print 2570-7337
online 2570-7345

Zeolite mineralization with thomsonite-Ca from Babětín near Těchlovice in the České středohoří Mts. (Czech Republic)



A quite new occurrence of zeolite mineralization, dominated by thomsonite-Ca, has been discovered in a 130 m wide rock outcrop of olivine nephelinite volcanic body, at SW vicinity of the Babětín village, České středohoří mountains (Czech Republic). Thomsonite-Ca occurs there in several morphological forms: as lathy fan-like twins, brittle twins, hemispheral or compact aggregates. Its unit-cell parameters, refined from the powder X-ray data, are: a 13.1049(12), 13.0559(13) c 13.2464(12) Å and V 2266.4(4) Å3. Two types of thomsonite-Ca with different Sr contents were observed during chemical study - with following empirical formulas: Ca0.83Na1.04Sr0.39(Si5.35Al5.05)O20.6H2O and Ca1.67Na1.05 Sr0.12(Si5.22Al4.83)O20.6H2O. The determined Sr contents (up to 0.40 apfu) are the highest among occurrences of this mineral in the Czech Republic. Analcime, natrolite, mesolite and calcite were observed in the association with thomsonite-Ca. The succesion of crystallization on fissures and cavities of olivine nephelinite is following: analcime → natrolite (mesolite) → thomsonite-Ca → calcite.


Abstract (PDF) - 218.51KB
Fulltext (PDF) - 3.48MB


Alberti A, Cruciani G, Dauru I (1995) Order disorder in natrolite-group minerals. Eur J Mineral 7: 501-508

Coombs DS, Alberti A, Armbruster T, Artioli G, Colella C, Galli E, Grice JD, Liebau F, Mandarino JA, Minato H, Nickel EH, Passaglia E, Peacor DR, Quartieri S, Rinaldi R, Ross M, Sheppard RA, Tillmanns E, Vezzalini G (1997) Recommended nomenclature for zeolite minerals: report of the subcommittee on zeolites of the International Mineralogical Association, commission on new minerals and mineral names. Can Mineral 35:1571-1606

Gatta GD, Nestola F, Boffa Ballaran T (2006) Elastic behavior, phase transition, and pressure induced structural evolution of analcime. Amer Mineral 91: 568-578

Hibsch JE (1897) Erläuterungen zur geologischen Karte des böhmischen Mittelgebirges. Blatt III. (Bensen). Mit 1 geologischen Karte. Tschermaks mineral petrogr Mitt 17, 1: 1-96

Laugier J, Bochu B (2011) LMGP-Suite of Programs for the Interpretation of X-ray Experiments., přístup duben 2011

Pauliš P, Hrůzek L. Janeček O, Sejkora J, Malíková R (2014) Cowlesit a doprovodná mineralizace z vrchu Hackenberg u České Kamenice (Česká republika). Bull mineral-petrolog Odd Nár Muz (Praha) 22, 2: 248-260

Pauliš P, Janeček O, Hrůzek L, Sejkora J, Malíková R, Fediuk F, Pour O (2017): Nordstrandit a zeolitová mineralizace fonolitu Tachovského vrchu u Doks (Česká republika). Bull Mineral Petrolog 25, 1: 69-84

Pekov IV, Turchkova AG, Chukanov NV, Zadov AE, Grichin VG (2000) Chabazite-Sr, (Sr,Ca)[Al2Si4O12]·6H2O, a new zeolite mineral from Lovozero massif, Kola Peninsula. Zap Vseross mineral Obšč 129, 4: 54-58

Pouchou JL, Pichoir F (1985) “PAP” (φρZ) procedure for improved quantitative microanalysis. In: Microbeam Analysis (J. T. Armstrong, ed.). San Francisco Press, San Francisco, 104-106

Stahl K, Kvick A, Smith JV (1990) Thomsonite, a neutron diffraction study at 13K. Acta crystallogr Sect C 46: 1370-1373