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Creedite

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Formula:
Ca
 
3
SO
 
4
Al
 
2
F
 
8
(OH)
 
2
· 2H
 
2
O
System:MonoclinicColour:white, violet, ...
Lustre:VitreousHardness:4
Name:After the type locality, in the Creede quadrangle, Colorado.


A complex aluminium salt.

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Classification of Creedite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:3/C.01-40
Nickel-Strunz 10th (pending) edition ID:3.CG.15

3 : HALIDES
C : Complex halides
G : Aluminofluorides with CO3, SO4, PO4
Dana 8th edition ID:12.1.4.1

12 : COMPOUND HALIDES
1 : Miscellaneous
Hey's CIM Ref.:26.18

26 : Sulphates with Halide
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Type Occurrence of Creedite

Type Locality:Colorado Fluorspar Co. Mine, Wagon Wheel Gap, Mineral Co., Colorado, USA
Year of Discovery:1916
Geological Setting of type material:Upper portions of a fluorite-baryte vein.
Associated Minerals at type locality:
KaoliniteBaryte

Physical Properties of Creedite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:white, violet, colourless; colourless in transmitted light.
Streak:white
Hardness (Mohs):4
Tenacity:Brittle
Cleavage:Perfect
On {100}.
Fracture:Conchoidal
Density (measured):2.713 - 2.73 g/cm3
Density (calculated):2.715 g/cm3

Crystallography of Creedite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b
Space Group 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 Volume: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 Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.
X-Ray Powder Diffraction:
d-spacingIntensity
7.3 (9)
6.9 (9)
5.79 (8)
3.92 (9)
3.48 (10)
3.07 (8)
2.161 (9)

Optical Data of Creedite

Type:Biaxial (-)
RI values: nα = 1.461 nβ = 1.478 nγ = 1.485
Maximum Birefringence:δ = 0.024

Chart 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 Creedite

Formula:
Ca
 
3
SO
 
4
Al
 
2
F
 
8
(OH)
 
2
· 2H
 
2
O
Simplified for copy/paste:Ca3SO4Al2F8(OH)2·2H2O
Essential elements:Al, Ca, F, H, O, S
All elements listed in formula:Al, Ca, F, H, O, S

Relationship of Creedite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.CG.05Stenonite
(Sr,Ba,Na)
 
2
Al(CO
 
3
)F
 
5
3.CG.10Chukhrovite-(Ce)
Ca
 
3
(Ce,Y)[F|SO
 
4
|(AlF
 
6
)
 
2
] · 10H
 
2
O
3.CG.10Chukhrovite-(Y)
Ca
 
3
(Y,Ce)[F|SO
 
4
|(AlF
 
6
)
 
2
] · 10H
 
2
O
3.CG.10Meniaylovite
Ca
 
4
[F|SO
 
4
|SiF
 
6
|AlF
 
6
] · 12H
 
2
O
3.CG.10Chukhrovite-(Nd)
Ca
 
3
(Nd,Y)Al
 
2
(SO
 
4
)F
 
13
·12H
 
2
O
3.CG.20Bøggildite
Na
 
2
Sr
 
2
Al
 
2
PO
 
4
F
 
9
3.CG.25Thermessaite
K
 
2
(AlF
 
3
)(SO
 
4
)
Related Minerals - Hey's Index Grouping:

- +
26.1Kogarkoite
Na
 
3
(SO
 
4
)F
26.2Sulphohalite
Na
 
6
(SO
 
4
)
 
2
FCl
26.3Schairerite
Na
 
3
(SO
 
4
)(F,Cl)
26.4Galeite
Na
 
15
(SO
 
4
)
 
5
F
 
4
Cl
26.5Connellite
Cu
 
19
(SO
 
4
)(OH)
 
32
Cl
 
4
· 3H
 
2
O
26.6Chlorothionite
K
 
2
Cu(SO
 
4
)Cl
 
2
26.7Kamchatkite
KCu
 
3
(SO
 
4
)
 
2
OCl
26.8Spangolite
Cu
 
6
Al(SO
 
4
)(OH)
 
12
Cl · 3H
 
2
O
26.9Aubertite
CuAl(SO
 
4
)
 
2
Cl · 14H
 
2
O
26.10Magnesioaubertite
(Mg,Cu)Al(SO
 
4
)
 
2
Cl · 14H
 
2
O
26.11Svyazhinite
(Mg,Mn
2+
 
,Ca)(Al,Fe
3+
 
)(SO
 
4
)
 
2
F · 14H
 
2
O
26.12D'Ansite
Na
 
21
Mg(SO
 
4
)
 
10
Cl
 
3
26.13Anhydrokainite
KMg(SO
 
4
)Cl
26.14Kainite
KMg(SO
 
4
)Cl · 3H
 
2
O
26.15Mosesite
(Hg
 
2
N)(Cl,SO
 
4
,MoO
 
4
) · H
 
2
O
26.16Kleinite
(Hg
 
2
N)(Cl,SO
 
4
) · nH
 
2
O
26.17Wilcoxite
MgAl(SO
 
4
)
 
2
F · 17H
 
2
O
26.19Lannonite
Mg
 
2
Ca
 
4
Al
 
4
(SO
 
4
)
 
8
F
 
8
· 24H
 
2
O
26.20Chukhrovite-(Y)
Ca
 
3
(Y,Ce)[F|SO
 
4
|(AlF
 
6
)
 
2
] · 10H
 
2
O
26.21Chukhrovite-(Ce)
Ca
 
3
(Ce,Y)[F|SO
 
4
|(AlF
 
6
)
 
2
] · 10H
 
2
O
26.22Grandreefite
Pb
 
2
(SO
 
4
)F
 
2
26.23Pseudograndreefite
Pb
 
6
(SO
 
4
)F
 
10
26.24Sundiusite
Pb
 
10
(SO
 
4
)O
 
8
Cl
 
2
26.25Caracolite
Na
 
3
Pb
 
2
(SO
 
4
)
 
3
Cl
26.26Mammothite
Pb
 
6
Cu
 
4
AlSb
5+
 
O
 
2
(OH)
 
16
Cl
 
4
(SO
 
4
)
 
2
26.27Atlasovite
K(BiO)Cu
 
6
Fe
3+
 
(SO
 
4
)
 
5
O
 
3
Cl
26.28Xitieshanite
Fe
3+
 
(SO
 
4
)Cl · 6H
 
2
O
26.29Nabokoite
KCu
 
7
(SO
 
4
)
 
5
(Te
4+
 
O
 
3
)OCl

Other Names for Creedite

Synonyms:
Belyankite
Other Languages:
Dutch:Creediet
German:Belijankit
Belyankit
Creedit
Italian:Creedite
Russian:Кридит
Simplified Chinese:铝氟石膏
Spanish:Belyankita
Creedita
Traditional Chinese:氟鋁石膏

Other Information

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

References for Creedite

Reference List:

- +
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

Internet Links for Creedite

Search Engines:
  • Look for Creedite on Google
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  • External Links:
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  • Look for Creedite on Athena Mineralogy
  • Look for Creedite on Wikipedia
  • Look for Creedite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Creedite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Buy rare minerals from Excalibur Minerals
  • Specimens:The following Creedite specimens are currently listed for sale on minfind.com.

    Localities for Creedite

    The 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. ? 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.
    Australia
     
    • Queensland
      • Mount Isa - Cloncurry area
        • Cloncurry District
    I.D. by Peter Elliott
    Bolivia
     
    • La Paz Department
      • 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 Department
      • Rafael Bustillo Province (Bustillos Province)
        • Llallagua
    Mineralogical Record: 32: 474.; Hyrsl, J. & A. Petrov (2006): Famous Mineral Localities: Llallagua, Bolivia. Mineralogical Record. 37: 117-162
    China
     
    • Guizhou Province
      • Qianxi'nan Autonomous Prefecture
        • Qinglong Co.
          • Dachang Sb ore field
    www.johnbetts-fineminerals.com + Ottens, B. (2006): Antimonit aus China. LAPIS 31 (2), 23-34
    • Hunan Province
      • Loudi Prefecture
        • Lengshuijiang Co.
    Mingyue He, Ya'er Lou, and Pu Wang (2002): Mineral Deposits 21(suppl.), 384-387
    France
     
    • Alsace
      • Haut-Rhin
        • Ribeauvillé
          • Bergheim
    J.-L. Hohl: "Minéraux et Mines du Massif Vosgien", Editions du Rhin (Mulhouse), 1994
          • Orschwiller
    J.-L. Hohl: "Minéraux et Mines du Massif Vosgien", Editions du Rhin (Mulhouse), 1994
    Greece
     
    • Attikí Prefecture (Attica; Attika)
      • Lavrion District (Laurion; Laurium)
        • 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
          • 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
        • Campiglia Marittima
    Jansen, H. & van den Berg, W. (1998): Slakkenmineralen in Toscane (Italië). Gea, no. 4, 109-117 (in Dutch).
    Kazakhstan
     
    • Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast')
      • Öskemen (Ust'-Kamenogorsk)
      • 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.
    • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
      • 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
      • 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
      • 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
            • Aquiles Serdán
    Panczner (1987): 150, 210, 220.
            • Francisco Portillo
    Panczner(1987):172.
    Panczner(1987):172.
    Panczner (1987):94-366.
    • Durango
      • Mun. de Rodeo
        • Rodeo
          • Abasolo
    Rocks & Minerals 83:5 pp 422-426; Rob Lavinsky
    South Africa
     
    • Northern Cape Province
      • 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
     
    • Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni)
      • Pamir Mts
    Rocks & Minerals 81:5 422-426
    USA
     
    • Arizona
      • Graham Co.
        • Aravaipa 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 District (Ballarat 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.
    • Colorado
      • Clear Creek Co.
        • Dailey District (Jones Pass 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 District
          • Cripple Creek
    Min Rec 36:2 pp143-185; 2009 New Mexico Mineral Symposium abstracts
    • Nevada
      • Churchill Co.
        • Lake District
    NBMG Spec. Pub. 31 Minerals of Nevada
        • Mountain Wells District
    NBMG Spec. Pub. 31 Minerals of Nevada
      • Douglas Co.
        • Wellington Hills
          • Silver Glance District (Wellington District)
    NBMG Spec. Pub. 31 Minerals of Nevada
      • Esmeralda Co.
    Rocks & Minerals, Nov. 1999
        • Rock Hill District
    NBMG Spec. Pub. 31 Minerals of Nevada
    NBMG Spec. Pub. 31 Minerals of Nevada
      • Humboldt Co.
        • Iron Point 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
      • Nye Co.
        • Lodi Hills
          • Lodi 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 District
    NBMG Spec. Pub. 31 Minerals of Nevada
        • Tonopah 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.
    [MinRecord 30:337]
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