May 28 2014
Carlosruizite was named after Carlos Ruiz F. (1916–), who was the first Director of the Chilean Geological Survey.
Properties of Carlosruizite
The following are the key properties of carlosruizite:
- Cell Data
- Space group: P3c1
- a = 9.5901(8)
- c = 27.56(2)
- Z = 1
- Crystal Data
- Hexagonal
- Point group: 3 2/m
- As thin pseudorhombohedral platy {0001} crystals with hexagonal outline, modified by {1012}, to < 200µm
- X-ray powder pattern: 3.561 (100), 3.058 (39), 2.717 (39), 3.082 (32), 13.75 (30), 7.10 (20), 3.974 (16)
- Chemical Composition
| Elements |
Content 1 |
| I2O5 |
45.6 |
| SeO3 |
19.0 |
| MgO |
9.2 |
| SO3 |
7.9 |
| K2O |
6.7 |
| Na2O |
4.7 |
| CrO3 |
2.5 |
| H2O |
n.d. |
| Total |
95.6 |
- Optical Properties
- Optical class: Uniaxial (-)
- ω = 1.655(3)
- ε = 1.642(1)
- Estimated Properties
| Electron density |
Bulk density (electron density) = 3.12 g/cm3
note: Specific gravity of carlosruizite = 3.36 g/cm3 |
| Photoelectric |
PECarlosruizite = 134.75 barns/electron
U=PECarlosruizite x ρ electron density = 420.07 barns/cm3 |
| Fermion index |
Fermion index = 0.01
Boson index = 0.99 |
Radioactivity
|
Carlosruizite is radioactive (barely detectable)
|
How to Identify Carlosruizite
Carlosruizite can be identified in the field by its pale yellow color. It is sometimes colorless. Its transparent form has {110} good cleavage. This mineral has a vitreous luster with white streak. The fracture on this mineral is brittle.
The density of carlosruizite is 3.42 g/cm3, with a hardness of 2.5 to 3 - between finger nail and calcite.
Global Distribution
Carlosruizite is distributed mainly in Chile from near Zapiga, Tarapaca.
Occurrence of Carlosruizite and Useful Mineral Association
Carlosruizite occurs in a rare constituent of nitrate ores.
It is often associated with minerals such as Iquiqueite, nitratine, halite, darapskite, and residues containing dietzeite, bruggenite, tarapacaite, ulexite, probertite, lopezite, and gypsum after leaching in water.
References