Jouravskite Mineral Data + Say JOURAVSKITE


[On-Line Catalogue] [On-Line Auctions] [eBay] [Contact Us] [Policies]
We specialize in fine European and Asian Mineral Specimens
Heliodor is based in Prague, Czech Republic

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 Synonym: Synonym: ICSD 26187
  PDF 18-668
 

Jouravskite Image

Click Here for Larger Jouravskite Image in a New Browser Window Images:
Click Here for Larger Jouravskite Image

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 - DipyramidalH-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 Diaphaniety: Diaphaniety: 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
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:

relectron=2.02 gm/cc
note: rJouravskite =1.95 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00118
Boson Index = 0.99882
Help on Photoelectric: Photoelectric:

PEJouravskite = 4.68 barns/electron
U=PEJouravskite x relectron= 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: 32.4.4.3 (32)Compound Sulfates
  (32.4)(hydrous) with poly-anionic formula
  (32.4.4)Dana Group
 
32.4.4.1 Charlesite Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12·26(H2O) P 31c 3m
 
32.4.4.2 Sturmanite Ca6(Fe,Al,Mn)2(SO4)2[B(OH)4](OH)12·25(H2O) P 31c 3m
 
32.4.4.3 Jouravskite Ca3Mn(SO4,CO3)2(OH)6·12(H2O) P 63/m 6/m
 
32.4.4.4 Thaumasite Ca3Si(CO3)(SO4)(OH)6·12(H2O) P 63/m 6/m
 
32.4.4.5 Carraraite! Ca3Ge(OH)6(SO4)(CO3)·12H2O P 63/m, or P 63 Hex
Help on  Strunz Class: Strunz Class: VI/D.13-30 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium and very big size
  VI/D.13 - Ettringite group, Ettringite - Sturmanite
 
VI/D.13-10 Ettringite Ca6Al2(SO4)3(OH)12·26(H2O) P 63/mmc 6/m 2/m 2/m
 
VI/D.13-20 Bentorite Ca6(Cr,Al)2(SO4)3(OH)12·26(H2O) P 63/mmc 6/m 2/m 2/m
 
VI/D.13-30 Jouravskite Ca3Mn(SO4,CO3)2(OH)6·12(H2O) P 63/m 6/m
 
VI/D.13-35 Carraraite! Ca3Ge(OH)6(SO4)(CO3)·12H2O P 63/m, or P 63 Hex
 
VI/D.13-40 Charlesite Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12·26(H2O) P 31c 3m
 
VI/D.13-50 Sturmanite Ca6(Fe,Al,Mn)2(SO4)2[B(OH)4](OH)12·25(H2O) P 31c 3m
 
VI/D.13-60 Buryatite! Ca3(Si,Fe,Al)[SO4][B(OH)4](OH,O)6·12(H2O) P 31c 3m
 

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

Search for Jouravskite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Jouravskite :

AA Mineral Specimens
B & L Fine Minerals

Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
Heliodor
John Betts Fine Minerals
Mason's Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz
T G Fine Minerals
Wrights Rock Shop

Translate Jouravskite Mineral Data :

Ask about Jouravskite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Jouravskite Specimen Label here :

Jouravskite

Ca3Mn++++(SO4,CO3)2(OH)6·12(H2O)
Dana No: 32.4.4.3 Strunz No: VI/D.13-30
Locality:

 

Notes:

 

 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links