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The Canadian Mineralogist; June 2007; v. 45; no. 3; p. 529-539; DOI: 10.2113/gscanmin.45.3.529
© 2007 Mineralogical Association of Canada
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GJERDINGENITE-Na AND GJERDINGENITE-Ca, TWO NEW MINERAL SPECIES OF THE LABUNTSOVITE GROUP

Igor V. Pekov1,§, Nikita V. Chukanov2, Natalia A. Yamnova3, Aleksandr E. Zadov4 and Peter Tarassoff5

1 Department of Mineralogy, Faculty of Geology, Moscow State University, Vorobyovy Gory, 119899 Moscow, Russia
2 Institute of Problems of Chemical Physics, 142432 Chernogolovka, Moscow Oblast, Russia
3 Department of Crystallography, Faculty of Geology, Moscow State University, Vorobyovy Gory, 119899 Moscow, Russia
4 NPO Regenerator, 3rd Passage of Mar’ina Roshcha 40, 127018 Moscow, Russia
5 Redpath Museum, McGill University, 859 Sherbrooke Street West, Montreal, Québec H3A 2K6, Canada


Figure 1
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  		FIG. 1. Pseudomorphs of gjerdingenite-Na (Gje) after vuonnemite with eudialyte and two generations of aegirine (right part of the specimen). Specimen 8 cm across. P. Tarassoff photo.

 

Figure 2
Figure 2
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  		FIG. 2. SEM photomicrographs of gjerdingenite-Na: (a) aggregates of crystals incrusting a cavity in a massive pseudomorph after vuonnemite; (b) cluster of pseudo hexagonal prismatic crystals on microcline.

 

Figure 3
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  		FIG. 3. Infrared spectra of gjerdingenite-Na (1) and gjerdingenite-Ca (2).

 




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