Butlerite

Compare the anhydrous counterpart: 'Unnamed (Fe Sulphate Hydroxide)'.

History

Activities related to discovery and approval of the group members

Structural context

Butlerite
Crystal System monoclinicCrystal Class prismaticSpace Group P21/m
a6.44—6.527 (6.5033)
b7.31—7.376 (7.3588)
c5.84—5.87 (5.8552)
alpha90
beta108.38—108.59 (108.5112)
gamma90
volume262.104—267.4 (265.7022)

Based on 5 measurements

Chemical context

Stoichiometric formulas

Butlerite
mindat.org
  • March 13, 2023Fe3+(SO4)(OH)·2H2O
IMA
  • March 13, 2023Fe3+(SO4)(OH) · 2H2O
mineralogy.rocks
  • Aug. 30, 2022Fe3+S6+O4(OH)·2H2O

Elements recorded on EPMA

4
Fe
4
H
4
O
4
S
1
Al
1
Si

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • dark orange
  • light yellow-orange
Color noteOriginal color note from the source
Dark orange; light yellow-orange in transmitted light.
StreakStreak entities, recognized using a custom trained NER model
  • pale yellow
Streak noteOriginal streak note from the source
Pale yellow
Lustre
Vitreous
Transparency
Translucent
Hardness
2.5
Calculated density
2.53