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Formula: (NaCa2)Mg2(V5+O4)3
Anhydrous vanadate,
berzeliite group,
garnet supergroup, forms a series with
berzeliite
Crystal System: Isometric
Specific gravity: 3.40 measured, 3.43 calculated
Hardness: 5
Streak: Yellow
Colour: Orange-red
Luminescence: Not fluorescent under UV
Environments
Volcanic igneous environments
Fumeroles
Localities
At the type locality, the Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany,
schäferite occurs as orange-red, euhedral crystals, up to 0.15 mm across, in
leucite tephrite lava,
associated with magnesioferrite
(Mindat).
Schäferite from the Caspar Quarry -
Image
At the Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic
field, Milkovsky District, Kamchatka Krai, Russia, schäferite occurs in the high-temperature exhalations
of the fumarole associated with anhydrite,
svabite, berzeliite,
diopside, hematite,
powellite, baryte,
fluorapatite,
calciojohillerite,
ludwigite,
magnesioferrite,
anorthite and titanite
(MM 87.5.695–701, AM 107.8.1626–1634, MM 86.1.103–111, MM 85.2.215–223).
Schäferite from the Arsenatnaya Fumarole -
Image
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