Guide of

Luminescent

minerals from Langban, Värmland, Sweden



Gérard BARMARIN

List of luminescent mineral from Langban, Värmland, Sweden found in the database of fluomin.org

 

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There are 35 luminescent minerals found in Langban, Värmland, Sweden, listed in the database.

 

•   BANALSITE BaNa₂Al₄Si₄O₁₆
  
  LW: Yellowish Green
  MW: Yellowish Green
  SW: Bluish White
  Comments:

  Fluorescence Color similar to eucryptite for Wales UK specimens.

  
  
  

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•   BARYLITE BaBe₂Si₂O₇
  
  LW:
  MW:
  SW: Violet Pink
  Comments:
  
  

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•   BARYTE BaSO₄
  
  LW: Yellowish White
  MW: Yellowish White
  SW: Yellowish White
  Comments:

  Mineral barite is one of the first luminescent materials from which the famous Bologna stone was obtained.

  Nevertheless, up today the understanding of natural barite luminescence is very scarce.

  It has been known for a long time that some specimens of barite are fluorescent under UV exposure and emit white, yellow, green or orange light.

  In steady-state luminescence spectra of barite different luminescence bands from the UV to the red part of the spectrum have been detected.

  However, only UO₂²⁺ and Eu²⁺ luminescence centers have been confidently identified (Tarashchan 1978; Gaft et al. 1985).

  Laser-induced time-resolved technique enables to detect Ag⁺, Bi²⁺, Bi³⁺, Eu²⁺, Eu³⁺, Ce³⁺, Nd³⁺, (UO₂)²⁺ and several still not identified emission centers (Gaft et al. 2001, 2008b) 

  
  
  

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•   BARYTOCALCITE BaCa(CO₃)₂
  
  LW:
  MW:
  SW: Tawn
  Comments:

  Difficult to recognize from associated minerals, so fluorescence description is sometime subject to caution. For exemple in Nentsberry Haggs Mine, Alston Moor, Eden, Cumbria, United Kingdom barytocalcite is described as fluorescing Pink SW, associated with Witherite fluorescing White SW+LW and Phosphorescent by some authors and fluo White SW associated with calcite fluorescing red by others...;

  
  
  

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•   BENSTONITE (Ba,Sr)₆ (Ca,Mn)₆ Mg (CO₃ )₁₃
  
  LW: Orange
  MW:
  SW: Red
  Comments:
  
  

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•   BERGSLAGITE CaBe(AsO₄)(OH)
  
  LW:
  MW:
  SW: Bluish
  Comments:

  Associated with orange red fluo calcite or red fluo Tilasite (Langban);

  
  
  

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•   BERZELIITE NaCa₂(Mg,Mn⁺²)₂(AsO₄)₃
  
  LW: Not fluorescent
  MW:
  SW: Bluish White
  Comments:

  Grains of pure yellow Berzeliite show a red fluorescence under shortwave and no longwave fluorescence. So it is not the fluorescence of calcite through the berzeliite which is seen on shortwave. (?)

  It seems that the Berzellite which gives a response under SW is Zn-bearing. The fluorescence color is green  under SW. (info: S. Stolze)

   

  
  
  

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•   BRUCITE Mg(OH)₂
  
  LW: Bluish White
  MW: Bluish White
  SW: Bluish White
  Comments:
  
  

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•   BUSTAMITE (Mn⁺²,Ca)₃Si₃O₉
  
  LW: Red
  MW:
  SW: Violet red
  Comments:

  Bustamite from Sterling Hill is not fluorescent. Bustamite from Franklin is mostly not fluorescent but sometimes.

  
  
  

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•   CALCITE CaCO₃
  
  LW: Pink
  MW: Red
  SW: Blue
  Comments:

  manganocalcite OC rose, rouge; OL : orange, rose, rouge, rouge orangé;
  plumbocalcite : OC et OL: rouge sombre ;
  strontiocalcite OL et OC: crème, blanc-jaunâtre, rose;
  thinolite ( = pseudomorphose après gaylussite): OL et OC: orange, blanc bleuté;

  
  
  

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•   CARYINITE (Ca,Na)(Ca,Mn⁺²)₂(AsO₄)₃
  
  LW: Red
  MW:
  SW: Red
  Comments:
  
  

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•   CELSIAN BaAl₂Si₂O₈
  
  LW: Blue
  MW: Blue
  SW: Blue
  Comments:
  
  

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•   CHONDRODITE (Mg,Fe⁺²)₅(SiO₄)₂(F,OH)₂
  
  LW: Yellowish
  MW:
  SW: Yellow
  Comments:

  Easily confused with NORBERGITE which is visually very similar to it.

  
  
  

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•   CYMRITE BaAl₂Si₂(O,OH)₈ H₂O
  
  LW:
  MW:
  SW: Green
  Comments:
  
  

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•   DOLOMITE CaMg(CO₃)₂
  
  LW: Yellowish White
  MW: Yellowish White
  SW: Yellowish White
  Comments:

  The Crazy Calcite fluo red SW from Franklin, USA is sometime composed by dark red SW fluorescing Dolomite mixed with bright red SW fluorescing Calcite, with black Franklinite  and tiny yellow Diopside crystals. The LW response is in shades of red-pink. It is however possible that the fluorescence of dolomite is due to the observation of the phenomenal fluorescence of calcite by transparency. 

  
  
  

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•   HARSTIGITE Ca₆(Mn⁺²,Mg)Be₄(SiO₄)₂(Si₂O₇)₂(OH)₂
  
  LW: Red
  MW:
  SW: Red
  Comments:
  
  

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•   HEDYPHANE Pb₃Ca₂(AsO₄)₃Cl
  
  LW: Orange
  MW: Red
  SW: Orange
  Comments:

  Samples from Langban are sometimes considered as mislabeled and could be mimetite.

  
  
  

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•   HYALOPHANE (K,Ba)Al(Si,Al)₃O₈
  
  LW:
  MW:
  SW: Violet red
  Comments:

  Sometime intimately associated with margarosanite in Franklin; the margarosanite could therefore be responsible for the blue luminescence.
  Other locality: Andover

  
  
  

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•   JOHNBAUMITE Ca₅(AsO₄)₃(OH,F)
  
  LW:
  MW:
  SW: Dark Orange /Tawn
  Comments:

  The arsenate analogue of Hydroxylapatite. The OH analogue of Turneaurite.

  
  
  

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•   LANARKITE Pb₂O(SO₄)
  
  LW: Yellow
  MW:
  SW: Yellow
  Comments:
  
  

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•   manganocalcite
  
  LW: Pink
  MW: Red
  SW: Red
  Comments:
  
  

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•   MARGAROSANITE Pb(Ca,Mn⁺²)₂Si₃O₉
  
  LW: Violet red
  MW: Red
  SW: Bluish White
  Comments:

  In Jakobsberg, Sweden, wolastonite and margarosanite replace barysilite (see picture by Kjell Gatedal in bibliography)

  
  
  

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•   MIMETITE Pb₅(AsO₄)₃Cl
  
  LW: Yellowish White
  MW:
  SW: Orange
  Comments:

  Sometimes Langban samples are confused with hedyphane

  
  
  

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•   PECTOLITE NaCa₂Si₃O₈(OH)
  
  LW: Yellowish White
  MW: Pink
  SW: Orange
  Comments:

  Luminescence of pectolite was noted in 1903 by Kunz and Baskerville.

  In Mt-St-Hilaire, Pectolite could be confused with Makatite. The major distinguishing feature is the fluorescence. While not all makatite fluoresces, when it does it is moderate to strong blueish white or very pale greenish SW (and sometimes LW as well) and pectolite is fluorescing in pink or orange.

  
  
  

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•   PERICLASE MgO
  
  LW:
  MW:
  SW: Pale Yellow
  Comments:
  
  

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•   POWELLITE CaMoO₄
  
  LW: Yellowish White
  MW:
  SW: Yellowish White
  Comments:

  The tungstates of calcium, strontium, magnesium and zinc, and the molybdates of calcium are known to show luminescence upon excitation by cathode rays or short-wave ultra-violet radiation. It is commonly assumed that this luminescence is characteristic of the tungstate and molybdate groups. The reason why other tungstates and molybdates are found to be non-luminescent is probably the temperature-quenching (see Nature article by F.  A. Kröger in 1947 in the bibliography).

  
  
  

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•   PREHNITE Ca₂Al₂Si₃O₁₀(OH)₂
  
  LW: Yellowish White
  MW: Pale Yellow
  SW: Bluish White
  Comments:
  
  

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•   RHODONITE (Mn⁺²,Fe⁺²,Mg,Ca)SiO₃
  
  LW: Red
  MW:
  SW:
  Comments:
  
  

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•   ROEBLINGITE Pb₂Ca₆Mn⁺²(Si₆O₁₈)(SO₄)₂(OH)₂ 4H₂O
  
  LW: Red
  MW:
  SW: Red
  Comments:
  
  

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•   scapolite / (Group: MEIONITE, MARIALITE )
  
  LW: Violet red
  MW: Orange Red
  SW: Red
  Comments:
  
  

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•   SVABITE Ca₅(AsO₄)₃(F,OH)
  
  LW:
  MW:
  SW: Orange
  Comments:

  Associated with dull red fluorescing tilasite in Langban.

  
  
  

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•   SWEDENBORGITE NaBe₄SbO₇
  
  LW: Red
  MW:
  SW: Blue
  Comments:
  
  

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•   TILASITE CaMg(AsO₄)F
  
  LW:
  MW:
  SW: Red
  Comments:

  Associated with orange fluorescing svabite in Langban;

  
  
  

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•   TRIMERITE CaMn₂⁺²Be₃(SiO₄)₃
  
  LW: Yellow
  MW:
  SW: Yellow
  Comments:
  
  

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•   TURNEAUREITE Ca₅(AsO₄,PO₄)₃ Cl
  
  LW:
  MW:
  SW: Orangy yellow
  Comments:

  The arsenate analogue of Chlorapatite.

  The Ca analogue of Hedyphane.

  
  
  

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