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Formula: Ca(V5+O3)2.4H2O
Vanadate, paramorph of
rossite
Crystal System: Monoclinic
Specific gravity: 2.451 calculated
Hardness: 2½
Streak: White
Colour: Colourless, tan to brown, nearly black
Solubility: Soluble in water
Environments
Sedimentary environments
Hydrothermal environments
Calciodelrioite is a secondary mineral that occurs as
crystalline crusts on fracture surfaces in the oxidised portions of corvusite-
and montroseite- impregnated
sandstone
(HOM).
Localities
At the Blue Streak mine, Bull Canyon Mining District, Montrose County, Colorado, USA, calciodelrioite is
associated with
delrioite, huemulite,
hummerite,
magnesiopascoite,
powellite and potassium- and magnesium- bearing
decavanadate (salt of the decavanadate anion [V10O28]6-)
(HOM).
At the Saint Jude mine, Slick Rock Mining District, San Miguel County, Colorado, USA, calciodelrioite is
associated with delrioite,
hendersonite, pascoite,
powellite and schindlerite
(HOM). Kokinosite is also found in the same area of the mine
CM 52.1.15-25).
At the type locality, the West Sunday mine, Slick Rock Mining District, San Miguel County, Colorado, USA,
calciodelrioite occurs in the uranium-vanadium
sandstone deposit on fracture surfaces in
corvusite- and montroseite-
impregnated sandstone and forms as a result of the oxidative alteration
of these phases. Associated minerals include celestine,
gypsum, huemulite,
metarossite, pascoite and
rossite. The calciodelrioite occurs as transparent colourless needles,
bundles of tan to brown needles and star bursts of nearly black broad blades composed of tightly intergrown needles
(MM 76.2803-2817.
At the Little Eva mine, Yellow Cat Mesa, Thompsons Mining District, Grand County, Utah, USA, calciodelrioite is
associated with huemulite
(HOM).
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