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Jouravskite Mineral Data

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General Jouravskite Information

Help on Chemical  Formula: Chemical Formula: Ca3Mn++++(SO4,CO3)2(OH)6•12(H2O)
Help on Composition: Composition: Molecular Weight = 667.50 gm
   Calcium    18.01 %  Ca   25.20 % CaO
   Manganese   8.23 %  Mn   13.02 % MnO2
   Hydrogen    4.53 %  H    40.48 % H2O
   Carbon      0.90 %  C     3.30 % CO2
   Sulfur      7.21 %  S    17.99 % SO3
   Oxygen     61.12 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Mn4+(SO4)1.5(CO3)0.5(OH)6•12(H2O)
Help on Environment: Environment: Secondary mineral found on other manganese minerals.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Tachgagalt No. 2 vein, Anti Atlas, Morocco. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Georges Jouravsky (1896-1964), chief geologist, Division de la Geologie du Maroc.
Help on Name Pronunciation: Name Pronunciation: Jouravskite + Pronunciation Say JOURAVSKITE
Help on Synonym: Synonym: ICSD 26187
  PDF 18-668
 

Jouravskite Image

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  Jouravskite

Comments: Lemon yellow granular jouravskite.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 3.3 x 2.1 cm.
© John Veevaert

Jouravskite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.94936
Help on Cell Dimensions: Cell Dimensions: a = 11.06, c = 10.5, Z = 2; V = 1,112.32 Den(Calc)= 1.99
Help on Crystal System: Crystal System: Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.6(1), 3.81(0.6), 5.53(0.6),
 

Physical Properties of Jouravskite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Green orange, Greenish yellow.
Help on Density: Density: 1.95
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: greenish white
 

Optical Properties of Jouravskite

Help on Dichroism (e): Dichroism (e): green.
Help on Dichroism (w): Dichroism (w): russet.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.019 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2754,KPDmeas= 0.281,KC= 0.2807
Ncalc = 1.55 - 1.56
Help on Optical Data: Optical Data: Uniaxial (-), e=1.54, w=1.556, bire=0.0160.
 

Calculated Properties of Jouravskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.02 gm/cc
note: Specific Gravity of Jouravskite =1.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0011827535
Boson Index = 0.9988172465
Help on Photoelectric: Photoelectric: PEJouravskite = 4.68 barns/electron
U=PEJouravskite x rElectron Density= 9.46 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jouravskite is Not Radioactive
 

Jouravskite Classification

Help on  Dana Class: Dana Class: 32.04.04.03 (32)Compound Sulfates
  (32.04)(hydrous) with poly-anionic formula
  (32.04.04)Charlesite Group
 
32.04.04.01 Charlesite Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O) P 31c 3m
 
32.04.04.02 Sturmanite Ca6(Fe,Al,Mn)2(SO4)2[B(OH)4](OH)12•25(H2O) P 31c 3m
 
32.04.04.03 Jouravskite Ca3Mn(SO4,CO3)2(OH)6•12(H2O) P 63/m 6/m
 
32.04.04.04 Thaumasite Ca3Si(CO3)(SO4)(OH)6•12(H2O) P 63/m 6/m
 
32.04.04.05 Carraraite! Ca3Ge(OH)6(SO4)(CO3)•12H2O P 63/m, or P 63 Hex
Help on  Strunz Class: Strunz Class: 07.DG.15 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.15 Bentorite Ca6(Cr,Al)2(SO4)3(OH)12•26(H2O) P 63/mmc 6/m 2/m 2/m
 
07.DG.15 Charlesite Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O) P 31c 3m
 
07.DG.15 Ettringite Ca6Al2(SO4)3(OH)12•26(H2O) P 63/mmc 6/m 2/m 2/m
 
07.DG.15 Jouravskite Ca3Mn(SO4,CO3)2(OH)6•12(H2O) P 63/m 6/m
 
07.DG.15 Sturmanite Ca6(Fe,Al,Mn)2(SO4)2[B(OH)4](OH)12•25(H2O) P 31c 3m
 
07.DG.15 Thaumasite Ca3Si(CO3)(SO4)(OH)6•12(H2O) P 63/m 6/m
 
07.DG.15 Buryatite! Ca3(Si,Fe,Al)[SO4][B(OH)4](OH,O)6•12(H2O) P 31c 3m
 
07.DG.15 Carraraite! Ca3Ge(OH)6(SO4)(CO3)•12H2O P 63/m, or P 63 Hex
 

Other Jouravskite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Jouravskite :
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
15 - WWW-MINCRYST

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Jouravskite

Ca3Mn++++(SO4,CO3)2(OH)6•12(H2O)
Dana No: 32.04.04.03 Strunz No: 07.DG.15
Locality:

 

Notes:

 

 
   
 


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