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Mineral group · Silicate

Axinite

Ca₂(Mn,Fe,Mg)Al₂BSi₄O₁₅(OH)

Wedge-shaped borosilicate series — axinite-(Fe), -(Mg), -(Mn).

Hardness6.5–7
Crystal systemTriclinic
ClassSilicate
←PrevAxeliteNextAxinite-(Fe)→
Axinite specimen

Axinite Locality: Schierke, Wernigerode, Harz Mts, Saxony-Anhalt, Germany Axinite crystals on a specimen from Schierke, a classic german locality. Field of view — Photo: Leon Hupperichs · CC BY-SA 3.0

Axinite

Axinite is a brown to violet-brown, or reddish-brown bladed group of minerals composed of calcium aluminium boro-silicate, (Ca,Fe,Mn)3Al2BO3Si4O12OH. Axinite is pyroelectric and piezoelectric.

Intro adapted from Wikipedia (CC BY-SA).

Axinite is a mineral group, with the chemical formula Ca₂(Mn,Fe,Mg)Al₂BSi₄O₁₅(OH).

It crystallizes in the triclinic crystal system.

Key properties: Mohs hardness 6.5–7; typically brown or purple or blue.

Collections: Collector Favorites, Gemstones.

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