ISSN

print 2570-7337
online 2570-7345

Zeolitová mineralizace ze Svoru u Nového Boru (Česká republika)

Zeolite mineralization from Svor near Nový Bor (Czech Republic)


Klíčová slova

Abstrakt

An interesting zeolite association has been found at an unnamed hill (altitude 455 m) near the Svor village, 7 km NE of Nový Bor (Czech Republic). Zeolites were found in the cavities located at the contact of basalt, vulcanite tuffs and breccia. The most abundant zeolite, offretite, occurs as acicular crystals up to 1 mm in length, rarely also forms sheaf-like and hemispheric clusters. It is monoclinic, space group P-6m2 with unit-cell parameters: a 13.283(9), c 7.6115(3) Å and V 1163.0(8) Å3. Chemical analyses of offretite correspond to the empirical formula K1.10Na0.03Ca1.01Mg0.48(Si12.87Al5.21Fe0.15)O36.15 H2O. Heulandite-Ca, forms twins of hemispheric shapes or fan-like twins up to 2 mm across. It is monoclinic, space group C2/m with unit-cell parameters: a 17.726(4), b 17.829(4), c 7.428(2) Å, β 116.32(1)° and V 2104.2(9) Å3. On the basis of chemical composition, two varieties of heulandite-Ca were determined, the Mg-rich one with empirical formula (Ca1.87Mg1.25Sr0.05Ba0.01K0.84Na0.20)Σ4.22(Si28.56Al7.46)O72.26 H2O and Ba-rich one with empirical formula (Ca1.99K1.51Ba1.35Na0.31)5.16(Si26.99Al9.18)O72.26 H2O. Two other zeolite species, chabazite-Ca and phillipsite-K were also found in the observed association.

Soubory

Abstrakt (PDF) - 239.12KB
Fulltext (PDF) - 3.12MB

Reference

Coombs D. S., Alberti A., Armbruster T., Artioli G., Colella C., Galli E., Grice J. D., Liebau F., Mandarino J. A., Minato H., Nickel E. H., Passaglia E., Peacor D. R., Quartieri S., Rinaldi R., Ross M., Sheppard R. A., 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.

Černý P., Povondra P. (1969) A polycationic strontian heulandite; comments on crystal chemistry and classification of heulandite and clinoptilolite. N. Jb. Mineral., Mh. 349-361.

Deer W. A., Howie R. A., Wise W. S., Zussman J. (2004) Rock-forming Minerals, Framework Silicates: Silica Minerals, Feldspathoids and the Zeolites. Vol. 4B. The Geological Society London.

Galli E., Gottardi G., Mayer H., Preisinger A., Passaglia E. (1983) The structure of potassium-exchanged heulandite at 293, 373 and 593 K. Acta cryst. B39, 189-197.

Gatta G. D., Cappelletti P., Rotiroti N., Slebodnick C., Rinaldi R. (2009) New insights into the crystal structure and crystal chemistry of the zeolite phillipsite. Am. Mineral. 94, 190-199.

Gualtieri A., Artioli G., Passaglia E., Bigi S., Viani A., Hanson J. C. (1998) Crystal structure – crystal chemistry relationships in the zeolites erionite and offretite. Am. Mineral. 83, 590-606.

Kratochvíl J. (1963) Topografická mineralogie Čech VI. NČSAV, Praha.

Larsen A. O., Nordrum F. S., Döbelin N., Armbruster T., Petersen O. V., Erambert M. (2005) Heulandite-Ba, a new zeolite species from Norway. Eur. J. Mineral. 17, 143-153.

Laugier J., Bochu B. (2011) LMGP-Suite of Programs for the Interpretation of X-ray Experiments. http://www.ccp14.ac.uk/tutorial/lmgp, přístup duben 2011.

Pauliš P., Hrůzek L., Janeček O., Dvořák Z., Toman J., Svejkovský J., Radoň M. (2015a) Nejzajímavější mineralogická naleziště Čech – zeolity a doprovodná mineralizace. Kuttna,Kutná Hora. 280 s.

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., Hrůzek L., Janeček O., Sejkora J., Malíková R., Fediuk F. (2016) Zeolitová mineralizace z Nového Oldřichova u Kamenického Šenova (Česká republika). Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 23, 1, 100-113.

Pauliš P., Hrůzek L., Janeček O., Sejkora J., Malíková R., Pour O., Fediuk F. (2015b) Tschernichit, garronit-Ca a doprovodná zeolitová mineralizace z Jehly u České Kamenice (Česká republika). Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 23, 2, 147-170.

Pauliš P., Radoň M., Janeček O., Dvořák Z., Svejkovský J., Jebavá I., Řehoř M. (2012) Erionit-Ca z Michlova vrchu u Provodína, jv. od České Lípy (Česká republika). Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 20, 2, 213-217.

Pauliš P., Svejkovský J., Janeček O., Hrůzek L., Dvořák Z., Jebavá I. (2013) Offretit z kamenolomu Vrbička u Valče v Doupovských horách. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 21, 2, 171-178.

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

Tschernich R. W. (1992) Zeolites of the world. Geoscience Press, Phoenix.

Yakubovich O. V., Massa W., Gavrilenko P. G., Pekov I. V. (2005) Crystal structure of chabazite. Kristallografiya 50, 4, 595-604.

Žák L. (1978) Mineralogie chvaletického ložiska. Acta Univ. Carol., Geol. 3-4, 457-471.