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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)4ยท12H2O
- 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
- WebMineral
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- Mindat
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Calcioferrite from Klemms Quarry, Moculta, South Australia, Australia

Calcioferrite from Bruguers, Barcelona Province, Spain

Green nodules to 4mm in chalky white Tinticite.