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Weberite

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About WeberiteHide

Theobald Weber
Formula:
Na2Mg[AlF6]F
Colour:
Grayish white; colourless in transmitted light.
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.96
Crystal System:
Orthorhombic
Name:
Named after Theobald Christian Fridrich Weber (September 13, 1823, København - September 3, 1886 Svendborg), a founder of the Danish cryolite industry in 1857.
This page provides mineralogical data about Weberite.


Classification of WeberiteHide

Approved, 'Grandfathered' (first described prior to 1959)
3.CB.25

3 : HALIDES
C : Complex halides
B : Neso-aluminofluorides
11.6.13.1

11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
8.6.8

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

Physical Properties of WeberiteHide

Vitreous
Transparency:
Translucent
Colour:
Grayish white; colourless in transmitted light.
Streak:
White
Hardness:
3½ on Mohs scale
Cleavage:
Poor/Indistinct
On {101} poor; on {010} indistinct.
Fracture:
Irregular/Uneven
Density:
2.96 g/cm3 (Measured)    2.966 g/cm3 (Calculated)

Optical Data of WeberiteHide

Type:
Biaxial (+)
RI values:
nα = 1.344 - 1.346 nβ = 1.346 - 1.348 nγ = 1.347 - 1.350
2V:
Measured: 83° (3), Calculated: 88°
Max Birefringence:
δ = 0.003 - 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
none

Chemical Properties of WeberiteHide

Formula:
Na2Mg[AlF6]F
IMA Formula:
Na2MgAlF7

Crystallography of WeberiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Immm
Cell Parameters:
a = 7.31 Å, b = 7.06 Å, c = 9.99 Å
Ratio:
a:b:c = 1.035 : 1 : 1.415
Unit Cell V:
515.57 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Irregular grains and masses. Inclusions in cryolite.
Twinning:
With [111] as twin axis and {011} as composition plane, commonly as contact twins

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
1.779 (10)
2.95 (9)
2.89 (9)
5.05 (6)
5.89 (5)
2.30 (5)
1.542 (5)

Type Occurrence of WeberiteHide

Place of Conservation of Type Material:
University of Copenhagen, Copenhagen, Denmark, 1981.936
Geological Setting of Type Material:
cryolite deposit and overlying pegmatite
Associated Minerals at Type Locality:

Other Language Names for WeberiteHide

German:Weberit
Spanish:Weberita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Quartz7 photos of Weberite associated with Quartz on mindat.org.
Sericite6 photos of Weberite associated with Sericite on mindat.org.
Fluorite6 photos of Weberite associated with Fluorite on mindat.org.
Muscovite6 photos of Weberite associated with Muscovite on mindat.org.
Baryte5 photos of Weberite associated with Baryte on mindat.org.
Gearksutite5 photos of Weberite associated with Gearksutite on mindat.org.
Cryolite5 photos of Weberite associated with Cryolite on mindat.org.
Jørgensenite5 photos of Weberite associated with Jørgensenite on mindat.org.
Topaz4 photos of Weberite associated with Topaz on mindat.org.
Thomsenolite3 photos of Weberite associated with Thomsenolite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

3.CB.05CryolithioniteNa3Li3[AlF6]2Iso. m3m (4/m 3 2/m) : Ia3d
3.CB.15CryoliteNa2NaAlF6Mon. 2/m
3.CB.15ElpasoliteK2NaAlF6Iso. m3 (2/m 3) : Pa3
3.CB.15SimmonsiteNa2LiAlF6Mon.
3.CB.20ColquiriiteCaLi[AlF6]Trig.
3.CB.30KarasugiteSrCa[Al(F,OH)7]Mon.
3.CB.35UsoviteBa2CaMgAl2F14Mon.
3.CB.40PachnoliteNaCa[AlF6] · H2OMon. 2/m
3.CB.40ThomsenoliteNaCa[AlF6] · H2OMon. 2/m : P21/b
3.CB.45CarlhintzeiteCa2[AlF6]F · H2OTric.
3.CB.50YaroslaviteCa3Al2F10(OH)2 · H2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.6.1ZharchikhiteAlF(OH)2Mon.
8.6.2ChloraluminiteAlCl3 · 6H2OTrig.
8.6.3CadwaladeriteAlCl(OH)2 · 4H2OAmor.
8.6.4CryolithioniteNa3Li3[AlF6]2Iso. m3m (4/m 3 2/m) : Ia3d
8.6.5CryoliteNa2NaAlF6Mon. 2/m
8.6.6ChioliteNa5Al3F14Tet. 4/mmm (4/m 2/m 2/m) : P4/mnc
8.6.7ElpasoliteK2NaAlF6Iso. m3 (2/m 3) : Pa3
8.6.9Hydrokenoralstonite Na0.5(Al,Mg)2(F,OH)6•H2O Iso. m3m (4/m 3 2/m) : Fd3m
8.6.10KoeneniteNa4Mg9Al4Cl12(OH)22Trig. 3m (3 2/m) : R3m
8.6.11 Chlor-manasseiteMgxAl(OH)2x+2Cl · (x-0.8)H2O
x about 1.75
8.6.12GearksutiteCa[Al(F,OH)5(H2O)]Tric. 1 : P1
8.6.13ProsopiteCaAl2F4[(OH)4-xFx], x = 0.0–1.0Mon. 2/m : B2/b
8.6.14YaroslaviteCa3Al2F10(OH)2 · H2OOrth.
8.6.15CarlhintzeiteCa2[AlF6]F · H2OTric.
8.6.16ColquiriiteCaLi[AlF6]Trig.
8.6.17ThomsenoliteNaCa[AlF6] · H2OMon. 2/m : P21/b
8.6.18PachnoliteNaCa[AlF6] · H2OMon. 2/m
8.6.19Zirklerite(Fe,Mg,Ca)9Al4Cl18(OH)12 · 14H2O (?)Trig.

Other InformationHide

Notes:
Slightly soluble in water. Readily soluble in an AlCl3 solution.
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 WeberiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bøgvad R (1938) Weberite, a new mineral from Ivigtut. Meddelelser om Grønland 119, 3-11
Foshag W F (1939) New mineral names. American Mineralogist (1939): 24: 278.
Brosset (1943) American Chemical Society: 37: 13.
Ferguson (1949) American Mineralogist: 34: 383.
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: 127-128.
Giuseppetti G, Tadini C (1978) Re-examination of the crystal structure of weberite. Tschermaks Mineralogische und Petrographische Mitteilungen (1978): 25: 57-62.
Journal of Solid State Chemistry (1982): 43: 213.
Caramanian A, Souron J P, Gredin P, de Kozak A (2001) The crystal structure of the weberite Na2MgInF7. Journal of Solid State Chemistry 159, 234-238

Internet Links for WeberiteHide

Localities for WeberiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Antarctica
 
  • Western Antarctica
    • Antarctic Peninsula
      • South Shetland Islands
Viramonte, J.G., Sureda, R.J., Bossi, G.E., Fourcade, N.H., Omarini, R.H., Geochemical and mineralogical study of the high temperature fumaroles from Decepcion Island, South Shetland, Antarctica. Inst. Assoc. of Volc. and chemistry of the erath interior. Symposium Andean and Antarctic Volcanology Problems. Chile (1974).
Australia
 
  • South Australia
    • Eyre Peninsula
      • Middleback Range
        • Iron Knob
  • Tasmania
    • Waratah-Wynyard municipality
      • Waratah district
        • Waratah
Bottrill
Denmark (TL)
 
  • Greenland
    • Sermersooq
      • Arsuk Fjord
        • Ivittuut (Ivigtut)
Meddelelser om Grønland (1938), 119(7), 1; 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, 128.;Petersen, O.V. and Secher, K. (1993): The minerals of Greenland. Mineralogical Record 24 (2): 1-65 (p.36)
Finland
 
  • Kymenlaakso
    • Kotka
Ilkka Mikkola collection; Lahti, Seppo I. 2012. Kotkan topaasilouhoksesta ja sen mineraaleista. Kivi-lehti 4. 6-23
Kazakhstan
 
  • East Kazakhstan
    • Tarbagatai Range
      • Akzhaylyautas Mts (Akzhailyautas Mts; Akjaylautas Mts; Akzhalautas Mts)
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.
Russia
 
  • Zabaykalsky Krai
    • Chitinskaya Oblast
Starikova, Sharygin, V.V. (2015): Ba-dominant fluoroaluminates from the Katugin rare-metal deposit (Transbaikalia, Russia): chemical and Raman data. XXXII International Conference "Alkaline Magmatism of the Earth and Related Strategic Metal Deposits", August 7-14, Apatity, Kola, Russia
Ukraine
 
  • Zhytomyr 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
    • Boulder Co.
      • Jamestown District
Minerals of Colorado (1997) E.B. Eckel
    • El Paso Co.
      • Cheyenne District (St. Peters Dome District)
Minerals of Colorado (1997) Eckel, E. B.
        • St Peters Dome
Minerals of Colorado (1997) Eckel, E. B.; Am Min 51:299-323
    • Fremont Co.
"Minerals of Colorado, updated & revised", p. 16, by Eckel, Edwin B., 1997; Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F
  • Nevada
    • Mineral Co.
      • Fitting District
        • Gillis Range
Mineralogical Record: 31: 204.
Mineral and/or Locality  
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