Vantasselite

Vantasselite is a rare aluminium phosphate mineral with formula: Al₄(PO₄)₃(OH)₃ •9H₂O. It crystallizes in the orthorhombic system and has a white color, a hardness of 2 to 2.5, a white streak and a pearly luster.^[3]

Vantasselite
Vantasselite, from Bihain, Vielsalm, Luxembourg Province, Belgium
General
Category	Phosphate minerals
Formula	Al4(PO4)3(OH)3 •9H2O
IMA symbol	Vts[1]
Strunz classification	8.DC.37
Crystal system	Orthorhombic Unknown space group
Unit cell	a = 10.52 Å, b = 16.54 Å c = 20.37 Å; Z = 8
Identification
Color	white
Luster	pearly
References	[2]

It occurs in a quartzite quarry north of Bihain, Belgium It was first described in 1987 and named after Belgian mineralogist René Van Tassel.^[2][3]