Supriya Ghosh (Editor)

Allanpringite

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Category
  
Phosphate mineral

Strunz classification
  
8.DC.50

Crystal system
  
Monoclinic

Formula (repeating unit)
  
Fe3(PO4)2(OH)3·5H2O

Dana classification
  
42.10.02.02

Allanpringite

Crystal class
  
Prismatic (2/m) (same H-M symbol)

Allanpringite is a phosphate mineral named after Australian mineralogist Allan Pring, South Australian Museum. Allanpringite is a Fe3+ analogue Al-phosphate mineral wavellite, but it has a different crystal symmetry – monoclinic instead of orthorhombic in wavellite. It forms needle-like crystals, which are always twinned and form parallel bundles up to about 2 mm long. They are often found in association with other iron phosphates in abandoned iron mines.

References

Allanpringite Wikipedia