Chinchorroite
Chinchorroite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Na₂Mg₅(As₂O₇)₂(AsO₃OH)₂(H₂O)₁₀.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 2.5; specific gravity 2.75; White streak; Vitreous luster; optically biaxial.
IMA symbol Cch, IMA status: approved, named in 2018.
It is found associated with Anhydrite, gypsum, halite, talmessite.
The name refers to the Chinchorro culture of the inhabitants of the coastal region of northern Chile and southern Peru from 9000 to 3500 years BP that includes the area around Torrecillas.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
Browse more C minerals or help write this entry.