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Thomsenolite

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Hans Peter Jørgen Julius Thomsen
Formula:
NaCaAlF6 · H2O
System:
Monoclinic
Colour:
Colourless, white, pale ...
Lustre:
Vitreous, Pearly
Hardness:
2
Name:
Named after Hans Peter Jorgen Julius Thomsen (1826-1909), Professor of Chemistry, University of Copenhagen (Denmark), and founder of the Greenland cryolite industry.
Dimorph of:
This page provides mineralogical data about Thomsenolite.


Classification of Thomsenolite

Approved, 'Grandfathered' (first described prior to 1959)
3.CB.40

3 : HALIDES
C : Complex halides
B : Neso-aluminofluorides
11.6.6.1

11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
8.6.17

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
6 : Halides of Al

Physical Properties of Thomsenolite

Vitreous, Pearly
Diaphaneity (Transparency):
Transparent, Translucent
Comment:
Pearly on cleavages
Colour:
Colourless, white, pale lilac; brownish or reddish tinted due to staining; colourless in transmitted light.
Streak:
White
Hardness (Mohs):
2
Tenacity:
Brittle
Cleavage:
Perfect
On {001}; {110} distinct.
Fracture:
Irregular/Uneven
Density:
2.981 g/cm3 (Measured)    2.986(3) g/cm3 (Calculated)

Optical Data of Thomsenolite

Type:
Biaxial (-)
RI values:
nα = 1.407 nβ = 1.414 nγ = 1.415
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v

Chemical Properties of Thomsenolite

IMA Formula:
NaCaAlF6 · H2O
Elements listed in formula:

Crystallography of Thomsenolite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 5.563(2) Å, b = 5.541(2) Å, c = 16.115(1) Å
β = 96.35(3)°
Ratio:
a:b:c = 1.004 : 1 : 2.908
Unit Cell Volume:
V 493.69 ų (Calculated from Unit Cell)
Morphology:
Crystals commonly prismatic [001]; cubic in aspect with equal development of {001} and {110}. Grouped in parallel aggregates. Also tabular {001}. {110} and terminal prisms strongly striated parallel to the intersection with {001}. {h0l} often curved. Opaline or chalcedony-like crusts and stalactitic masses.
Twinning:
None observed.

Crystallographic forms of Thomsenolite

Crystal Atlas:
Image Loading
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Thomsenolite no.1 - Goldschmidt (1913-1926)
Thomsenolite no.7 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

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Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation

Epitaxial Relationships of Thomsenolite

Epitaxial Minerals:
PachnoliteNaCa[AlF6] · H2O
Epitaxy Comments:
Oriented growths of thomsenolite on pachnolite, with thomsenolite (001) and (110) quasi-parallel to pachnolite (110) and (001). Also with thomsenolite (110) and (110) quasi-parallel to pachnolite (110) and (001).
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Occurrences of Thomsenolite

Type Occurrence of Thomsenolite

Place of Conservation of Type Material:
University of Copenhagen
Associated Minerals at Type Locality:

Relationship of Thomsenolite to other Species

3.CB.05CryolithioniteNa3Al2(LiF4)3
3.CB.15CryoliteNa3AlF6
3.CB.15ElpasoliteK2NaAlF6
3.CB.15SimmonsiteNa2LiAlF6
3.CB.20ColquiriiteCaLiAlF6
3.CB.25WeberiteNa2MgAlF7
3.CB.30KarasugiteSrCaAlF7
3.CB.35UsoviteBa2CaMgAl2F14
3.CB.40PachnoliteNaCaAlF6 · H2O
3.CB.45CarlhintzeiteCa2AlF7 · H2O
3.CB.50YaroslaviteCa3Al2F10(OH)2 · H2O
8.6.1ZharchikhiteAl(OH)2F
8.6.2ChloraluminiteAlCl3 · 6H2O
8.6.3CadwaladeriteAlCl(OH)2 · 4H2O
8.6.4CryolithioniteNa3Al2(LiF4)3
8.6.5CryoliteNa3AlF6
8.6.6ChioliteNa5Al3F14
8.6.7ElpasoliteK2NaAlF6
8.6.8WeberiteNa2MgAlF7
8.6.9Hydrokenoralstonite2Al2F6(H2O)
8.6.10KoeneniteNa4Mg9Al4Cl12(OH)22
8.6.11 Chlor-manasseiteMgxAl(OH)2x+2Cl · (x-0.8)H2O x about 1.75
8.6.12GearksutiteCaAlF4(OH) · H2O
8.6.13ProsopiteCaAl2(F,OH)8
8.6.14YaroslaviteCa3Al2F10(OH)2 · H2O
8.6.15CarlhintzeiteCa2AlF7 · H2O
8.6.16ColquiriiteCaLiAlF6
8.6.18PachnoliteNaCaAlF6 · H2O
8.6.19Zirklerite(Fe,Mg)9Al4Cl18(OH)12 · 14H2O

Other Names for Thomsenolite

Name in Other Languages:

Other Information

Other Information:
Readily soluble in H2SO4.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Thomsenolite

Reference List:
Hagemann, G. (1866), American Journal of Science: 42: 93 (as Dimetric Pachnolite).

Shepard (1866) American Journal of Science: 42: 246 (as Hagemannite).

Dana, J.D. (1868) System of Mineralogy, 5th. Edition, New York: 129.

Nordensiöld (1874) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 2: 81.

Koenig (1876) Proceedings of the Academy of Science of Philadelphia: 42.

Des Cloizeaux (1882) Bulletin de la Société française de Minéralogie: 5: 316.

Brandl in: Groth (1882) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 7: 470.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 180.

Groth (1906) Chem. Kryst.: 1: 461.

Bøggild (1913) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 51: 601.

Goldschmidt, V. (1922) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 8: 130.

Ferguson (1946) Transactions of the Royal Society of Canada, section 4: 40: 11.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 116-118.

Adhikesavalu, D., Cameron, T. S., Knop, O. (1985): Thomsenolite, NaCaAlF6·H2O: hydrogen bonding and comparison with pachnolite, Canadian Journal of Chemistry, 63, 3322-3327.

Mineralogical Record (1993): 24: 34.

Internet Links for Thomsenolite

mindat.org URL:
http://www.mindat.org/min-3940.html
Please feel free to link to this page.
Specimens:
The following Thomsenolite specimens are currently listed for sale on minfind.com.

Localities for Thomsenolite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada
 
  • Québec
    • Montérégie
      • Lajemmerais RCM
        • Varennes & St-Amable
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.
Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118.
Finland
 
  • Southwestern Finland Region
    • Harjavalta
Marttila, E 1969. Satakunnan hiekkakiven sedimentaatio-olosuhteista. Lisensiaattitutkimus, Turun Yliopisto, Geologian laitos, 157 s.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Schnorrer-Köhler, G., Rewitzer, C., Standfuss, L. & Standfuss, K. (1988): Weitere Neufunde aus Lavrions antiken Schlacken. Lapis 13 (2), 11-14.
        • Thorikos area
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
Greenland (TL)
 
  • Sermersooq
    • Arsuk Fjord
      • Ivittuut (Ivigtut)
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 112, 117; Acta Cryst. 23 (1967).; Petersen, O.V. and Secher, K. (1993): The minerals of Greenland. Mineralogical Record 24 (2): 1-65 (p.36)
Iceland
 
  • Southern Region
    • Vestmannaeyjar archipelago (Westman islands)
      • Heimaey island
        • Heimaey
Mitolo, D., Garavelli, A., Pedersen, L., Balić-Žunić, T., Jakobsson, S.P., Vurro, F. (2008): Mineralogy of actually forming sublimates at Eldfell Volcano, Heimaey (Vestmannaeyjar archipelago), Iceland. Plinius, 34, 322.
Japan
 
  • Honshu Island
    • Kinki Region
      • Shiga Prefecture
        • Otsu City
Kotora Jimboh (1899) Notes on the Minerals of Japan, p 234-235.
Kazakhstan
 
  • Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast')
    • Tarbagatai Range
      • Akzhaylyautas Mts (Akzhailyautas Mts; Akjaylautas Mts; Akzhalautas Mts)
Pavel M. Kartashov data; Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
Nigeria
 
  • Plateau State
Am Min 51:299-323
Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
Norway
 
  • Oppland
    • Lunner
      • Nordmarka
Raade, G. & Haug, J. (1980): Rare Fluorides from a soda granite in the Oslo Region, Norway. Mineralogical Record, 11, 83-91
Russia
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Buriatia (Buryatia)
        • Mama River Basin
          • Maigunda River
Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
    • Transbaikalia (Zabaykalye)
      • Chitinskaya Oblast'
P.M. Karashov data
    • Tuva Republic
Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
P.M. Kartashov data; USGS Open File Report 2005-1252 p175
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
        • Ilmen Mts
          • Ilmen Natural Reserve
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
Saint Helena
 
Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980
Ukraine
 
  • Zhytomyr Oblast' (Zhitomir Oblast')
Yurk Yu.Yu., Gurov E.P., Gurova E.P. (1973) Pecularities of fluorin mineralogy of Ukrainian crystalline shield, - Naukova Dumka, Kiev, pp.184 (in Russian).; Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
USA
 
  • Colorado
    • El Paso Co.
      • Cheyenne District (St. Peters Dome District)
Minerals of Colorado (1997) Eckel, E. B.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 112, 120; "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997
Minerals of Colorado (1997) E.B. Eckels; Am Min 51:299-323
Pavel M. Kartashov analytical data, Dean Allum specimens
Minerals of Colorado (1997) Eckels, E. B.; Am Min 51:299-323
  • Nevada
    • Mineral Co.
      • Fitting District
        • Gillis Range
Mineralogical Record: 31: 204.
  • Texas
    • Hudspeth Co.
      • Sierra Blanca Peaks
O'Neill, L. C. (2014). REE-Be-UF mineralization of the Round Top laccolith, Sierra Blanca Peaks, Trans-Pecos Texas (MS dissertation).
  • Utah
    • Juab Co.
      • Honeycomb Hills
Mineralogical Record: 12(6): 381.
  • Virginia
    • Amelia Co.
      • Winterham
[L.E. Kearns, 1995 - Mineralogical Record Vol 26 No.6 - "Alumino-Fluorides from the Morefield Pegmatite"]; Richards, R. P., Kearns, L. E., & Cook, W. R. (1998). Morphology of Chiolite twins from the Morefield mine, Amelia County, Virginia. Canadian mineralogist, 36, 1009-1016.
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