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Creedite

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About CreediteHide

Formula:
Ca3SO4Al2F8(OH)2 · 2H2O
Colour:
white, violet, colourless; colourless in transmitted light.
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.713 - 2.73
Crystal System:
Monoclinic
Name:
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)
3.CG.15

3 : HALIDES
C : Complex halides
G : Aluminofluorides with CO3, SO4, PO4
12.1.4.1

12 : COMPOUND HALIDES
1 : Miscellaneous
26.18

26 : Sulphates with Halide

Physical Properties of CreediteHide

Vitreous
Transparency:
Transparent
Colour:
white, violet, colourless; colourless in transmitted light.
Streak:
white
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
On {100}.
Fracture:
Conchoidal
Density:
2.713 - 2.73 g/cm3 (Measured)    2.715 g/cm3 (Calculated)

Optical Data of CreediteHide

Type:
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:
Moderate
Dispersion:
r > v strong

Chemical Properties of CreediteHide

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

Crystallography of CreediteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 13.936(1) Å, b = 8.606(1) Å, c = 9.985(1) Å
β = 94.39(1)°
Ratio:
a:b:c = 1.619 : 1 : 1.16
Unit Cell V:
1,194.02 ų (Calculated from Unit Cell)
Z:
4
Morphology:
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:
d-spacingIntensity
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

Dutch:Creediet
Italian:Creedite
Russian:Кридит
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.20BøggilditeNa2Sr2Al2PO4F9Mon.
3.CG.25ThermessaiteK2AlF3(SO4)Orth. mmm (2/m 2/m 2/m) : Pbcn

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

26.1KogarkoiteNa3(SO4)FMon.
26.2SulphohaliteNa6(SO4)2FClIso. m3m (4/m 3 2/m)
26.3SchaireriteNa21(SO4)7ClF6Trig. 3m (3 2/m)
26.4GaleiteNa15(SO4)5F4ClTrig.
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 · 14H2O
26.11Svyazhinite(Mg,Mn2+,Ca)(Al,Fe3+)(SO4)2F · 14H2OTric.
26.12D'AnsiteNa21Mg(SO4)10Cl3Iso.
26.13AnhydrokainiteKMg(SO4)Cl
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
26.24SundiusitePb10(SO4)O8Cl2Mon.
26.25CaracoliteNa3Pb2(SO4)3ClMon.
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
26.29NabokoiteKCu7(SO4)5(Te4+O3)OClTet.

Other InformationHide

Notes:
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.
Australia
 
  • Queensland
    • Cloncurry Shire
      • Cloncurry
I.D. by Peter Elliott
Bolivia
 
  • 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
China
 
  • 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
France
 
  • 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
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
LAPIS 24 (7/8) 1999; Wendel, W. and Markl, G. (1999) Lavrion: Mineralogische Klassiker und Raritäten für Sammler. LAPIS 24 (7/8):34-52
No reference listed
              • Christiana Mine
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).
          • Megala Pefka area
            • Megala Pefka Mines
Branko Rieck collection
          • Sounion area
            • Sounion Mines
Lapis, 24, 7/8 (1999)
        • Lavrion District slag localities
          • Sounion area
Schnorrer-Köhler, G., Standfuss, K. & Standfuss, L. (1985): Neue Schlackenmineralien von Lavrion. Lapis, 10 (5), 13-16; 50.
Italy
 
  • 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).
Kazakhstan
 
  • 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
Mexico
 
  • 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):172.
Panczner(1987):172.
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
Tajikistan
 
  • Gorno-Badakhshan
Rocks & Minerals 81:5 422-426
USA
 
  • Arizona
    • Graham Co.
      • Aravaipa Mining District
        • Santa Teresa Mts
          • 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 Mts
          • 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 Mts
        • 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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