Wenkite Mineral Data + Say WENKITE

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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 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 Diaphaniety: Diaphaniety: 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
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:

relectron=3.00 gm/cc
note: rWenkite =3.13 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.04511
Boson Index = 0.95489
Help on Photoelectric: Photoelectric:

PEWenkite = 94.20 barns/electron
U=PEWenkite x relectron= 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: 76.2.5.16 (76)Tectosilicate Al-Si Framework
  (76.2)Feldspathoids and related species
  (76.2.5)Cancrinite group
 
76.2.5.1 Afghanite (Na,Ca,K)8(Si,Al)12O24(SO4,Cl,CO3)3·(H2O) P 63/mmc, P 63mc, or P 62c Hex
 
76.2.5.2 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5·(H2O) P 31c 3m
 
76.2.5.3 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 63 6
 
76.2.5.4 Cancrisilite Na7Al5Si7O24(C03)·3(H2O) P 63 6
 
76.2.5.5 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 63/m 6/m
 
76.2.5.6 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10·2(H2O) P 321 3 2
 
76.2.5.7 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2·5H2O P 31c 3m
 
76.2.5.8 Hydroxycancrinite Na4(AlSiO4)3(OH)·(H2O) P 63 6
 
76.2.5.9 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4·(H2O) P 6m2 6 m2
 
76.2.5.10 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6322 6 2 2
 
76.2.5.11 Pitiglianoite Na6K2Si6Al6O24(SO4)·2(H2O) P 63 6
 
76.2.5.12 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 63/m 6/m
 
76.2.5.13 Sacrofanite (Na,Ca,K)9Si6Al6O24[(OH),(SO4),(CO3),Cl)]4·n(H2O) P 63/mmc ? 6/m 2/m 2/m
 
76.2.5.14 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl·(H2O) P 6222 6 2 2
 
76.2.5.15 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4·n(H2O) P 6322 6 2 2
 
76.2.5.16 Wenkite Ba4Ca6(Si,Al)20O39(OH)2(SO4)3·n(H2O)(?) P 62m 6 m2
 
76.2.5.17 Marinellite! [(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2·6(H2O) P 31c or P 2c Trig
 
76.2.5.18 IMA2004-043! (Na37K9Ca10)S56(Si42Al42)S84O168(SO4)12·6(H2O) P 63/m 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/J.09-100 VIII - Silicates
  VIII/J - Tectosilicates (network) with anions unfamiliar to the tetraheders
  VIII/J.09 - Cancrinite group
 
VIII/J.09-05 Hydroxycancrinite Na4(AlSiO4)3(OH)·(H2O) P 63 6
 
VIII/J.09-10 Cancrinite Na6Ca2Al6Si6O24(CO3)2 P 63 6
 
VIII/J.09-15 Cancrisilite Na7Al5Si7O24(C03)·3(H2O) P 63 6
 
VIII/J.09-20 Davyne Na4K2Ca2Si6Al6O24(SO4)Cl2 P 63/m 6/m
 
VIII/J.09-25 Quadridavyne (Na,K)6Ca2Al6Si6O24Cl4 P 63/m 6/m
 
VIII/J.09-30 Microsommite (Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 P 6322 6 2 2
 
VIII/J.09-40 Giuseppettite [Na42K16Ca6]S64Si48Al48O192(SO4)10Cl2·5H2O P 31c 3m
 
VIII/J.09-45 Bystrite (Na,K)7Ca(Si6Al6)O24S4.5·(H2O) P 31c 3m
 
VIII/J.09-50 Afghanite (Na,Ca,K)8(Si,Al)12O24(SO4,Cl,CO3)3·(H2O) P 63/mmc, P 63mc, or P 62c Hex
 
VIII/J.09-55 Tounkite (Na,Ca,K)8Al6Si6O24(SO4)2Cl·(H2O) P 6222 6 2 2
 
VIII/J.09-60 Sacrofanite (Na,Ca,K)9Si6Al6O24[(OH),(SO4),(CO3),Cl)]4·n(H2O) P 63/mmc ? 6/m 2/m 2/m
 
VIII/J.09-65 Pitiglianoite Na6K2Si6Al6O24(SO4)·2(H2O) P 63 6
 
VIII/J.09-70 Vishnevite (Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4·n(H2O) P 6322 6 2 2
 
VIII/J.09-80 Franzinite [(Na,K)30Ca10][Si30Al30O120](SO4)10·2(H2O) P 321 3 2
 
VIII/J.09-90 Liottite (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4·(H2O) P 6m2 6 m2
 
VIII/J.09-100 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - Scandinavian mineral gallery 14 - WWW-MINCRYST 15 -Zeolite Database by Bruno Herreros 16 -École des Mines de Paris

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Wenkite

Ba4Ca6(Si,Al)20O39(OH)2(SO4)3·n(H2O) (?)
Dana No: 76.2.5.16 Strunz No: VIII/J.09-100
Locality:

 

Notes:

 

 
   
 
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