cacoxenite
Sign in to saveCacoxenite is an iron aluminium phosphate mineral with formula: Fe3+24Al(PO4)17O6(OH)12·17(H2O). Cacoxenite is associated with iron ores. The name comes from the Greek κăκός for "bad" or "evil" and ξένος for "guest" because the phosphorus content of cacoxenite lessens the quality of iron smelted from ore containing it.
Key facts
- Mineral.gravity
- 2.2–2.6
- Mineral.name
- Cacoxenite
- Mineral.category
- Phosphate minerals
- Mineral.boxbgcolor
- deae2a
- Mineral.image
- Cacoxenite-94189.jpg
- Mineral.imagesize
- 280px
- Mineral.caption
- Cacoxenite, Minas de Horcajo, Castile-La Mancha, Spain
- Mineral.formula
- Fe3+24Al(PO4)17O6(OH)12·17(H2O)
- Mineral.IMAsymbol
- Cac
- Mineral.strunz
- 8.DC.40
- Mineral.system
- Hexagonal
- Mineral.class
- Dipyramidal (6/m) (same H-M symbol)
- Mineral.symmetry
- P63/m
- Mineral.unit cell
- a = 27.559(1) Å, c = 10.55 Å; Z = 2
- Mineral.color
- Yellow to brownish yellow, reddish orange, golden yellow, deep orange, green; yellow in transmitted light
- Mineral.habit
- Acicular, radial, stellate
- Mineral.cleavage
- None
- Mineral.fracture
- Uneven
via Wikipedia infobox
Wikidata facts
- Image
- Cacoxenite-94189.jpg
Show 6 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 8.DC.40
- Commons category
- Cacoxenite
- Nickel-Strunz 9th edition (updated 2009)
- 8.DC.40
- IMA Mineral Symbol
- Cac
- chemical formula
- Fe³⁺₂₄AlO₆(PO₄)₁₇(OH)₁₂·75H₂O
- Strunz 8th edition (series ID, updated)
- VII/D.05
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- References
Cacoxenite is an iron aluminium phosphate mineral with formula: Fe3+24Al(PO4)17O6(OH)12·17(H2O). Cacoxenite is associated with iron ores. The name comes from the Greek κăκός for "bad" or "evil" and ξένος for "guest" because the phosphorus content of cacoxenite lessens the quality of iron smelted from ore containing it.
It was first described in 1825 for an occurrence in the Hrbek Mine, Bohemia, Czech Republic. It occurs as a secondary phase in oxidized magnetite and limonite deposits. It also occurs in novaculites and in iron and phosphorus rich sediments.