Attikaite

Note on the type locality: Chukanov et al. (2007) give "Christiana 132" in their original description, but the type locality is in fact only nine metres from the shaft of the Isabelle mine (Branko Rieck, in https://www.mindat.org/mesg-570724.html ). The wrong entry in the publication is probably because of a mis-communication between the finder and the scientists.

History

Activities related to discovery and approval of the group members

Structural context

Attikaite
Crystal System orthorhombicCrystal Class orthorhombic dipyramidalSpace Group Pban
a10.01
b8.199
c22.78
alpha90
beta90
gamma90
volume1870

Based on 1 measurements

Chemical context

Stoichiometric formulas

Attikaite
mindat.org
  • March 13, 2023Ca3Cu2Al2(AsO4)4(OH)4·2H2O
IMA
  • March 13, 2023Ca3Cu2Al2(AsO4)4(OH)4 · 2H2O
mineralogy.rocks
  • Aug. 30, 2022Ca3Cu2+2Al2(As5+O4)4(OH)4·2H2O

Elements recorded on EPMA

1
Al
1
As
1
Ca
1
Cu
1
Fe
1
H
1
Mg
1
O
1
P
1
S

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • light blue
  • greenish blue
Color noteOriginal color note from the source
Light blue, greenish blue
StreakStreak entities, recognized using a custom trained NER model
  • pale blue
Streak noteOriginal streak note from the source
Pale blue
Hardness
2.5—3