General Information:
Chemical Formula:
Fe++Al(PO4)(OH)2·(H2O)
Composition:
(Molecular Weight = 229.83 gm)
Aluminum 11.74 % Al
Iron 24.30 % Fe
Phosphorus 13.48 % P
Hydrogen 1.75 % H
Oxygen 48.73 % O
Empirical Formula:
Fe2+Al(PO4)(OH)2·(H2O)
Environment:
Forma a series with eosphorite.
Locality:
Tavistock, Devonshire, England.
Name Origin:
Named for John George Children (1777-1852), English chemist and mineralogist.
Physical Properties:
Cleavage:
[???] Imperfect
Color:
white, yellowish brown, or brownish black.
Density:
3.18 - 3.25, Average = 3.21
Diaphaniety:
Translucent
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Tabular - Form dimensions are thin in one direction., Platy - Sheet forms (e.g. micas).
Hardness:
4.5-5
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Resinous
Streak:
white
More details...