Database of luminescent Minerals

CLINOHUMITE

Chemical Formula: (Mg,Fe⁺²)₉(SiO₄)₄(F,OH)₂

Familly: Silicates

Status: IMA-GP

Crystal System: Monoclinic

Mineral for Display: No

Luminescence:

Daylight Picture

CLINOHUMITE, Tajikistan;
Col. G.Barmarin; Photo: G. Barmarin

Short Waves Pictures (254nm)

CLINOHUMITE, Tajikistan; UVSW
Col. G.Barmarin; Photo: G. Barmarin

Phosphorescence (in the common meaning of the term) seen by naked eye:

Main Activator(s) and spectrum:

Most Common Activator: Mn²⁺

Other activators:            Fe³⁺ , TiO₆ , n[TiO₆] cluster ,

Peaks in the spectrum (nm):

TiO_n (Ti⁴⁺ - Si⁴⁺) :  500nm

n[TiO_n] :  550-600nm

Mn²⁺ repl. Mg²⁺ : 630 - 650nm 

Fe³⁺ :  broad band at 745nm

OH (?) : 660nm (peak)

  To the spectrum gallery (1 spectra in the gallery)

Comments on activators and spectra:

Steady state luminescence of clinohumite was connected to Mn²⁺ and possible TiO₆ centers (Gorobets and Rogojine 2001).

Excitation by CW laser with 532 nm revealed two emission bands which may be ascribed to Mn²⁺ and Fe³⁺ (Gaft)

Best Locality for luminescence(*):

• Pamir Mountains, Tadzhikistan;
• Lake Albano (south of Rome), Italy;

(*)Data are not exhaustive and are limited to the most important localities for fluorescence

Bibliographical Reference for luminescence:

• Luminescence Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,
• Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,

Mineralogical Reference on internet:

  http://www.mindat.org/show.php?name=Clinohumite

  http://webmineral.com/data/Clinohumite.shtml

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