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Rapidcreekite

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Formula:
Ca2(SO4)(CO3) · 4H2O
Colour:
White, colourless.
Lustre:
Vitreous
Hardness:
2
Crystal System:
Orthorhombic
Name:
Named after the Rapid Creek area, Yukon, the type locality.
This page provides mineralogical data about Rapidcreekite.


Hide all sections | Show all sections

Classification of RapidcreekiteHide

Approved
7.DG.20

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
G : With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
32.2.1.1

32 : COMPOUND SULFATES
2 : Hydrated Compound Sulfates
12.2.8

12 : Carbonates with other anions
2 : Carbonates with sulphate

Physical Properties of RapidcreekiteHide

Vitreous
Colour:
White, colourless.
Hardness:

Optical Data of RapidcreekiteHide

Type:
Biaxial (+)
RI values:
nα = 1.516 nβ = 1.518 nγ = 1.531
2V:
Measured: 45° , Calculated: 44°
Max Birefringence:
δ = 0.015
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 RapidcreekiteHide

Formula:
Ca2(SO4)(CO3) · 4H2O

Crystallography of RapidcreekiteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 15.49 Å, b = 19.18 Å, c = 6.15 Å
Ratio:
a:b:c = 0.808 : 1 : 0.321
Unit Cell V:
1,827.15 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.78 (100)
3.11 (80)
4.31 (70)
3.88 (70)
2.797 (60)
2.917 (50)
2.555 (50)

Type Occurrence of RapidcreekiteHide

Synonyms of RapidcreekiteHide

Other Language Names for RapidcreekiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Geminite2 photos of Rapidcreekite associated with Geminite on mindat.org.
Quartz1 photo of Rapidcreekite associated with Quartz on mindat.org.
Gypsum1 photo of Rapidcreekite associated with Gypsum on mindat.org.
Calcite1 photo of Rapidcreekite associated with Calcite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.DG.05DarapskiteNa3(SO4)(NO3) · H2OMon. 2/m
7.DG.10Clinoungemachite(Na, K, Fe, SO4)Mon. 2/m
7.DG.10HumberstoniteNa7K3Mg2(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
7.DG.10UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
7.DG.15BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DG.15CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c
7.DG.15EttringiteCa6Al2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
7.DG.15JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex.
7.DG.15SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
7.DG.15ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
7.DG.15CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2OHex.
7.DG.15BuryatiteCa3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
7.DG.20KorkinoiteCa4(SO4)2(CO3)2 · 9(H2O)Orth. mmm (2/m 2/m 2/m) : Pmmm
7.DG.25TatarskiteCa6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2OOrth.
7.DG.30NakauriiteCu8(SO4)4(CO3)(OH)6 · 48H2OOrth.
7.DG.35Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
7.DG.40CarlosruiziteK6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.40FuenzalidaiteK6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.45Chelyabinskite(Ca,Mg)3(SO4,CO3)2[Si(OH)6] · 9H2O (?)Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

12.2.1BurkeiteNa6(CO3)(SO4)2Orth.
12.2.2HanksiteNa22K(SO4)9(CO3)2ClHex. 6/m : P63/m
12.2.3TychiteNa6Mg2(CO3)4(SO4)Iso. m3 (2/m 3) : Fd3
12.2.4MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2OTrig. 3m (3 2/m) : R3m
12.2.5FerrotychiteNa6(Fe,Mn,Mg)2(CO3)4(SO4)
12.2.6NakauriiteCu8(SO4)4(CO3)(OH)6 · 48H2OOrth.
12.2.7CarbonatecyanotrichiteCu4Al2(CO3,SO4)(OH)12 · 2H2OOrth.
12.2.9TatarskiteCa6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2OOrth.
12.2.10Schulenbergite(Cu,Zn)7(SO4)2(OH)10 · 3H2OTrig.
12.2.11LeadhillitePb4(CO3)2(SO4)(OH)2Mon. 2/m : P21/b
12.2.12MacphersonitePb4(CO3)2(SO4)(OH)2Orth. mmm (2/m 2/m 2/m)
12.2.13SusannitePb4(CO3)2(SO4)(OH)2Trig. 3 : P3
12.2.14WherryitePb7Cu2(SO4)4(SiO4)2(OH)2Mon. 2/m : B2/m
12.2.15CaledonitePb5Cu2(SO4)3(CO3)(OH)6Orth. mm2 : Pmn21
12.2.16NasledovitePbMn3Al4(CO3)4(SO4)O5 · 5H2O
12.2.17JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex.
12.2.18SchröckingeriteNaCa3(UO2)(CO3)3(SO4)F · 10H2OTric. 1 : P1
12.2.19ManganotychiteNa6Mn2(CO3)4(SO4)
12.2.20HauckiteFe3+3(Mg,Mn2+)24Zn18(SO4)4(CO3)2(OH)81Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
12.2.21ParaotwayiteNi(OH)2-x(SO4,CO3)0.5xMon.
12.2.22Carrboydite[(Ni1-xAlx)(OH)2][SO4]x/2 · nH2OHex.
12.2.23Mountkeithite[(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2OHex.
12.2.24CamérolaiteCu6Al3(OH)18(H2O)2[Sb(OH)6](SO4)Tric. 1 : P1

Other InformationHide

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 RapidcreekiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
ROBERTS, A.C., ANSELL, H.G., JONASSON, I.R., GRICE, J.D. & RAMIK, R.A. (1986): Rapidcreekite, a new hydrated calcium sulfate-carbonate from the Rapid Creek area, Yukon Territory. Canadian Mineralogist 24, 51-54.
ROBINSON, G.W., VAN VELTHUIZEN, J., ANSELL, H.G. & STURMAN, B.D. (1992): Mineralogy of the Rapid Creek and Big Fish River area Yukon Territory. Mineralogical Record 23, 1-47.
COOPER, M.A. & HAWTHORNE, F.C. (1996): The crystal structure of rapidcreekite, Ca2(SO4)(CO3)$4H2O, and its relation to the structure of gypsum. Canadian Mineralogist 34, 99-106
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)

Internet Links for RapidcreekiteHide

Localities for RapidcreekiteHide

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.
Canada
 
  • Yukon
    • Dawson Mining District
MinRec 23:4-47
ROBERTS, A.C., ANSELL, H.G., JONASSON, I.R., GRICE, J.D. & RAMIK, R.A. (1986): Rapidcreekite, a new hydrated calcium sulfate-carbonate from the Rapid Creek area, Yukon Territory. Canadian Mineralogist 24, 51-54. ROBINSON, G.W., VAN VELTHUIZEN, J., ANSELL, H.G. & STURMAN, B.D. (1992): Mineralogy of the Rapid Creek and Big Fish River area Yukon Territory. Mineralogical Record 23, 1-47. COOPER, M.A. & HAWTHORNE, F.C. (1996): The crystal structure of rapidcreekite, Ca2(SO4)(CO3)$4H2O, and its relation to the structure of gypsum. Canadian Mineralogist 34, 99-106.
        • Kulan Camp (Area A; Area 1)
Robinson, G.W., Van Velthuizen, J., Ansell, H.G. & Sturman, B.D. (1992): Mineralogy of the Rapid Creek and Big Fish River area, Yukon Territory. Mineralogical Record 23, 1-47
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Beroun (Beraun)
Žák K., Skála R., Filippi M., Plášil J. (2010): Ikait - málo známý minerál zaledněných jeskyní: výskyt v občasném sezónním zalednění jeskyně Koda (Český kras). Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze 18, 109-115.
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Schenkenzell
        • Wittichen
          • Burgfelsen
American Mineralogist: 76: 2021.
  • Thuringia
    • Saalfeld
      • Garnsdorf
Rüger, F.; Senf, L. & Witzke, T. (1995): Die Saalfelder Feengrotten: Seltene Sekundärmineralien aus Thüringen.- Lapis 20, 1, 15-26
Norway
 
  • Buskerud
    • Kongsberg
      • Kongsberg Silver Mining District
        • Overberget Mining Field
Raade,G. (1989): "Etter Neumann". NAGS-nytt 16(2), 49
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Legnica
      • Lubin District
        • Lubin
Material analysed by University of Silesia
  • Upper Silesia (Śląskie)
Warchulski, R., Gawęda, A., Szopa, K. (2014): Secondary phases from the Zn-Pb smelting slags from Katowice – Piekary Śląskie area, Upper Silesia, Poland: a SEM – XRD overview. Mineralogia Special Papers: 42: 110-111
Romania
 
  • Caraş-Severin Co.
    • Cerna valley
Onac, B. P. (2009): ACTA CARSOLOGICA 38/1, 27-39; Onac, B.P. & Effenberger, H.S. (2010): Rapidcreekite, Ca2(SO4)(CO3)•4H2O, in the H2S-rich environment of Diana Cave (Romania). 20th General Meeting of the IMA (IMA2010), Budapest, Hungary, August 21-27, CD of Abstracts, p. 470.
Mineral and/or Locality  
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