May 8 2013
Kamaishilite is a tetragonal colorless mineral containing silicon, oxygen, hydrogen, calcium and aluminium. It was first discovered from Kamaishi mine, Kamaishi, Iwate Prefecture, Honshu, Japan in 1981. It was named for its area of discovery.
Properties of Kamaishilite
The following are the key properties of Kamaishilite:
- Cell Data
- Space Group: Body-centered cell
- a = 8.850
- c = 8.770
- Z = 4
- Crystal Data
- Tetragonal
- Point Group: n.d
- As grains up to about 0.1 mm
- X-ray Powder Pattern: 3.607 (100), 2.799 (85), 2.777 (40), 2.547 (40), 1.557 (35), 2.085 (30).
- Chemical Composition
| Elements |
Content |
| CaO |
37.42 |
| Al2O3 |
34.15 |
| SiO2 |
20.03 |
| H2O+ |
6.1 |
| H2O- |
0.2 |
| FeO |
0.21 |
| MgO |
0.02 |
| Total |
98.13 |
- Optical Properties
- Optical Class: Isotropic, nearly
- n = 1.629
- Estimated Properties
| Electron density |
Bulk density (electron density)=2.83 g/cm3
note: Specific gravity of Kamaishilite =2.83 g/cm3 |
| Photoelectric |
PEKamaishilite = 4.28 barns/electron
U= PEKamaishilite x ρElectron density= 12.10 barns/cm3 |
| Fermion index |
Fermion index = 0.005
Boson index = 0.99 |
| Radioactivity |
Kamaishilite is not radioactive |
How to Identify Kamaishilite
Kamaishilite is a colorless, transparent mineral having white streak and vitreous luster. It can be formed as microscopic crystals. The relative density of kamaishilite is 2.83 g/cm3.
Global Distribution
Kamaishilite is widely distributed in the Kamaishi mine, Iwate Prefecture, Japan.
Occurrence of Kamaishilite and Useful Mineral Association
Kamaishilite occurs in vesuvianite skarn in a marble. It is closely associated with minerals like chalcopyrite, magnetite, calcite, perovskite and vesuvianite.
References