Jun 3 2014
Calciocopiapite is a member of the Copiapite group of minerals. It is so called because it is a calcium member of the copiapite group.
Properties of Calciocopiapite
The following are the key properties of Calciocopiapite:
- Cell Data
Space Group: [P1] (by analogy to copiapite; ICDD 27-77)
- a = 7.35
- b = 18.21
- c = 7.01
- α = 85.52°
- β = 103.55°
- γ = 100.62°
- Crystal Data
- Triclinic
- Point Group: 1
- As powdery crusts
- X-ray powder pattern: 3.108 (10), 3.027 (10), 2.809 (10), 1.860 (10), 3.458 (9), 1.267 (9), 1.244 (9)
- Chemical Composition
| Elements |
Content 1 |
Content 2 |
| SO3 |
39.00 |
38.92 |
| H2O |
29.30 |
30.66 |
| Fe2O3 |
26.25 |
25.88 |
| CaO |
4.85 |
4.54 |
| MgO |
0.32 |
|
| insol. |
0.40 |
|
| Total |
100.12 |
100.00 |
- Optical Properties
- Optical Class: Biaxial
- α = n.d
- β = n.d
- γ = n.d
- 2V(meas.) = n.d
- Estimated Properties
| Electron density |
Bulk density (electron density) = 2.26 g/cm3
note: Specific gravity of Calciocopiapite = 2.22 g/cm3 |
| Photoelectric |
PECalciocopiapite = 6.69 barns/electron
U = PECalciocopiapite x ρelectron density = 15.14 barns/cm3 |
| Fermion index |
Fermion index = 0.0054
Boson index = 0.994 |
Radioactivity
|
Calciocopiapite is not radioactive
|
How to Identify Calciocopiapite
Calciocopiapite is available in grayish-yellow or brownish-yellow forms. It has a transparent to translucent appearance, pearly lustre, and a yellow-white streak.
The density of calciocopiapite is 2.22 g/cm3, and its relative hardness ranges from 2.5 to 3.
Global Distribution
Calciocopiapite is widely distributed in the Dashkesan deposit, Middle Caucasus Mountains, Azerbaijan.
Occurrence of Calciocopiapite and Useful Mineral Association
Calciocopiapite occurs in an oxidized zone of a pyrite-magnetite deposit in the Dashkesan (Dashkezan) Co-Fe deposit, Dashkesan District, Azerbaijan.
It is associated with hydrous iron oxides, malachite, and chalcanthite.
References