Antarcticite

A highly hygroscopic mineral. May dehydrate to mesohydride under certain conditions. A synthetic Sr analogue is known.

History

Activities related to discovery and approval of the group members

Structural context

Antarcticite
Crystal System trigonalCrystal Class trigonal trapezohedralSpace Group P321
a7.8759—7.94 (7.9044)
b7.8758—7.94 (7.9044)
c3.95—4.108 (4.0149)
alpha90
beta90
gamma120
volume212.4—224.3 (217.2738)

Based on 5 measurements

Chemical context

Stoichiometric formulas

Antarcticite
mindat.org
  • March 13, 2023CaCl2·6H2O
IMA
  • March 13, 2023CaCl2 · 6H2O
mineralogy.rocks
  • Aug. 30, 2022CaCl2·6H2O

Elements recorded on EPMA

4
Cl
4
O
3
H
2
Ca
2
Sr

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • colourless
Color noteOriginal color note from the source
Colourless
StreakStreak entities, recognized using a custom trained NER model
    Streak noteOriginal streak note from the source
    White
    Lustre
    Vitreous
    Transparency
    Transparent
    Tenacity
    brittle
    Hardness
    2—3
    Calculated density
    1.7