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About CreediteHide

Ca3SO4Al2F8(OH)2 · 2H2O
white, violet, colourless; colourless in transmitted light.
Specific Gravity:
2.713 - 2.73
Crystal System:
After the type locality, in the Creede quadrangle, Colorado.
A complex aluminium salt. Compare the chemically related chukhrovite-(Ca) and kruijenite.

Visit gemdat.org for gemological information about Creedite.

Classification of CreediteHide

Approved, 'Grandfathered' (first described prior to 1959)

C : Complex halides
G : Aluminofluorides with CO3, SO4, PO4

1 : Miscellaneous

26 : Sulphates with Halide

Physical Properties of CreediteHide

white, violet, colourless; colourless in transmitted light.
On {100}.
2.713 - 2.73 g/cm3 (Measured)    2.715 g/cm3 (Calculated)

Optical Data of CreediteHide

Biaxial (-)
RI values:
nα = 1.461 nβ = 1.478 nγ = 1.485
Max Birefringence:
δ = 0.024
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r > v strong

Chemical Properties of CreediteHide

Ca3SO4Al2F8(OH)2 · 2H2O
IMA Formula:
Ca3Al2(SO4)(OH)2F8 · 2H2O

Crystallography of CreediteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 13.936(1) Å, b = 8.606(1) Å, c = 9.985(1) Å
β = 94.39(1)°
a:b:c = 1.619 : 1 : 1.16
Unit Cell V:
1,194.02 ų (Calculated from Unit Cell)
Crystals short prismatic to acicular [001]; commonly with {111} and {111} or {111} alone as the dominant terminal forms. Crystals may measure up to 8 cm. Radiated aggregates; drusy, veruginous masses; embedded grains and crystals.

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
7.3 Å(9)
6.9 Å(9)
5.79 Å(8)
3.92 Å(9)
3.48 Å(10)
3.07 Å(8)
2.161 Å(9)

Type Occurrence of CreediteHide

Geological Setting of Type Material:
Upper portions of a fluorite-baryte vein.
Associated Minerals at Type Locality:

Synonyms of CreediteHide

Other Language Names for CreediteHide

Simplified Chinese:铝氟石膏
Traditional Chinese:氟鋁石膏

Common AssociatesHide

Associated Minerals Based on Photo Data:
92 photos of Creedite associated with FluoriteCaF2
14 photos of Creedite associated with QuartzSiO2
14 photos of Creedite associated with GearksutiteCa[Al(F,OH)5(H2O)]
8 photos of Creedite associated with SmithsoniteZnCO3
5 photos of Creedite associated with ChalcedonySiO2
4 photos of Creedite associated with Opal-ANSiO2 · nH2O
4 photos of Creedite associated with CarbonatecyanotrichiteCu4Al2(CO3,SO4)(OH)12 · 2H2O
4 photos of Creedite associated with SeleniteCaSO4 · 2H2O
3 photos of Creedite associated with CelestineSrSO4
3 photos of Creedite associated with Chukhrovite-(Y)Ca3(Y,Ce)(AlF6)2(SO4)F · 10H2O

Related Minerals - Nickel-Strunz GroupingHide

3.CG.3.CG.Chukhrovite-(Ca)Ca4.5Al2(SO4)F13·12H2OIso. m3 (2/m 3) : Fd3
3.CG.05Stenonite(Sr,Ba,Na)2Al(CO3)F5Mon. 2/m
3.CG.10Chukhrovite-(Ce)Ca3(Ce,Y)(AlF6)2(SO4)F · 10H2OIso.
3.CG.10Chukhrovite-(Y)Ca3(Y,Ce)(AlF6)2(SO4)F · 10H2OIso.
3.CG.10MeniayloviteCa4[(SO4)(SiF6)(AlF6)]F · 12H2OIso. m3 (2/m 3) : Fd3
3.CG.10Chukhrovite-(Nd)Ca3(Nd,Y)Al2(SO4)F13·12H2OIso. m3 (2/m 3) : Fd3
3.CG.25ThermessaiteK2AlF3(SO4)Orth. mmm (2/m 2/m 2/m) : Pbcn

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

26.2SulphohaliteNa6(SO4)2FClIso. m3m (4/m 3 2/m)
26.3SchaireriteNa21(SO4)7ClF6Trig. 3m (3 2/m)
26.5ConnelliteCu19(SO4)(OH)32Cl4 · 3H2OHex. 6 m2 : P62c
26.6ChlorothioniteK2Cu(SO4)Cl2Orth. mmm (2/m 2/m 2/m) : Pnma
26.7KamchatkiteKCu3(SO4)2OClOrth. mmm (2/m 2/m 2/m) : Pnma
26.8SpangoliteCu6Al(SO4)(OH)12Cl · 3H2OTrig. 3m : P3 1c
26.9AubertiteCuAl(SO4)2Cl · 14H2OTric. 1
26.10Magnesioaubertite(Mg,Cu)Al(SO4)2Cl · 14H2OTric. 1 : P1
26.11Svyazhinite(Mg,Mn2+,Ca)(Al,Fe3+)(SO4)2F · 14H2OTric.
26.14KainiteKMg(SO4)Cl · 3H2OMon. 2/m : B2/m
26.15Mosesite(Hg2N)(Cl,SO4,MoO4) · H2OIso.
26.16Kleinite(Hg2N)(Cl,SO4) · nH2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
26.17WilcoxiteMgAl(SO4)2F · 17H2OTric. 1 : P1
26.19LannoniteMg2Ca4Al4(SO4)8F8 · 24H2O Tet. 4/m : I4/m
26.20Chukhrovite-(Y)Ca3(Y,Ce)(AlF6)2(SO4)F · 10H2OIso.
26.21Chukhrovite-(Ce)Ca3(Ce,Y)(AlF6)2(SO4)F · 10H2OIso.
26.22GrandreefitePb2(SO4)F2Mon. 2/m
26.23PseudograndreefitePb6(SO4)F10Orth. 2 2 2 : F2 2 2
26.26MammothitePb6Cu4AlSb5+O2(OH)16Cl4(SO4)2Mon. 2 : B2
26.27AtlasoviteK(BiO)Cu6Fe3+(SO4)5O3ClTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
26.28XitieshaniteFe3+(SO4)Cl · 6H2OMon. 2/m : P21/b

Other InformationHide

Slowly soluble in acids.
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 CreediteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Larsen and Wells (1916) Proceedings of the National Academy of Sciences, Washington: 2: 360.
Foshag, W.F. (1922): The crystallography and chemical composition of creedite. Proceedings of the U.S. National Museum 59, 419-424.
American Mineralogist (1932): 17: 75.
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: 129-130.
Giuseppetti, G. and Tadini, C. (1983): Structural analysis and refinement of Bolivian creedite, Ca3Al2F8(OH)2(SO4)•2H2O. Neues Jahrbuch für Mineralogie, Monatshefte 1983, 69-78.
Robert Cook (2008) Connoisseur's Choice Creedite Cresson Mine, Cripple Creek, Teller County, Colorado. Rocks & Minerals 81:5 422-426.
D. A. Ksenofontov, Yu. K. Kabalov, N. V. Zubkova, and R. R. Shiyapova (2011): Structure refinement and thermal stability of creedite. Iorganic Materials, 47, 1402-1405.

Internet Links for CreediteHide

Localities for CreediteHide

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.
  • Queensland
    • Cloncurry Shire
      • Cloncurry
I.D. by Peter Elliott
  • La Paz
    • Inquisivi Province
      • Colquiri
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: 130.
  • Potosí
    • Rafael Bustillo
      • Llallagua
Mineralogical Record: 32: 474.; Hyrsl, J. & A. Petrov (2006): Famous Mineral Localities: Llallagua, Bolivia. Mineralogical Record. 37: 117-162
  • Guizhou
    • Qianxinan
      • Qinglong County
        • Dachang Sb ore field
www.johnbetts-fineminerals.com + Ottens, B. (2006): Antimonit aus China. LAPIS 31 (2), 23-34
  • Hunan
    • Loudi
      • Lengshuijiang Co.
Mingyue He, Ya'er Lou, and Pu Wang (2002): Mineral Deposits 21(suppl.), 384-387
  • Grand Est
    • Bas-Rhin
      • Sélestat-Erstein
        • Sélestat
          • Orschwiller
J.-L. Hohl: "Minéraux et Mines du Massif Vosgien", Editions du Rhin (Mulhouse), 1994
    • Haut-Rhin
      • Colmar-Ribeauvillé
        • Bergheim
J.-L. Hohl: "Minéraux et Mines du Massif Vosgien", Editions du Rhin (Mulhouse), 1994
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion Mining District
          • Agios Konstantinos (Kamariza)
No reference listed
LAPIS 24 (7/8) 1999; Wendel, W. and Markl, G. (1999) Lavrion: Mineralogische Klassiker und Raritäten für Sammler. LAPIS 24 (7/8):34-52
            • 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).
          • Legrena Valley
            • Megala Pefka Mines
Branko Rieck collection
          • Sounion
            • Cato Sounio mines
Lapis, 24, 7/8 (1999)
        • Lavrion slag localities
          • Sounion area
Schnorrer-Köhler, G., Standfuss, K. & Standfuss, L. (1985): Neue Schlackenmineralien von Lavrion. Lapis, 10 (5), 13-16; 50.
  • Sardinia
    • Nuoro Province
      • Gadoni
Stara, P., Rizzo, R., Sabelli, C., Ibba, A. (1999): I minerali di Funtana Raminosa. Rivista Mineralogica Italiana, 1/1999, 10-27.
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
SEM-EDX quantitative analysis - M.E.Ciriotti 2011
  • Tuscany
    • Livorno Province
      • Campigliese (Campiglia Mountains; Campiglia Ridge)
        • Campiglia Marittima
Jansen, H. & van den Berg, W. (1998): Slakkenmineralen in Toscane (Italië). Gea, no. 4, 109-117 (in Dutch).
  • East Kazakhstan
    • Oskemen
    • 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.
  • Karaganda Region
    • Karazhal
      • Betpakdala Desert (Bet-Pak-Dal Desert)
Rocks & Minerals 81:5 422-426; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pautov et al (2005) New Data on Minerals Vol 40 pp5-10; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
    • Shet
      • Akchatau (Aqshatau; Akschatau; Akchataul; Akshatau)
Rocks & Minerals 81:5 422-426; Cooper, Michael P.(1997) What’s New in Minerals, Munich Show 1996. Mineralogical Record 28:137; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
      • Kayrakty (Kairakty)
Laznicka, P. (2010): Giant Metallic Deposits, 2nd ed. Springer (Berlin, Heidelberg), p. 237.
Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
  • Chihuahua
Personal collecting experience
        • East Camp
Megaw, P.K.M., 1990b, Geology and geochemistry of the Santa Eulalia mining district, Chihuahua, Mexico.: Unpublished Ph.D. Thesis, Univ. of Arizona, 549 p
No reference listed
          • Francisco Portillo
Panczner (1987): 150, 210, 220.; Panczner (1987):94-366.
  • Durango
    • Rodeo Municipality
      • Rodeo
        • Abasolo
Rocks & Minerals 83:5 pp 422-426; Rob Lavinsky
South Africa
  • Northern Cape
    • Kalahari manganese field
      • Kuruman
        • N'Chwaning Mines
[Von Bezing, K. L. et al. (1991) - The Kalahari (Afrique du Sud) manganese field : an update, Mineralogical Record, 22 (3), 279-302.]
Minerals of South Africa
  • Gorno-Badakhshan
Rocks & Minerals 81:5 422-426
  • Arizona
    • Graham Co.
      • Aravaipa Mining District
        • Santa Teresa Mountains
          • Aravaipa
            • Landsman Camp (Landsman group)
Wilson, W.E. (1988), The Iron Cap Mine, Min.Rec.: 19(2): 81-87.
          • Klondyke
            • Grand Reef Mountain
              • Laurel Canyon
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 192.
  • California
    • Inyo Co.
      • Darwin Hills
MinRec 15:5
          • Darwin
Pabst, Adolf (1952), A new locality for creedite: Rocks & Minerals: 27: 19; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 190.
Rocks & Minerals 83:5 pp 422-426
Rocks & Minerals 83:5 pp 422-426
      • Panamint Mts (Panamint Range)
        • Panamint Mining District (Ballarat Mining District)
          • Panamint (old Panamint)
Hall, Wayne Everett & E.M. Mackevett (1958), Economic geology of the Darwin quadrangle, Inyo County, California: Calif Division of Mines Special Report 51, 77 pp.: 18; Hall, Wayne Everett & Edward M. Mackevett (1963), Geology and ore deposits of the Darwin quadrangle, Inyo County, California: USGS PP 368: 64; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 162.
    • San Bernardino Co.
      • Ord Mining District
        • Ord Mountains
          • Ord Mountain
            • Ord Mountain Mine (Ord Mountain Mine System; Ord Mine; Ord Mountain deposits; Osborn; Rio Vista claim; Brilliant claim; Josephine claim; Belgium claim; Copper Junction claim)
Housley, Robert M. and Adams, Paul M. (1999), Toward a Mineralogical Investigation of Ord Mountain, San Bernardino County California: San Bernardino County Museum Quarterly 46, p. 75-79
  • Colorado
    • Clear Creek Co.
      • Dailey Mining District (Jones Pass Mining District)
Rocks & Minerals 83:5 pp 422-426
    • Mineral Co.
      • Wagon Wheel Gap
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: 130; "Minerals of Colorado, updated & revised", p. 172, by Eckel, Edwin B., 1997; Rocks & Min.:10:84-85.
    • Teller Co.
      • Cripple Creek Mining District
        • Cripple Creek
Min Rec 36:2 pp143-185; 2009 New Mexico Mineral Symposium abstracts
  • Nevada
    • Churchill Co.
      • Lake Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
      • Mountain Wells Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Douglas Co.
      • Wellington Hills
        • Silver Glance Mining District (Wellington Mining District)
          • Wellington
NBMG Spec. Pub. 31 Minerals of Nevada
    • Esmeralda Co.
Rocks & Minerals, Nov. 1999
      • Rock Hill Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
    • Humboldt Co.
      • Iron Point Mining District
        • Valmy
Dr. William S. Wise presentation to Northwest Micro Mineral Study Group on 1 May 2004, Update on Mineralogy of the Silver Coin Mine, Iron Point District, Edna Mountains, Humboldt Co., Nevada; Silver Coin Mine. Compact Disc. Paul Adams
    • Nye Co.
      • Lodi Hills
        • Lodi Mining District
          • Granite camp
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: 130; NBMG Spec. Pub. 31 Minerals of Nevada
      • San Antonio Mountains
        • San Antone Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
        • Tonopah Mining District
Knut Edvard Larsen collection # MM-657; Henderson, B. (1986): Microminerals. Mineralogical Record, 17 (4), 272
  • New Mexico
    • Socorro Co.
Northrop, Minerals of New Mexico, 3rd Rev. ed., 1996
        • Bingham
Minerals of New Mexico 3rd ed.
[Mineralogical Record 30:337]
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