Mineralogy Database

Thomsenolite Mineral Data

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General Thomsenolite Information

Help on Chemical  Formula: Chemical Formula: NaCaAlF6•(H2O)
Help on Composition: Composition: Molecular Weight = 222.06 gm
   Sodium    10.35 %  Na   13.96 % Na2O
   Calcium   18.05 %  Ca   25.25 % CaO
   Aluminum  12.15 %  Al   22.96 % Al2O3
   Hydrogen   0.91 %  H     8.11 % H2O
   Oxygen     7.21 %  O
   Fluorine  51.33 %  F    51.33 % F
               -   %   F   -21.62 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCaAlF6•(H2O)
Help on Environment: Environment: Alteration product of cryolite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1868
Help on Locality: Locality: Ivigtut, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Hans Peter Jorgen Julius Thomsen (1826-1909), Daniosh physical chemist and founder of the Greenland cryolite industry.
Help on Name Pronunciation: Name Pronunciation: Thomsenolite + Pronunciation Say THOMSENOLITE
Help on Synonym: Synonym: ICSD 60801
  PDF 22-1360

Thomsenolite Image

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  Thomsenolite   Cryolite

Comments: Massive, white cryolite with solution cavities lined with prismatic Thomsenolite crystals.
Location: Ivigtut, Greenland. Scale: .
© John Veevaert

Thomsenolite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0127:1:2.9272
Help on Cell Dimensions: Cell Dimensions: a = 5.57, b = 5.5, c = 16.1, Z = 4; beta = 96.383° V = 490.17 Den(Calc)= 3.01
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.02(1), 1.963(0.9), 1.996(0.8),

Physical Properties of Thomsenolite

Help on Cleavage: Cleavage: {001} Perfect, {110} Imperfect
Help on Color: Color: Colorless, White, Reddish, Brownish.
Help on Density: Density: 2.98
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Pseudo Cubic - Crystals show a cubic outline.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Greasy
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white

Optical Properties of Thomsenolite

Help on Optical Data: Optical Data: Biaxial (-), a=1.4072, b=1.4136, g=1.415, bire=0.0078

Calculated Properties of Thomsenolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Thomsenolite =3.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002796037
Boson Index = 0.9997203963
Help on Photoelectric: Photoelectric: PEThomsenolite = 3.06 barns/electron
U=PEThomsenolite x rElectron Density= 8.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thomsenolite is Not Radioactive

Thomsenolite Classification

Help on  Dana Class: Dana Class: (11)Halide Complexes; Alumino-fluorides
  (11.06)with miscellaneous formulae
  (11.06.06)Dana Group Thomsenolite NaCaAlF6•(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 03.CB.40 03 - HALIDES
  03.C - Complex Halides
  03.CB -Neso-aluminofluorides
03.CB.40 Pachnolite NaCaAlF6•(H2O) F2/d 2/m
03.CB.40 Thomsenolite NaCaAlF6•(H2O) P 21/c 2/m

Other Thomsenolite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Thomsenolite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 03.CB.40





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