Wenkite Mineral Data

Wenkite Mineral Data
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General Wenkite Information

Help on Chemical Formula: Chemical Formula: Ba4Ca6(Si,Al)20O39(OH)2(SO4)3•n(H2O) (?)
Help on Composition: Composition: Molecular Weight = 2,317.71 gm
   Barium    21.92 %  Ba   24.48 % BaO
   Sodium     0.50 %  Na    0.67 % Na2O
   Calcium    9.51 %  Ca   13.31 % CaO
   Aluminum  11.99 %  Al   22.66 % Al2O3
   Silicon   11.63 %  Si   24.89 % SiO2
   Hydrogen   0.33 %  H     2.95 % H2O
   Sulfur     4.01 %  S    10.02 % SO3
   Chlorine   0.76 %  Cl    0.76 % Cl
               -   %   Cl   -0.17 % -O=Cl2   
   Oxygen    38.52 %  O
   Fluorine   0.82 %  F     0.82 % F
               -   %   F    -0.35 % -O=F2    
            ______        ______ 
            100.00 %      100.03 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba3.7Ca5.5Na0.5Si9.6Al10.3O38.9(OH)3FCl0.5(SO4)2.9·2.3(H2O)
Help on Environment: Environment: Formed between barite layers and calc-silicate rock, a product of strong metamorphism of limestones.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: At Cava Mergozzoni, Candoglia, Piedmont, Ital. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Eduard Wenk (1907-), mineralogist and petrologist, University of Basel, Basel, Switzerland.
Help on Name Pronunciation: Name Pronunciation: Wenkite Say WENKITE
Help on Synonym: Synonym: ICSD 9338
  PDF 19-1418
 

Wenkite Image

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Wenkite

Comments: Translucent nearly colorless wenkite crystal in vug.
Location: Garpenberg Mine, Kopparberg, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wenkite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.55229
Help on Cell Dimensions: Cell Dimensions: a = 13.511, c = 7.462, Z = 1; V = 1,179.67 Den(Calc)= 3.26
Help on Crystal System: Crystal System: Hexagonal - Ditrigonal DipyramidalH-M Symbol (6 m2) Space Group: P 62m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.46(1), 2.69(0.9), 3.38(0.8),
Click Here for Large Wenkite Structure Window Crystal Structure:

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Merlino S , Acta Crystallographica, Section B , 30 (1974) p.1262-1266, The crystal structure of wenkite, Locality: Candoglia, Italy

View Additional jPOWD Structure files for Wenkite
[1]
 

Physical Properties of Wenkite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Light gray.
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Columnar - Forms columns
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Wenkite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1817,KPDmeas= 0.1893,KC= 0.1898
Ncalc = 1.59 - 1.62
Help on Optical Data: Optical Data: Uniaxial (-), e=1.589, w=1.596, bire=0.0070.
 

Calculated Properties of Wenkite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.00 gm/cc
note: Specific Gravity of Wenkite =3.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEWenkite = 94.20 barns/electron
U=PEWenkite x rElectron Density= 282.12 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wenkite is Not Radioactive
 

Wenkite Classification
Help on Dana Class: Dana Class: 76.02.05.16 (76)Tectosilicate Al-Si Framework
  (76.02)Feldspathoids and related species
  (76.02.05)Cancrinite group
 
76.02.05.01 Afghanite (Na,Ca,K)8(Si,Al)12O24(SO4,Cl,CO3)3•(H2O) P 63/mmc, P 63mc, or P 62c Hex
 
76.02.05.02 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5•(H2O) P 31c 3m
 
76.02.05.03 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 63 6
 
76.02.05.04 Cancrisilite Na7Al5Si7O24(C03)•3(H2O) P 63 6
 
76.02.05.05 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 63/m 6/m
 
76.02.05.06 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10•2(H2O) P 321 3 2
 
76.02.05.07 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2•5H2O P 31c 3m
 
76.02.05.08 Hydroxycancrinite Na4(AlSiO4)3(OH)•(H2O) P 63 6
 
76.02.05.09 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4•(H2O) P 6m2 6 m2
 
76.02.05.10 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6322 6 2 2
 
76.02.05.11 Pitiglianoite Na6K2Si6Al6O24(SO4)•2(H2O) P 63 6
 
76.02.05.12 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 63/m 6/m
 
76.02.05.13 Sacrofanite (Na,Ca,K)9Si6Al6O24[(OH),(SO4),(CO3),Cl)]4•n(H2O) P 63/mmc ? 6/m 2/m 2/m
 
76.02.05.14 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl•(H2O) P 6222 6 2 2
 
76.02.05.15 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4•n(H2O) P 6322 6 2 2
 
76.02.05.16 Wenkite Ba4Ca6(Si,Al)20O39(OH)2(SO4)3•n(H2O)(?) P 62m 6 m2
 
76.02.05.17 Marinellite! [(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2•6(H2O) P 31c or P 2c Trig
 
76.02.05.18 Farneseite! (Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12•6(H2O) P 63/m 6/m 2/m 2/m
 
76.02.05.19 Alloriite! Na5K1.5Ca(Si6Al6O24)(SO4)(OH)0.5•H2O P 31c 3m
 
76.02.05.20 Biachellaite (Na,Ca,K)8(Si6Al6O24)(SO4)2(OH)0.5•H2O P 3 3
 
76.02.05.21 IMA2008-006! [Na82.5Ca33K16.5](Si99Al99O396)(SO4)33•4H2O P 3 3
 
76.02.05.22 Kyanoxalite! Na7(Al5-6Si6-7O24)(C2O4)0.5-1.0•5H2O P 63 6
 
76.02.05.23 IMA2008-065! (Na,K)6Ca2(Si6Al6O24)Cl2(CO3) P 63 6
Help on Strunz Class: Strunz Class: 09.GD.25 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GD -Chains of 6-membered rings – tabular zeolites
 
09.GD.25 Offretite (K2,Ca,Mg)2.5Al5Si13O36•15(H2O) P 6m2 6 m2
 
09.GD.25 Wenkite Ba4Ca6(Si,Al)20O39(OH)2(SO4)3•n(H2O)(?) P 62m 6 m2
 

Other Wenkite Information
Help on References: References: NAME( AntBidBlaNic2) 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 Wenkite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Scandinavian mineral gallery
16 - WWW-MINCRYST
17 - Zeolite Database by Bruno Herreros

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Wenkite

Ba4Ca6(Si,Al)20O39(OH)2(SO4)3•n(H2O) (?)
Dana No: 76.02.05.16 Strunz No: 09.GD.25
Locality:

 

Notes: