Strontio-orthojoaquinite

strontio-orthojoaquinite

benitoite

leucosphenite

joaquinite

Images

Formula: NaSr₄Fe³⁺Ti₂Si₈O₂₄(OH)₄
Cyclosilicate (ring silicate), joaquinite group, paramorph of strontiojoaquinite, strontium- and titanium- bearing mineral
Crystal System: Orthorhombic
Specific gravity: 3.62 measured, 3.87 calculated
Hardness: 5½
Colour: Yellow
Environments

Metamorphic environments

Strontio-orthojoaquinite was redefined in 1979, and to date (February 2023) has been reported only at Ōmi, Itoigawa City, Niigata Prefecture, Japan (two locations).

Localities

At the type locality, Ōmi, Itoigawa City, Niigata Prefecture, Japan, strontio-orthojoaquinite occurs in an amphibolite - quartz - albitite dike cutting serpentinite, associated with benitoite and leucosphenite (HOM).

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