Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Heulandite Subgroup from
A2 Highway tunnel (Falkenberg tunnel), Wölfnitz, Klagenfurt am Wörthersee, Carinthia, Austria


Locality type:Tunnel
Classification
Species:'Heulandite Subgroup' (not an IMA approved species)
Formula:(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Heulandite Subgroup data
Locality Data:Click here to view A2 Highway tunnel (Falkenberg tunnel), Wölfnitz, Klagenfurt am Wörthersee, Carinthia, Austria
Data Identifiers
Mindat Occurrence Record ID:201283
Long-form Identifier:1:3:201283:4
GUID (UUID V4):0
Nearest other occurrences of Heulandite Subgroup
4.1km (2.6 miles) ⓘA2 Highway tunnel, Ehrentaler Berg, Klagenfurt am Wörthersee, Carinthia, Austria
39.0km (24.3 miles) ⓘGertrusk, Wolfsberg, Wolfsberg District, Carinthia, Austria
40.5km (25.2 miles) ⓘIrregger Schwaig (Schumetzkogel), Lölling, Hüttenberg, Sankt Veit an der Glan District, Carinthia, Austria
46.6km (29.0 miles) ⓘBasalt quarry, Kollnitz, Sankt Paul im Lavanttal, Wolfsberg District, Carinthia, Austria
56.5km (35.1 miles) ⓘA2 motorway tunnel, Übelskogel, Bad Sankt Leonhard im Lavanttal, Wolfsberg District, Carinthia, Austria
57.8km (35.9 miles) ⓘKoglereck quarry, Sankt Vinzenz, Lavamünd, Wolfsberg District, Carinthia, Austria
58.1km (36.1 miles) ⓘHematite Mine, Waldenstein, Wolfsberg, Wolfsberg District, Carinthia, Austria
58.6km (36.4 miles) ⓘWolfsberg, Spittal an der Drau, Spittal an der Drau District, Carinthia, Austria
60.0km (37.3 miles) ⓘGradischkogel, Sankt Vinzenz, Lavamünd, Wolfsberg District, Carinthia, Austria
60.7km (37.7 miles) ⓘSpodumene prospect, Brandrücken, Frantschach-Sankt Gertraud, Wolfsberg District, Carinthia, Austria
References
Niedermayr, G.; Praetzel, I. (1995) Mineralien Kärntens. Naturwissenschaftlicher Verein für Kärnten. 232 pp.
 
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