Cacoxenite

Infobox mineral
name = Cacoxenite
category = Hydrated Phosphate Group mineral
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formula = Fe₂₄³⁺Al [(OH)₁₂|OH₆|(PO₄)₁₇] 17H₂O
molweight = 4,481.51 gm
color = Brownish yellow, Green, Yellow, Golden yellow, Red yellow.
habit = Acicular, Radial, Stellate
system = Monoclinic
twinning =
cleavage =
fracture =
tenacity =
mohs = 3-4
luster = Silky
polish =
refractive =
opticalprop = Anisotrophic
birefringence = 0.060
dispersion =
pleochroism = visible
fluorescence=
absorption =
streak = White
gravity =
density = 2.217 g/cm3
melt =
fusibility =
diagnostic =
solubility =
diaphaneity = semitransparent
other =
references = [ [http://www.webmineral.com/data/Cacoxenite.shtml Cacoxenite Mineral Data ] ] [ [http://www.mindat.org/min-840.html Cacoxenite: Cacoxenite mineral information and data] ]

Cacoxenite (Fe₂₄³⁺Al [(OH)₁₂|OH₆|(PO₄)₁₇] 17H₂O) is a mineral commonly found in in magnetic and limonite iron ores. The name comes from the Greek κăκός for "bad" and ζέυος for "guest" due to the fact that the phosphorous content of Cacoxenite lessens the quality of iron smelted from ore containing it.

References