Anorthominasragrite
Anorthominasragrite is an IMA-recognized mineral species in the vanadate class, with the chemical formula V⁴⁺O(SO₄)·5H₂O.
It crystallizes in the triclinic crystal system (space group P1). It is a member of the Minasragrite structural group.
Key properties: Mohs hardness 1; specific gravity 2.12; White streak; Vitreous luster; optically biaxial.
IMA symbol Amrg, IMA status: approved, named in 2001.
Found in sandstone in a silicified fossil tree with a rim of coal around the tree.
It is found associated with Orthominasragrite, bobjonesite.
Prefix, anortho, denotes its relation to minasragrite, as a triclinic polymorph.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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