piemontite


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piemontite

[′pē‚män‚tīt]
(mineralogy)
Ca2(Al,Mn3-,Fe)3Si3O12(OH) Reddish-brown epidote mineral that contains manganese. Also known as manganese epidote; piedmontite.
References in periodicals archive ?
The better specimens are undoubtedly those from the Cassagna mine, with pale green prismatic crystals up to 2 mm, sometimes associated with braunite, calcite, piemontite and barite crystals.
Piemontite takes its name after the Italian region of Piedmont.
Notable quartz specimens from the Gambatesa and Molinello mines show inclusions of sursassite, copper and piemontite (Antofilli et al.
Occurrence: In manganese ore consisting of braunite, rhodonite, spessartine, tinzenite, parsettensite, sursassite and strontian piemontite in radiolarites.