Mineralogy Database

Rapidcreekite Mineral Data

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General Rapidcreekite Information

Help on Chemical  Formula: Chemical Formula: Ca2(SO4)(CO3)•4(H2O)
Help on Composition: Composition: Molecular Weight = 308.29 gm
   Calcium   26.00 %  Ca   36.38 % CaO
   Hydrogen   2.62 %  H    23.37 % H2O
   Carbon     3.90 %  C    14.28 % CO2
   Sulfur    10.40 %  S    25.97 % SO3
   Oxygen    57.09 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2(SO4)(CO3)•4(H2O)
Help on Environment: Environment: Found in joint surfaces along a siderite iron formation.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Rapid Creek, Big Fish river area, Yukon Territories, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Rapidcreekite + Pronunciation Say RAPIDCREEKITE
Help on Synonym: Synonym: ICSD 82493
  PDF 39-351

Rapidcreekite Image

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Comments: Colorless, radial-acicular crystals of rapidcreekite on matrix.
Location: Jeremias Gl├╝ck Mine (Fairy Grotto), Garnsdorf, Saalfeld, Thuringia, Germany. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Rapidcreekite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8076:1:0.321
Help on Cell Dimensions: Cell Dimensions: a = 15.49, b = 19.18, c = 6.157, Z = 8; V = 1,829.23 Den(Calc)= 2.24
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcnb
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.78(1), 3.11(0.8), 4.31(0.7),

Physical Properties of Rapidcreekite

Help on Cleavage: Cleavage: {010} Perfect, {100} Good
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.21
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Rapidcreekite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2329,KPDmeas= 0.236,KC= 0.232
Ncalc = 1.51 - 1.52
Help on Optical Data: Optical Data: Biaxial (+), a=1.516, b=1.518, g=1.531, bire=0.0150, 2V(Calc)=44, 2V(Meas)=45.

Calculated Properties of Rapidcreekite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.30 gm/cc
note: Specific Gravity of Rapidcreekite =2.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0018375981
Boson Index = 0.9981624019
Help on Photoelectric: Photoelectric: PERapidcreekite = 3.86 barns/electron
U=PERapidcreekite x rElectron Density= 8.86 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rapidcreekite is Not Radioactive

Rapidcreekite Classification

Help on  Dana Class: Dana Class: (32)Compound Sulfates
  (32.02)(hydrous) with simple bi-anionic formula
  (32.02.01)Dana Group Rapidcreekite Ca2(SO4)(CO3)•4(H2O) Pcnb 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 07.DG.20 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DG -With large and medium sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
07.DG.20 Rapidcreekite Ca2(SO4)(CO3)•4(H2O) Pcnb 2/m 2/m 2/m

Other Rapidcreekite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Rapidcreekite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 07.DG.20





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