| |
 |
Thomsenolite Mineral Data
|
|
|
General Thomsenolite Information
|
 Chemical Formula: |
NaCaAlF6•(H2O) |
| 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 |
| Empirical Formula: |
NaCaAlF6•(H2O) |
| Environment: |
Alteration product of cryolite. |
| IMA Status: |
Valid Species (Pre-IMA) 1868 |
| Locality: |
Ivigtut, Greenland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Hans Peter Jorgen Julius Thomsen (1826-1909), Daniosh physical chemist and founder of the Greenland cryolite industry. |
| Name Pronunciation: |
Thomsenolite + Pronunciation  |
| Synonym: |
ICSD 60801 |
| |
PDF 22-1360 |
| |
Thomsenolite Image |
|
Images:
|
|
Thomsenolite Cryolite
Comments: Massive, white cryolite with solution cavities lined with prismatic Thomsenolite crystals.
Location: Ivigtut, Greenland.
Scale: .
© John Veevaert |
|
Thomsenolite Crystallography
|
| Axial Ratios: |
a:b:c =1.0127:1:2.9272 |
| Cell Dimensions: |
a = 5.57, b = 5.5, c = 16.1, Z = 4; beta = 96.383° V = 490.17 Den(Calc)= 3.01 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c |
| X Ray Diffraction: |
By Intensity(I/Io): 4.02(1), 1.963(0.9), 1.996(0.8), |
| |
Physical Properties of Thomsenolite
|
| Cleavage: |
{001} Perfect, {110} Imperfect |
| Color: |
Colorless, White, Reddish, Brownish. |
| Density: |
2.98 |
| Diaphaneity: |
Transparent |
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Habit: |
Pseudo Cubic - Crystals show a cubic outline. |
| Hardness: |
2 - Gypsum |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Vitreous - Greasy |
| Magnetism: |
Nonmagnetic |
| Streak: |
white |
| |
Optical Properties of Thomsenolite
|
| Optical Data: |
Biaxial (-), a=1.4072, b=1.4136, g=1.415, bire=0.0078 |
| |
Calculated Properties of Thomsenolite
|
| Electron Density: |
Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Thomsenolite =3.01 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.0002796037
Boson Index = 0.9997203963 |
| Photoelectric: |
PEThomsenolite = 3.06 barns/electron
U=PEThomsenolite x rElectron Density= 8.96 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thomsenolite is Not Radioactive |
| |
Thomsenolite Classification
|
| Dana Class: |
11.06.06.01 (11)Halide Complexes; Alumino-fluorides |
| |
(11.06)with miscellaneous formulae |
| |
(11.06.06)Dana Group |
| |
11.06.06.01 Thomsenolite NaCaAlF6•(H2O) P 21/c 2/m |
| 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
|
| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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
14 - WWW-MINCRYST
Search for Thomsenolite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Thomsenolite :
Ask about Thomsenolite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espaņol
Print or Cut-and-Paste your Thomsenolite Specimen Label here :
|
Thomsenolite
NaCaAlF6•(H2O)
Dana No: 11.06.06.01 Strunz No: 03.CB.40
Locality:
Notes:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.