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Mineralpedia Details for Rapidcreekite

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Rapidcreekite

Rapidcreekite

Named after the Rapid Creek type locality in Yukon Territory, Canada. At thetype locality, Rapidcreekite, a secondary mineral, is “formed along joint and bedding-plane surfaces of quartz-rich sideritic iron formation.” According to mindat.org, Rapidcreekite has other localities in Germany, Norway, and Romania.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/rapidcreekite.pdf

Formula
Ca2(SO4)(CO3)·4H2
Crystal System
Orthorhombic 
Crystal Habit
Acicular 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
WebMineral
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Mindat
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Rapidcreekite from Rapid Creek, Yukon Territory, Canada

Rapidcreekite
            from Rapid Creek, Yukon Territory, Canada

White radial crystal sprays to 2.5mm.

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Rapidcreekite from Crosscut Creek, Rapid Creek, Yukon Territory, Canada

Rapidcreekite
            from Crosscut Creek, Rapid Creek, Yukon Territory, Canada
Special Info
Type Locality

Snow white sprays of Rapidcreekite to 2mm. Nice piece, usually hard to find on the market.

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