Rapidcreekite
A valid IMA mineral species
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About Rapidcreekite
Formula:
Ca2(SO4)(CO3) · 4H2O
Colour:
White, colourless.
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.21
Crystal System:
Orthorhombic
Name:
Named after the Rapid Creek area, Yukon, the type locality.
Type Locality:
Unique Identifiers
Mindat ID:
3366
Long-form identifier:
mindat:1:1:3366:0
GUID
(UUID V4):
(UUID V4):
1fcd91c9-7f48-430a-adb0-db0dcbe1839e
IMA Classification of Rapidcreekite
Approved
Classification of Rapidcreekite
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
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
32 : COMPOUND SULFATES
2 : Hydrated Compound Sulfates
12.2.8
12 : Carbonates with other anions
2 : Carbonates with sulphate
12 : Carbonates with other anions
2 : Carbonates with sulphate
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Rck | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Rapidcreekite
Vitreous
Transparency:
Transparent
Colour:
White, colourless.
Streak:
white
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {010}; good on {100}.
Perfect on {010}; good on {100}.
Fracture:
Splintery
Density:
2.21(1) g/cm3 (Measured) 2.239 g/cm3 (Calculated)
Optical Data of Rapidcreekite
Type:
Biaxial (+)
RI values:
nα = 1.516(1) nβ = 1.518(1) nγ = 1.531(1)
2V:
Measured: 45° (3), Calculated: 43°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none
Chemistry of Rapidcreekite
Mindat Formula:
Ca2(SO4)(CO3) · 4H2O
Crystallography of Rapidcreekite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbcn
Setting:
Pbcn
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)
Z:
8
Comment:
Pcnb
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0019905 | Rapidcreekite | Onac B P, Effenberger H S, Wynn J G, Povara I (2013) Rapidcreekite in the sulfuric acid weathering environment of Diana Cave, Romania American Mineralogist 98 1302-1309 | 2013 | Diana Cave, Romania | 0 | 293 | |
| 0005481 | Rapidcreekite | Cooper M A, Hawthorne F C (1996) The crystal structure of rapidcreekite, Ca2(SO4)(CO3)(H2O)4, and its relation to the structure of gypsum The Canadian Mineralogist 34 99-106 |  | 1996 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.78 Å | (100) |
| 3.11 Å | (80) |
| 4.31 Å | (70) |
| 3.88 Å | (70) |
| 2.797 Å | (60) |
| 2.917 Å | (50) |
| 2.555 Å | (50) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 56 : Slag and smelter minerals (see also #51 and #55) |
Type Occurrence of Rapidcreekite
General Appearance of Type Material:
in radiating sprays, isolated and in crusts.
Place of Conservation of Type Material:
Geological Survey of Canada, Ottawa, 64346; Canadian Museum of Nature, Ottawa, Canada, 49502, 50824.
Associated Minerals at Type Locality:
Reference:
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.
Synonyms of Rapidcreekite
Other Language Names for Rapidcreekite
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Rapidcreekite associated with Gypsum | CaSO4 · 2H2O |
| 2 photos of Rapidcreekite associated with Calcite | CaCO3 |
| 2 photos of Rapidcreekite associated with Geminite | Cu2+(AsO3OH) · H2O |
| 1 photo of Rapidcreekite associated with Quartz | SiO2 |
| 1 photo of Rapidcreekite associated with Aragonite | CaCO3 |
| 1 photo of Rapidcreekite associated with Monohydrocalcite | CaCO3 · H2O |
| 1 photo of Rapidcreekite associated with Dolomite | CaMg(CO3)2 |
| 1 photo of Rapidcreekite associated with Šlikite | Zn2Mg(CO3)2(OH)2 · 4H2O |
Related Minerals - Strunz-mindat Grouping
| 7.DG. | Mathesiusite | K5(UO2)4(SO4)4(VO5) · 4H2O |
| 7.DG.05 | Darapskite | Na3(SO4)(NO3) · H2O |
| 7.DG.10 | Clinoungemachite | (Na, K, Fe, SO4) |
| 7.DG.10 | Humberstonite | Na7K3Mg2(SO4)6(NO3)2 · 6H2O |
| 7.DG.10 | Ungemachite | K3Na8Fe(SO4)6(NO3)2 · 6H2O |
| 7.DG.15 | Bentorite | Ca6Cr2(SO4)3(OH)12 · 26H2O |
| 7.DG.15 | Charlesite | Ca6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2O |
| 7.DG.15 | Ettringite | Ca6Al2(SO4)3(OH)12 · 26H2O |
| 7.DG.15 | Jouravskite | Ca3Mn4+(SO4)(CO3)(OH)6 · 12H2O |
| 7.DG.15 | Sturmanite | Ca6Fe3+2(SO4)2.5[B(OH)4](OH)12 · 25H2O |
| 7.DG.15 | Thaumasite | Ca3(SO4)[Si(OH)6](CO3) · 12H2O |
| 7.DG.15 | Carraraite | Ca3(SO4)[Ge(OH)6](CO3) · 12H2O |
| 7.DG.15 | Buryatite | Ca3(Si,Fe3+,Al)(SO4)B(OH)4(OH,O)6 · 12H2O |
| 7.DG.15 | Birunite | Ca18(SiO3)8.5(CO3)8.5SO4 · 15H2O(?) |
| 7.DG.15 | Hielscherite | Ca3Si(SO4)(SO3)(OH)6 · 11H2O |
| 7.DG.15 | Kottenheimite | Ca 3Si(SO4)2(OH)6 · 12H2O |
| 7.DG.15 | Imayoshiite | Ca3Al(CO3)[B(OH)4](OH)6 · 12H2O |
| 7.DG.15 | Tatarinovite | Ca3Al(SO4)[B(OH)4](OH)6 · 12H2O |
| 7.DG.15 | Siwaqaite | Ca6Al2(CrO4)3(OH)12 · 26H2O |
| 7.DG.15 | Chiyokoite | Ca3Si(CO3)[B(OH)4]O (OH)5 · 12H2O |
| 7.DG.25 | Tatarskite | Ca6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2O |
| 7.DG.30 | Nakauriite | Cu8(SO4)4(CO3)(OH)6 · 48H2O |
| 7.DG.35 | Chessexite | (Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2O |
| 7.DG.40 | Carlosruizite | K6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2O |
| 7.DG.40 | Fuenzalidaite | K6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2O |
| 7.DG.45 | Chelyabinskite | (Ca,Mg)3(SO4,CO3)2[Si(OH)6] · 9H2O (?) |
| 7.DG.55 | Ramazzoite | [Mg8Cu12(PO4)(CO3)4(OH)24(H2O)20][(H0.33SO4)3(H2O)36] |
| 7.DG.60 | Witzkeite | Na4K4Ca(NO3)2(SO4)4 · 2H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Rapidcreekite
mindat.org URL:
https://www.mindat.org/min-3366.html
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References for Rapidcreekite
Reference List:
Roberts, Andrew C., Ansell, H. Gary, Jonasson, Ian R., Grice, Joel D., Ramik, Robert A. (1986) Rapidcreekite, a new hydrated calcium sulfate-carbonate from the Rapid Creek area, Yukon Territory. The Canadian Mineralogist, 24 (1) 51-54
Cooper, Mark A., Hawthorne, Frank C. (1996) The crystal structure of rapidcreekite, Ca2(SO4)(CO3)(H2O)4, and its relation to the structure of gypsum. The Canadian Mineralogist, 34 (1) 99-106
Localities for Rapidcreekite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Shang (2000) |
| Robinson et al. (1992) |
| 150-152. +4 other references |
| Robinson et al. (1992) |
Czech Republic | |
| Žák K. et al. (2010) |
Egypt | |
| Salama et al. (2012) |
Germany | |
| American Mineralogist: 76: 2021. |
| Möhn et al. (08/2020) |
| Rüger +1 other reference |
Greece | |
| Rieck et al. (2018) |
Norway | |
| Raade (1989) +1 other reference |
Poland | |
| Material analysed by University of ... |
| Warchulski et al. (2014) +1 other reference |
| Warchulski et al. (2015) |
| Nowinska (2020) |
Romania | |
| H2S-rich environment of Diana Cave (Romania) +2 other references |
Russia | |
| Avdontceva et al. (2021) |
| Pekov (1998) |
Quick NavTopAbout RapidcreekiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Rapid Creek, Dawson mining district, Yukon, Canada