Editorial Feature

Hoelite - Occurrence, Properties, and Distribution

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
    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.


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