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Prosopite

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About ProsopiteHide

Formula:
CaAl2F4[(OH)4-xFx]
x = 0.0–1.0
Colour:
Greyish, white; colourless in transmitted light.
Lustre:
Vitreous, Dull
Hardness:
Specific Gravity:
2.88 - 2.894
Crystal System:
Monoclinic
Name:
From the Greek προσωπείον, a mask, in allusion to the deceptive character of the mineral (as pseudomorphs).
Prosopite can form as an alteration product of topaz in topaz-rich greisens (as in Altenberg, Saxony and Schlaggenwald, Bohemia), and in cryolite-bearing pegmatites, either as a primary mineral or as an alteration product of cryolite.


Classification of ProsopiteHide

Approved, 'Grandfathered' (first described prior to 1959)
3.CD.10

3 : HALIDES
C : Complex halides
D : Ino-aluminofluorides
11.6.9.1

11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
8.6.13

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

Physical Properties of ProsopiteHide

Vitreous, Dull
Transparency:
Transparent, Translucent
Colour:
Greyish, white; colourless in transmitted light.
Hardness:
4½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {111}.
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.88 - 2.894 g/cm3 (Measured)    2.898 g/cm3 (Calculated)

Optical Data of ProsopiteHide

Type:
Biaxial (+)
RI values:
nα = 1.501 nβ = 1.503 nγ = 1.510
2V:
Measured: 62° , Calculated: 58°
Max Birefringence:
δ = 0.009
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none

Chemical Properties of ProsopiteHide

Formula:
CaAl2F4[(OH)4-xFx]

x = 0.0–1.0
IMA Formula:
CaAl2F4(OH)4

Crystallography of ProsopiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 6.7103(3) Å, b = 11.1619(5) Å, c = 7.374(3) Å
β = 94.919(2)°
Ratio:
a:b:c = 0.601 : 1 : 0.661
Unit Cell V:
550.28 ų (Calculated from Unit Cell)
Morphology:
Crystals somewhat tabular {010}. Massive, granular to powdery.
Comment:
Cell from Hongu et al. (2018). Previously given: 6.68, 11.19, 7.38 Å, 94.93°

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012448ProsopitePudovkina Z V, Pyatenko Y A (1970) About the structure of the prosopite, Ca[Al2F4(OH)4], and about some features of the fluoroaluminate crystal chemistry Doklady Akademii Nauk SSSR 190 665-66719700293
0014057ProsopitePudovkina Z V, Chernitsova N M, Pyatenko Y A (1973) Refinement of the crystalline structure of prosopite, CaAl2F4(OH)4 Journal of Structural Chemistry 14 345-34719730293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
4.35 Å(10)
3.24 Å(4)
3.07 Å(5)
2.13 Å(6)
1.913 Å(5)
1.837 Å(6)
1.813 Å(6)

Geological EnvironmentHide

Geological Setting:
Topaz-bearing greisens, porphyry, and in cryolite pegmatites.

Type Occurrence of ProsopiteHide

Geological Setting of Type Material:
Topaz-bearing greisen.
Associated Minerals at Type Locality:

Other Language Names for ProsopiteHide

Common AssociatesHide

ApatiteCa5(PO4)3(Cl/F/OH)
FluoriteCaF2
KaoliniteAl2(Si2O5)(OH)4
QuartzSiO2
Associated Minerals Based on Photo Data:
16 photos of Prosopite associated with ThomsenoliteNaCa[AlF6] · H2O
9 photos of Prosopite associated with Hydrokenoralstonite Na0.5(Al,Mg)2(F,OH)6 · H2O
7 photos of Prosopite associated with CryoliteNa2NaAlF6
6 photos of Prosopite associated with FluoriteCaF2
6 photos of Prosopite associated with AmazoniteK(AlSi3O8)
6 photos of Prosopite associated with QuartzSiO2
5 photos of Prosopite associated with KaoliniteAl2(Si2O5)(OH)4
5 photos of Prosopite associated with GearksutiteCa[Al(F,OH)5(H2O)]
5 photos of Prosopite associated with Smoky QuartzSiO2
4 photos of Prosopite associated with SideriteFeCO3

Related Minerals - Nickel-Strunz GroupingHide

3.CD.05RosenbergiteAlF[F0.5(H2O)0.5]4 · H2OTet. 4/m : P4/n

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.6.1ZharchikhiteAlF(OH)2Mon.
8.6.2ChloraluminiteAlCl3 · 6H2OTrig.
8.6.3CadwaladeriteAl5(H2O)3(OH)12 · n(Cl,H2O)Amor.
8.6.4CryolithioniteNa3Al2(LiF4)3Iso. 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
8.6.8WeberiteNa2Mg[AlF6]FOrth. mmm (2/m 2/m 2/m) : Immm
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
8.6.14YaroslaviteCa3Al2F10(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:
Decomposed by 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 ProsopiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Charpentier (1799) Beob. über die Lagerst. der Erze, Leipzig: 32 (as Speckstein).
Breithaupt (1815) Über die Aechtheit der Kryst., Freiberg: 29.
Scheerer, T. (1853) Ueber Pseudomorphosen, nebst Beiträgen zur Charakteristik einiger Arten derselben.- Poggendorffs Annalen der Physik und Chemie: 90: 315-323 (as Prosopit).
Scheerer, T. (1854) Poggendorffs Annalen der Physik und Chemie: 92: 612 (as Prosopit).
Scheerer, T. (1857) Poggendorffs Annalen der Physik und Chemie: 101: 361 (as Prosopit).
Groth (1883) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 7: 487.
Cross and Hillebrand (1885) USGS Bull. 20: 62.
Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 178.
Hillebrand (1899) American Journal of Science: 7: 54.
Goldschmidt, V. (1920) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 6: 176.
Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 123.
Palache, C., Berman, H., and 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: 121-122.
Neues Jahrbuch für Mineralogie, Monatshefte (1986): 7: 329-335.
Hongu, H., Yoshiasa, A., Teshima, A., Isobe, H., Sugiyama, K., Arima, H., Nakatsuka, A., Momma, K., Miyawaki, R. (2018) Crystal structure refinement and chemical formula of prosopite, CaAl2F4[(OH)4−xFx] x = 0.0–1.0. Journal of Mineralogical and Petrological Sciences: 113: 152-158.

Internet Links for ProsopiteHide

Localities for ProsopiteHide

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.
Australia
 
  • Tasmania
    • Waratah-Wynyard municipality
      • Waratah district
        • Waratah
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: 122; Bottrill
Bolivia
 
  • La Paz
    • Inquisivi Province
      • Colquiri
Raman spectroscopy by Joy Desor
Canada
 
  • British Columbia
    • Golden Mining Division
      • Rock Canyon Creek
Jennifer Pell (1994) Carbonatites, Nepheline Syenites, Kimberlites and Related Rocks in British Columbia. Brithish Columbia Ministry of Energy Bulletin 88.
China
 
  • Jiangxi
    • Yingtan
      • Guixi Co.
        • Shengyuan Uranium ore field (Yingtan Uranium ore field)
Dahlkamp, F.J., Ed. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156
Dahlkamp, F.J., Ed. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156
Czech Republic
 
  • Karlovy Vary Region
    • Sokolov District
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: 122.
Finland
 
  • Kymenlaakso
    • Kotka
Ilkka Mikkola collection
Lahti Seppo I. 2011. Kotkan topaasilouhoksesta ja sen mineraaleista. Kivi-lehti 4.
Germany
 
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Oberwolfach
Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); KOLITSCH, U. (1997): Ianthinit und weitere Neufunde aus der Grube Clara im mittleren Schwarzwald. - Erzgräber 11 (2), 76-88.
  • Saxony
    • Sächsische Schweiz-Osterzgebirge
      • Altenberg
T. Scheerer (1853): Ueber Pseudomorphosen, nebst Beiträgen zur Charakteristik einiger Arten derselben.- Poggendorffs Annalen der Physik und Chemie 90, 315-323; 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: 122; Lapis 35 (5) (2010) 45-46.
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (I). Mineralien-Welt 25 (1), 60-75 (in German). [identification announced; no description given yet]
          • Agios Konstantinos (Kamariza)
            • Mercati mines
Rieck, B., Kolitsch, U., Voudouris, P., Giester, G. and Tzeferis, P. (2018): Weitere Neufunde aus Lavrion, Griechenland. Mineralien-Welt 29 (5), 32-77 (in German).
Greenland
 
  • 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.; Petersen, O.V. and Secher, K. (1993): The minerals of Greenland. Mineralogical Record 24 (2): 1-65 (p.36)
Kazakhstan
 
  • East Kazakhstan
    • Tarbagatai Range
      • Akzhaylyautas Mts (Akzhailyautas Mts; Akjaylautas Mts; Akzhalautas Mts)
Pavel M. Kartashov data
  • Karaganda Region
    • Balkhash
      • Kounrad Massif
Chen Xuanhua, Qu Wenjun, Han Shuqin, Seitmuratova, E., Yang Nong, Chen Zhengle, Zeng Fagang, Du Andao, and Wang Zhihong (2010): Geoscience Frontiers 1(1), 115-124
    • Karkaraly
http://geo.web.ru/druza/l-Kent.htm
Mexico
 
  • Zacatecas
    • Mazapil Municipality
      • Noche Buena
Rob Lavinsky
      • Rancho Santa Rosa
Panczner (1987): 143-398.
Namibia
 
  • Oshikoto Region
    • Tsumeb
Keller, P. & Innes, J. (1986): "Neue Minerale von Tsumeb." Lapis, 11 (9), 28-32.
Poland
 
  • Silesian Voivodeship
    • Wodzisław County
      • Rydułtowy
        • ROW Ruch Rydułtowy Mine
Kruszewski, Ł., Fabiańska, M.J., Ciesielczuk, J., Segit, T., Orłowski, R., Motyliński, R., Kusy, D., Moszumańska, I., 2018. First multi-tool exploration of a gas-condensate-pyrolysate system from the environment of burning coal mine heaps: An in situ FTIR and laboratory GC and PXRD study based on Upper Silesian materials. Science of the Total Environment, 640-641 (1 November 2018), 1044-1071; https://doi.org/10.1016/j.scitotenv.2018.05.319
Russia
 
  • Chelyabinsk Oblast
    • Ilmen Mountains
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.
  • Zabaykalsky Krai
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; E. V. Sklyarov, D. P. Gladkochub, A. B. Kotov, A. E. Starikova, V. V. Sharygin, S. D. Velikoslavinsky, A. M. Larin, A. M. Mazukabzov, E. V. Tolmacheva, E. A. Khromova (2016): Genesis of the Katugin rare-metal ore deposit: Magmatism versus metasomatism. Russian Journal of Pacific Geology 10, 155–167.; Starikova, A. E., Bazarova, E. P., Savel’eva, V. B., Sklyarov, E. V., Khromova, E. A., & Kanakin, S. V. (2019) Pyrochlore-Group Minerals in the Granite-Hosted Katugin Rare-Metal Deposit, Transbaikalia, Russia. Minerals, 9(8), 490.; Starikova, A.E., Sharygin, V.V. Sklyarov, E.V. (2017) Ba-dominant fluoroaluminates from the Katugin rare-metal deposit (Transbaikalia, Russia). Doklady Earth Sciences: 472: 67–71.
Ripp, G. S., Bulnaev, K. B. & Zyablishchev, A. Yu. (1996): Alumofluorides of Zharchikhinskoe molybdenum deposit (western Transbaikalia). Zap. Vseross. Mineral. O-va. 125, 72-79. (in Russian) ; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
South Africa
 
  • Gauteng
    • Pretoria District (Tshwane District)
Cairncross, B., Dixon, R. (1995) Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Geological Society of South Africa, PO Box 44283, Linden 2104, South Africa.; Rocks & Minerals 83:5 pp 410-421
  • North West
    • Bojanala Platinum District
      • Brits (Brits District)
Atanasova, M., Cairncross, B. and Windisch, W.R. (2016) Microminerals of the Bushveld Complex, South Africa. Popular Geoscience Series 6, Council for Geoscience, Pretoria, South Africa, pg 181
UK
 
  • England
    • North Yorkshire
      • Harrogate
        • High and Low Bishopside
          • Greenhow
Young, B.; Ryback, G.; Braithwaite, R. S. W.; Francis, J. G. (1997): Prosopite, doyleite and otavite from Coldstones quarry, Pateley bridge, North Yorkshire. Mineralogical Magazine 61, 895-897.
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
 
  • Arizona
    • Gila Co.
      • Globe-Miami Mining District
        • Miami-Inspiration Mining District
          • Top of the World
Confirmed by Raman spectroscopy at the University of Arizona.
    • Graham Co.
      • Aravaipa Mining District
        • Klondyke
          • Grand Reef Mountain
            • Laurel Canyon
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 335.
    • La Paz County
      • Plomosa Mountains
        • Plomosa Mining District
          • Bouse
            • Bouse area
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 335.
  • Colorado
    • El Paso Co.
      • Cheyenne Mining District (St. Peters Dome Mining District)
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: 122; Kearns, 1995 - "Alumino-Fluorides from the Morefield Pegmatite", Mineralogical Record 26 551-557.
Am Min 51:299-323
Pavel M. Kartashov analytical data, Allum Dean specimens
Minerals of Colorado (1997) Eckel, E. B.; Am Min 51:299-323; American Mineralogist (1936): 20: 319-333
    • 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 Mining District
        • Gillis Range
Mineralogical Record: 31: 204.
  • New Mexico
    • Doña Ana Co.
      • Franklin Mountains
        • Northern Franklin Mountains
New Mexico Geology v. 25
    • Sierra Co.
      • San Mateo Mountains District
Jerry Cone Collection
  • Utah
    • Tooele Co.
      • Dugway Range
        • Dugway Mountains Mining District
UGMS Bull 117 Minerals and Mineral Localities of Utah
      • Wildcat Mountain
UGMS Bull 117 Minerals and Mineral Localities of Utah
  • Virginia
    • Amelia Co.
      • Winterham
Kearns, L.E. (1995) Alumino-fluorides from the Morefield pegmatite, Amelia County, Virginia. The Mineralogical Record: 26(6): 551-556.; Richards, R.P., Kearns, L.E., Cook, W.R. (1998) Morphology of Chiolite twins from the Morefield mine, Amelia County, Virginia. The Canadian Mineralogist: 36: 1009-1016.
  • Wisconsin
    • Marathon Co.
      • Wausau Intrusive Complex
        • Nine Mile pluton
Rocks & Min. (2007) 82:233
 
Mineral and/or Locality  
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