Diaspore
Beware! Certain dealers (especially on eBay) have been offering samples of a whitish-metallic feathery material as "diaspore". It appears to be metallic aluminium plumes formed from metal dripping from smelters, and is neither diaspore nor a mineral.
History
Activities related to discovery and approval of the group members
Structural context
Diaspore
Crystal System orthorhombicSpace Group Pnma
a4.315—4.43 (4.3896)
b9.32—9.44 (9.4023)
c2.8—2.84753 (2.8371)
alpha90
beta90
gamma90
volume113.087—118.498 (117.0998)
Based on 21 measurements
Chemical context
Stoichiometric formulas
Diaspore
mindat.org
- March 13, 2023AlO(OH)
IMA
- March 13, 2023AlO(OH)
mineralogy.rocks
- Aug. 30, 2022AlO(OH)
Elements recorded on EPMA
21
Al
21
O
18
H
2
Fe
Physical properties
ColorColor entities, recognized using a custom trained NER model
- colourless
- lilac
- pale yellow
- greyish
- greenish grey
- pinkish
Color noteOriginal color note from the source
White, brown, colourless, pale yellow, greyish, greenish grey, lilac, pinkish
StreakStreak entities, recognized using a custom trained NER model
Streak noteOriginal streak note from the source
White
Lustre
Vitreous
Pearly
Fracture
Conchoidal
Transparency
Transparent
Translucent
Tenacity
very brittle
Hardness
6.5—7
Measured density
3.2—3.5
Calculated density
3.38