D'ansite
D'ansite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Na₂₁Mg(SO₄)₁₀Cl₃.
It crystallizes in the cubic crystal system (space group I-43d). It is a member of the Dansite structural group.
Key properties: Mohs hardness 2.5–3; specific gravity 2.63–2.65.
IMA symbol D'an, IMA status: approved, named in 1958.
A component of marine evaporite deposits.
It is found associated with Vanthoffite, thénardite, blödite.
The mineral was named to honor Professor Jean D’Ans (1881–1969), German mineralogist, student of salt deposit chemistry, Technical University, Berlin, Germany.
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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