₂Mn³⁺)[Si₂O₇][SiO₄]O(OH).

It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Clinozoisite, Epidote structural group.

IMA symbol Pmt-Sr, IMA status: approved, named in 1989.

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 P minerals or help write this entry.