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Mineralpedia Details for Calcioferrite

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Calcioferrite

Calcioferrite

Named in reference to the calcium (calci) and iron (Latin: ferrum) in the composition of the mineral. Calcioferrite is a rare mineral that can be found in localities in Germany, the Cape Verde Islands off the West coast of Africa, Australia, and Kazakhstan among only a few others. It occurs in nodules in clay and in phosphatic clay. Associated minerals include montgoneryite, jarosite, cacoxenite, tinticite, apatite, and pyrite.

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

Formula
Ca4MgFe3+4(PO4)6(OH)4ยท12H2
Crystal System
Monoclinic 
Crystal Habit
Foliated, Reniform 
Cleavage
Perfect, Very Good, None 
Luster
Pearly 
Color
greenish yellow, yellow, yellow green, yellowish white 
Streak
yellowish white 
Class
Monoclinic - Sphenoidal 
Fracture
Brittle 
Hardness
2.5 
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Calcioferrite from Klemms Quarry, Moculta, South Australia, Australia

Calcioferrite
            from Klemms Quarry, Moculta, South Australia, Australia Thin, Pale yellow plates to less than 0.5mm in tiny pockets in limonitic matrix.
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Calcioferrite from Bruguers, Barcelona Province, Spain

Calcioferrite
            from Bruguers, Barcelona Province, Spain

Green nodules to 4mm in chalky white Tinticite.

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