Picropharmacolite

Usually found as small to microscopic pearly white botryoids with a radiating structure internally, also commonly as silky fibrous aggregates or small acicular crystals.

History

Activities related to discovery and approval of the group members

Structural context

Picropharmacolite
Crystal System triclinicCrystal Class pinacoidalSpace Group P-1
a13.547
b13.5
c6.71
alpha99.85
beta96.41
gamma91.6
volume1200.12

Based on 2 measurements

Chemical context

Stoichiometric formulas

Picropharmacolite
mindat.org
  • March 13, 2023Ca4Mg(AsO4)2(HAsO4)2·11H2O
IMA
  • March 13, 2023Ca4Mg(AsO3OH)2(AsO4)2 · 11H2O
mineralogy.rocks
  • Aug. 30, 2022Ca4Mg(As5+O3OH)2(As5+O4)2·11H2O

Elements recorded on EPMA

2
As
2
Ca
2
H
2
Mg
2
O
1
Al
1
S

Physical properties

ColorColor entities, recognized using a custom trained NER model
    • colorless
    Color noteOriginal color note from the source
    White; colorless in transmitted light.
    StreakStreak entities, recognized using a custom trained NER model
      Streak noteOriginal streak note from the source
      White
      Lustre
      Sub-Vitreous
      Silky
      Pearly
      Fracture
      Fibrous
      Micaceous
      Transparency
      Transparent
      Translucent
      Tenacity
      fragile
      Hardness
      1—2
      Measured density
      2.55—2.64
      Calculated density
      2.58