Arcanite

Arcanite-Mascagnite Series. This species was described and named based on artificial material and the type occurrence, which is anthropogenic (pine rail tie in a mine). It has since been identified in nature.
NOTE: Well-crystalline specimens on the market (e.g. those labelled from Poland, or anything that looks better than the photos of natural material at the head of this page) are grown artificially and are not natural minerals. See also spessartine arcanite.

History

Activities related to discovery and approval of the group members

Structural context

Arcanite
Crystal System orthorhombicSpace Group Pnma
a7.456—7.476 (7.466)
b10.071—10.08 (10.0755)
c5.763—5.776 (5.7695)
alpha90
beta90
gamma90
volume433.901—434.104 (434.0025)

Based on 2 measurements

Chemical context

Stoichiometric formulas

Arcanite
mindat.org
  • March 13, 2023K2SO4
IMA
  • March 13, 2023K2(SO4)
mineralogy.rocks
  • Aug. 30, 2022K2S6+O4

Elements recorded on EPMA

2
K
2
O
2
S

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • colourless
      Color noteOriginal color note from the source
      Colourless, white, yellow
      Transparency
      Transparent
      Translucent
      Hardness
      2
      Calculated density
      2.667