Aug 15 2013
Hoelite is a very rare organic mineral discovered in 1922 at Mt. Pyramide, Spitsbergen, Norway. The mineral was named after Adolf Hoel, geologist, leader of a Norwegian expedition to Spitzbergen.
Properties of Hoelite
The following are the key properties of Hoelite:
- Cell Data
- Space Group: P211a
- a = 15.81
- b = 3.967
- c = 7.876
- f3 = 102.67°
- Z = 2.
- Crystal Data
- Monoclinic, pseudo-orthorhombic
- Point Group: 21m
- As delicate needles, to several mm long
- X-ray Powder Pattern: 3.52 (100), 7.69 (95), 3.36 (80), 6.16 (50), 3.84 (35), 3.14 (14), 3.79 (10).
- Optical Properties
- Optical Class: [Biaxial (+)]
- Orientation: X II elongation
- α = ∼1.75
- β = ∼1.75
- γ = ∼2
- 2V{meas.) = n.d.
- Estimated Properties
| Electron density |
Bulk density (electron density) = 1.48cm3
note: Specific gravity of Hoelite = 1.43 g/cm3 |
| Photoelectric |
PEHoelite = 0.19 barns/electron
U= PEHoelite x ρElectron density = 0.28 barns/cm3 |
| Fermion index |
Fermion index = 0.008
Boson index = 0.991 |
Radioactivity
|
Hoelite is not radioactive
|
How to Identify Hoelite
Hoelite is a yellow or yellow green mineral with light yellow streak and good cleavage. The density of hoelite is 1.42 g/cm3.
Global Distribution
Hoelite is largely distributed in Mt. Pyramide, Spitsbergen, Norway.
Occurrence of Hoelite and Useful Mineral Association
Hoelite occurs in crusts around the surface vents of a burning coal deposit. It is closely associated with sulfur and sal ammoniac.
References