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Wenkite

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About WenkiteHide

Eduard J. L. Wenk
Formula:
(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
Colour:
Light grey
Lustre:
Vitreous, Pearly
Hardness:
6
Specific Gravity:
3.19 - 3.24
Crystal System:
Hexagonal
Member of:
Name:
Named in honor of Eduard Jean Louis Wenk (4 November 1907, Basel, Switzerland - 19 October 2001, Basel, Switzerland), geologist, petrologist, mineralogist, and professor at the University of Basel. He created the basis for maps of mineral isogrades in the Alps. From this work a book was written about the relationship between composition, crystal structure and optics of feldspar.

Classification of WenkiteHide

Approved
First Published:
1962
8/J.09-100
9.GD.25

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
D : Chains of 6-membered rings – tabular zeolites
76.2.5.16

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
17.10.28

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate

Physical Properties of WenkiteHide

Vitreous, Pearly
Transparency:
Transparent
Comment:
Greasy on fractures
Colour:
Light grey
Streak:
white
Hardness:
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Density:
3.19 - 3.24 g/cm3 (Measured)    3.276 g/cm3 (Calculated)

Optical Data of WenkiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.596 nε = 1.589
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of WenkiteHide

Formula:
(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
IMA Formula:
Ba4Ca6(Si,Al)20O41(OH)2(SO4)3 · H2O
Common Impurities:
Ti,Fe,Mn,Sr,Na,K,F,Cl

Crystallography of WenkiteHide

Crystal System:
Hexagonal
Cell Parameters:
a = 13.51 Å, c = 7.46 Å
Ratio:
a:c = 1 : 0.552
Unit Cell V:
1,179.18 ų (Calculated from Unit Cell)

Type Occurrence of WenkiteHide

Place of Conservation of Type Material:
Natural History Museum, Basel, Switzerland, MB14577.
Reference:
Papageorgakis, J. (1962) Wenkit, ein neues Mineral von Candoglia. Schweizerische Mineralogische und Petrographische Mitteilungen: 42: 269-274.

Other Language Names for WenkiteHide

German:Wenkit
Russian:Венкит
Spanish:Wenkita

Relationship of Wenkite to other SpeciesHide

Member of:
Other Members of this group:
AlflarseniteNaCa2Be3Si4O13(OH) · 2H2OMon. 2 : P21
AmiciteK2Na2Al4Si4O16 · 5H2OMon. 2
Ammonioleucite(NH4,K)(AlSi2O6)Tet.
AnalcimeNa(AlSi2O6) · H2OTric. 1 : P1
Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2OHex.
BikitaiteLiAlSi2O6 · H2OTric. 1 : P1
BoggsiteCa8Na3(Si,Al)96O192 · 70H2OOrth. mmm (2/m 2/m 2/m) : Imma
Brewsterite-Ba(Ba,Sr)[Al2Si6O16] · 5H2OMon. 2/m : P21/m
Brewsterite-Sr(Sr,Ba,Ca)[Al2Si6O16] · 5H2O
Chabazite-Levyne SubgroupA subgroup of the Zeolite Group.
ChiavenniteCaMnBe2Si5O13(OH)2 · 2H2OMon. 2/m : P21/b
ClinoptiloliteNote on the distinguishing differences between clinoptilolite and heulandite (hhttp://rruff.
CowlesiteCaAl2Si3O10 · 6H2OOrth.
Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2OMon.
Dachiardite-KK4(Si20Al4O48)·13H2OMon.
Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2OMon.
DirenzoiteNaK6MgCa2(Al13Si47O120) · 36H2OOrth. mmm (2/m 2/m 2/m) : Pmmn
EdingtoniteBa[Al2Si3O10] · 4H2O
EpistilbiteCaAl2Si6O16 · 5H2OMon.
ErioniteThis name now refers to a group of related minerals.
Faujasite
Faujasite-Ca(Ca,Na2,Mg)3.5[Al7Si17O48] · 32H2OIso.
FerrieriteZeolite Group.
FerrochiavenniteCa1-2Fe[(Si,Al,Be)5Be2O13(OH)2] · 2H2OMon. 2/m : P21/b
Flörkeite(K3Ca2Na)[Al8Si8O32] · 12H2OTric. 1 : P1
Garronite-CaNa2Ca5Al12Si20O64 · 27H2OTet. 4 2m : I4m2
GaultiteNa4Zn2Si7O18 · 5H2OOrth. mm2 : Fdd2
Gismondine-BaBa2Al4Si4O16 · 4-6H2O
Gismondine-CaCaAl2Si2O8 · 4H2O
GmeliniteIn 1997, gmelinite was split into Gmelinite-Ca, Gmelinite-Na and Gmelinite-K.
GobbinsiteNa5(Si11Al5)O32 · 11H2OOrth.
GoosecreekiteCa[Al2Si6O16] · 5H2OMon.
GottardiiteNa3Mg3Ca5Al19Si117O272 · 93H2OOrth.
Harmotome(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2OMon. 2/m : P21/m
Heulandite subgroupNote on the distinguishing differences between heulandite and clinoptilolite (http://rruff.
HsianghualiteCa3Li2(Be3Si3O12)F2
KirchhoffiteCs(BSi2O6)Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
LaumontiteCaAl2Si4O12 · 4H2OMon. 2/m : B2/m
LovdariteK2Na6Be4Si14O36 · 9H2OOrth. mm2
MaricopaitePb7Ca2(Si,Al)48O100 · 32H2OOrth.
Mazzite-Mg(Mg,K,Ca)5(Si26Al10)O72 · 28H2OHex.
Mazzite-NaNa8[Al4Si14O36]2 · 30H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
Merlinoite(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2OOrth.
Montesommaite(K,Na)9Al9Si23O64 · 10H2OOrth.
Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2OOrth.
MutinaiteNa3Ca4Si85Al11O192 · 60H2OOrth.
NabesiteNa2BeSi4O10 · 4H2OOrth. 2 2 2 : P21 21 21
Natrolite SubgroupA subgroup of the Zeolite Group.
OffretiteKCaMg(Si13Al5)O36 · 15H2OHex. 6 m2 : P6m2
PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2OIso. 2 3 : I2 3
ParthéiteCa2(Si4Al4) O15 (OH)2•4H2OMon. 2/m : B2/b
Paulingite-Ca(Ca,K,Na,Ba,◻)10 (Si, Al)42O84•34H2OIso.
Paulingite-K(K2,Ca,Na2,Ba)5[Al10Si35O90] · 45H2OIso.
Paulingite-Na(Na2,K2,Ca,Ba)5[Al10Si35O90] · 45H2OIso.
PerlialiteK9Na(Ca,Sr)[Al2Si4O12]6 · 15H2OHex.
PhillipsiteZeolite Group.
Pollucite(Cs,Na)2(Al2Si4O12) · 2H2OIso. m3m (4/m 3 2/m) : Ia3d
RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2OTet.
Stilbite subgroupThis name now refers to the zeolite subgroup including the Barrerite - Stilbite-Ca - ...
Terranovaite(Na,Ca)8(Si68Al12)O160 · 29H2OOrth.
Thomsonite-CaNaCa2[Al5Si5O20] · 6H2OOrth. mmm (2/m 2/m 2/m)
Thomsonite-SrNa(Sr,Ca)2[Al5Si5O20] · 7H2OOrth. mmm (2/m 2/m 2/m)
Tschernichite(Ca,Na2)[Al2Si4O12] · 4-8H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mmm
TschörtneriteCa4(Ca,Sr,K,Ba)3Cu3[(OH)2|Al3Si3O12]4 · nH2OIso. m3m (4/m 3 2/m) : Fm3m
WairakiteCa(Al2Si4O12) · 2H2OMon. 2/m
WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2OMon.
WillhendersoniteKCa[Al3Si3O12] · 5H2OTric.
YugawaraliteCaAl2Si6O16 · 4H2OMon.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Harmotome2 photos of Wenkite associated with Harmotome on mindat.org.
Apophyllite2 photos of Wenkite associated with Apophyllite on mindat.org.
Heulandite subgroup2 photos of Wenkite associated with Heulandite subgroup on mindat.org.
Diopside2 photos of Wenkite associated with Diopside on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.GD.05Gmelinite-CaCa2(Si8Al4O24] · 11H2OHex.
9.GD.05Gmelinite-KK4(Si8Al4O24) · 11H2OHex.
9.GD.05Gmelinite-NaNa4(Si8Al4O24] · 11H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.GD.10WillhendersoniteKCa[Al3Si3O12] · 5H2OTric.
9.GD.10Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2OTric. 1 : P1
9.GD.10Chabazite-K(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-Na(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-SrSr2[Al2Si4O12]2 · 12H2O
9.GD.10Chabazite-Mg(Mg0.7K0.5Ca0.5Na0.1)[Al3Si9O24]·10H2O Trig. 3m (3 2/m) : R3m
9.GD.15Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2OTrig. 3m (3 2/m) : R3m
9.GD.15Lévyne-Na(Na2,Ca,K2)[Al2Si4O12] · 6H2OTrig.
9.GD.20Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2OHex.
9.GD.20Erionite-Ca(Ca,K2,Na2)2[Al4Si14O36] · 15H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.GD.20Erionite-K(K2,Ca,Na2)2[Al4Si14O36] · 15H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.GD.20Erionite-Na(Na2,K2,Ca)2[Al4Si14O36] · 15H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.GD.25OffretiteKCaMg(Si13Al5)O36 · 15H2OHex. 6 m2 : P6m2
9.GD.30Faujasite-Ca(Ca,Na2,Mg)3.5[Al7Si17O48] · 32H2OIso.
9.GD.30Faujasite-Mg(Mg,Na2,Ca)3.5[Al7Si17O48] · 32H2OIso.
9.GD.30Faujasite-Na(Na2,Ca,Mg)3.5[Al7Si17O48] · 32H2OIso.
9.GD.35MaricopaitePb7Ca2(Si,Al)48O100 · 32H2OOrth.
9.GD.35Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2OOrth.
9.GD.40Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2OMon.
9.GD.40Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2OMon.
9.GD.45EpistilbiteCaAl2Si6O16 · 5H2OMon.
9.GD.50Ferrierite-K(K2,Na2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2OOrth.
9.GD.50Ferrierite-Mg(Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2OOrth.
9.GD.50Ferrierite-Na(Na2,K2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2OMon. 2/m
9.GD.55BikitaiteLiAlSi2O6 · H2OTric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

76.2.5.1Afghanite(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6Trig. 3m : P3 1c
76.2.5.2Bystrite(Na,K)7Ca(Al6Si6O24)(S5)ClHex.
76.2.5.3Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2OHex. 6 : P63
76.2.5.4CancrisiliteNa7(Al5Si7O24)(CO3) · 3H2OHex.
76.2.5.5Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2Hex. 6/m : P63/m
76.2.5.6Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2OHex.
76.2.5.7Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2Hex.
76.2.5.8HydroxycancriniteNa8(Al6Si6O24)(OH)2 · 2H2OHex.
76.2.5.9Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4Hex.
76.2.5.10MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2Hex.
76.2.5.11PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2OHex.
76.2.5.12Quadridavyne(Na,K)6Ca2(Al6Si6O24)Cl4Hex.
76.2.5.13Sacrofanite(Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6•2H2OHex.
76.2.5.14Tounkite(Na,Ca,K)8(Al6Si6O24)(SO4)2Cl · H2OHex.
76.2.5.15Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2OHex. 6 : P63

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.10.1NoseanNa8(Al6Si6O24)(SO4) · H2OIso. 4 3m : P4 3n
17.10.2PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2OHex.
17.10.3Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2OHex. 6 : P63
17.10.4Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)Iso. 4 3m : P4 3n
17.10.5Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4Hex.
17.10.6Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)Mon.
17.10.7Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
17.10.8MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2Hex.
17.10.9Delhayelite(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 · 18H2OOrth.
17.10.10HydrodelhayeliteKCa2AlSi7O17(OH)2 · 6H2OOrth.
17.10.11Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2Hex. 6/m : P63/m
17.10.12Afghanite(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6Trig. 3m : P3 1c
17.10.13Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2OHex.
17.10.14Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2Hex.
17.10.15Sacrofanite(Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6•2H2OHex.
17.10.16Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
17.10.17InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4Tric. 1 : P1
17.10.18ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
17.10.19Ellestadite
17.10.20ChlorellestaditeCa5(SiO4)1.5(SO4)1.5ClHex. 6/m : P63/m
17.10.21HydroxylellestaditeCa5(SiO4)1.5(SO4)1.5(OH)Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
17.10.22FluorellestaditeCa5(SiO4)1.5(SO4)1.5FHex.
17.10.23MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)Hex. 6/m : P63/m
17.10.24QueititePb4Zn2(SO4)(SiO4)(Si2O7)Mon. 2 : P21
17.10.25RoeblingitePb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2OMon. 2/m : B2/m
17.10.26YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)Tric. 1 : P1
17.10.27KegelitePb8Al4(Si8O20)(SO4)2(CO3)4(OH)8Mon.
17.10.29MacquartiteCu2Pb7(CrO4)4(SiO4)2(OH)2Mon.
17.10.30WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for WenkiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Papageorgakis, J. (1962) Wenkit, ein neues Mineral von Candoglia. Schweizerische Mineralogische und Petrographische Mitteilungen: 42: 269-274.
Fleischer, M. (1963) New mineral names. American Mineralogist: 48: 209-217.
Wenk, H.-R. (1966) New X-ray data for wenkite. Schweizerische Mineralogische und Petrographische Mitteilungen: 46: 85-88.
International Mineralogical Association (1967) Commission on new minerals and mineral names. Mineralogical Magazine: 36: 131-136.
Yanulova, M.K., Baigulov, E.M., Zaitseva, R.P. (1971) Wenkite in ores from the Karagaila deposit. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 100: 492-498 (in Russian).
Wenk, H.-R. (1973) The structure of wenkite. Zeitschrift für Kristallografie: 137: 113-126.
Merlino, S. (1974) The crystal structure of wenkite. Acta Crystallographica: B30: 1262-1266.
Lee, F. (1974) The submicroscopic structure of wenkite. American Mineralogist: 59(9/10): 1135-1136.
Lee, F. (1976) The submicroscopic structure of wenkite. In: Electron microscopy in mineralogy. Ed.: Wenk H.R., Springer Verlag, Berlin, 361-370.
Roth, P. (2007) Wenkite. in Minerals first discovered in Switzerland and minerals named after Swiss individuals, Kristallografik Verlag (Achberg Germany): 206-207.
Mineralogical Abstracts: 29: 263.

Internet Links for WenkiteHide

Localities for WenkiteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Italy (TL)
 
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Ossola Valley
        • Mergozzo
          • Candoglia
Papageorgakis, J. (1959): Ein neues Bariummineral des Marmors von Candoglia in der unteren Val d’Ossola. Schweizerische Mineralogische und Petrographische Mitteilungen, 39, 333-335; Papageorgakis, J. (1962): Wenkit, ein neues Mineral von Candoglia. Schweizerische Mineralogische und Petrographische Mitteilungen, 42, 269-274; AmMin 48:213 (1963); Gramaccioli, C.M. (1975): Minerali alpini e prealpini. Istituto Italiano Edizioni Atlas, Bergamo, 2 vol., 472 pp.; Mattioli, V. (1979): Minerali Ossolani. Ed. Arti Grafiche Medesi, Milano, 268 pp.; Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" di Alba, Ed., Alba, 607 pp.; Albertini, C., Gentile, P., Nibbio, F., Panighetti, A., Ponti, C. (2017): Wenkite. Un raro minerale delle cave di Candoglia, Mergozzo (Verbano-Cusio-Ossola). Rivista Mineralogica Italiana, 51, 3 (3-2017), 190-196.
Sweden
 
  • Dalarna
    • Hedemora
      • Garpenberg
Grensman, F., Kalinowski, M.P. and Sandström, F. (2001): Garpenberg Norra. Litofilen. 18 (2), 26-46.
  • Värmland
    • Filipstad
      • Nordmark district
        • Jakobsberg ore field
No reference listed
Mineral and/or Locality  
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