Argyrodite

Type locality material is usually botryoidal with crystallized surfaces are uncommon.

History

Activities related to discovery and approval of the group members

Structural context

Argyrodite
Crystal System orthorhombicCrystal Class orthorhombic pyramidalSpace Group Pna21
a15.099—15.149 (15.124)
b7.458—7.476 (7.467)
c10.568—10.589 (10.5785)
alpha90
beta90
gamma90
volume1190.045—1199.25 (1194.6475)

Based on 2 measurements

Chemical context

Stoichiometric formulas

Argyrodite
mindat.org
  • March 13, 2023Ag8GeS6Up to about 40 mol-% of the sulfur may be replaced by selenium (Wang et al., 1984). Intermediate members of the argyrodite-canfieldite series are common and many specimens of that series prove to be different members of the series than the label suggests.
IMA
  • March 13, 2023Ag8GeS6
mineralogy.rocks
  • Aug. 30, 2022Ag8GeS6

Elements recorded on EPMA

2
Ag
2
Ge
2
S

Physical properties

ColorColor entities, recognized using a custom trained NER model
      Color noteOriginal color note from the source
      Grey, black
      StreakStreak entities, recognized using a custom trained NER model
      • grey-black
      Streak noteOriginal streak note from the source
      Grey-black
      Lustre
      Metallic
      Fracture
      Irregular/Uneven
      Conchoidal
      Transparency
      Opaque
      Tenacity
      brittle
      Hardness
      2.5—3
      Calculated density
      6.32