Database of luminescent minerals 

CLINOHUMITE

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

Family: Silicates

Status: IMA-GP

Crystal system : Monoclinic

Display mineral: NON

Luminescence:

Daylight picture

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

Shortwave (254nm) picture

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

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Phosphorescence (in the common sense of the term) observable with the naked eye:

No data

Activator(s) and spectrum:

Activator(s): Mn²⁺ , 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)

Col. G. Barmarin; Spectre: G. Barmarin

Spectrum Galery:

  
  Go to the galery (3 spectra)

Comments on spectrum and activators:

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 localities for fluorescence (*):

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

(*)The data are not exhaustive and are limited to a few remarkable localities for fluorescence

Bibliographic 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 the Internet:

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

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

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