allanpringite

{{Infobox mineral | name = Allanpringite | category = Phosphate mineral | boxwidth = | boxbgcolor = | image = Allanpringite-122708.jpg | imagesize = 260px | caption = Picture width 4 mm | formula = Fe3+3(PO4)2(OH)3·5H2O |IMAsymbol=Apg | molweight = 498.07 g/mol | strunz = 8.DC.50 | dana = 42.10.02.02 | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = P21/n | unit cell = a = 9.777, b = 7.358 c = 17.83 [Å]; β = 92.19°; Z = 4 | color = Pale brownish yellow | habit = Acicular | twinning = | cleavage = {hk0} perfect, {010} good | fracture = Irregular/uneven | tenacity = Brittle | mohs = 3 | luster = Vitreous | refractive = nα = 1.662 nβ = 1.675 nγ = 1.747 | opticalprop = Biaxial (+) | birefringence = 0.085 | 2V = 48° (calc.) | pleochroism = | streak = Pale yellowish white | gravity = 2.54 (meas.), 2.583 (calc.) | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Translucent to transparent | other = | references = }} Allanpringite is a phosphate mineral that was named after the Australian mineralogist, Allan Pring of the 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.