Jun 12 2014
Aerugite was named by Gilbert-Joseph Adam in 1869, from the Greek word aerugo, which means copper rust, in allusion to its appearance.
Properties of Aerugite
The following are the key properties of Aerugite:
- Cell Data
- Space group: R3m (synthetic)
- a = 5.9511(5)
- c = 27.5676(20)
- Z = 1
- Crystal Data
- Hexagonal
- Point group: 3 2/m
- Fine-grained crystalline
- Massive
- As crusts, to 2mm thick
- X-ray powder pattern: 2.060 (vvs), 3.76 (vs), 2.329 (s), 5.05 (s), 2.862 (s), 2.492 (s), 1.485 (s)
- Chemical Composition
| Elements |
Content 1 |
Content 2 |
Content 3 |
Content 4 |
| NiO |
62.07 |
60.9 |
61.3 |
64.81 |
| As2O5 |
36.57 |
36.3 |
37.6 |
35.19 |
| CoO |
0.54 |
1.2 |
0.7 |
- |
| CuO |
0.34 |
0.3 |
0.7 |
- |
| Bi2O3 |
0.24 |
|
- |
| FeO |
- |
1.3 |
0.6 |
- |
| P2O5 |
0.14 |
- |
- |
- |
| Fe2O3 |
trace |
- |
- |
- |
| Total |
99.90 |
[100.0] |
100.9 |
100.00 |
- Optical Properties
- Semi-transparent
- ω = n.d
- ε = n.d
- Estimated Properties
| Electron density |
Bulk density (electron density) = 5.46 g/cm3
note: Specific gravity of Aerugite = 5.76 g/cm3 |
| Photoelectric |
PEAerugite = 37.82 barns/electron
U = PEAerugite x ρ electron density = 206.47 barns/cm3 |
| Fermion index |
Fermion index = 0.0062
Boson index = 0.9937 |
Radioactivity
|
Aerugite is not radioactive
|
How to Identify Aerugite
Aerugite can be identified in the field by its color variations, such as deep blue-green, and green. It is opaque and non-magnetic, and its encrustations form crust-like aggregates on matrix. This mineral has a greenish-white streak.
The density of aerugite is 5.85 to 5.95 g/cm3, with a hardness of 4 – approximate to fluorite.
Global Distribution
Aerugite is distributed in the following places:
- Germany - From Johanngeorgenstadt, Saxony
- England - South Terras mine, St. Stephen-in-Brannel, Cornwall
Occurrence of Aerugite and Useful Mineral Association
Aerugite occurs in a rare secondary mineral in hydrothermal Ni–As–U ore deposits.
It is often associated with minerals such as bismuth, bunsenite, xanthiosite, and xanthiosite.
References