, thomsonite, and calcite constitute the stable alteration minerals competing for Ca at low temperature, followed by their progressive replacement by epidote, wairakite, and prehnite with increased temperature.
(Rio Grande de Sol, Brazil) is one of the microporous, aluminosilicate minerals known as zeolites, commonly used as commercial absorbents and catalysts--including producing medical oxygen.
Prakash, "Thin layer chromatographic separation of a few food dyes over scolecite
as a new adsorbent," Chromatographia, vol.
Wise, Thermodynamic studies of zeolites: Natrolite, Msolite, and Scolecite
, American Mineralogist., 68, 1134 (1983).
Very recently, literature survey reveals several methods for synthesis of 2,4,5-triaryl imidazoles using ionic liquid , iodine , ZrCL, , NH4OAc , Yb[(OTf).sub.3] , scolecite
, PEG-400 , Lproline , HOAc , Cu[Cl.sub.2][H.sub.2]O , silica sulfuric acid , S[O.sub.4]/Ce[O.sub.2] , and Sb[Cl.sub.3] .
They were followed by acicular-fibrous zeolites such as natrolite/ gonnardite, thomsonite, mesolite and scolecite
Analcime is usually a Na-rich mineral phase, but may sometimes contain appreciable K (Utada, 1970).
An internal standard (scolecite
) was used in addition to the standard regularly used.
A number of other zeolites have also been reported from Merelani, including laumontite and mesolite in tufts of acicular white crystals, and stilbite, scolecite
Merchant could not confirm--that the tiny crystals originally were some zeolite (scolecite
?), now replaced by the opaque white chalcedony.
Powellite on Scolecite
Nasik, India 6" wide (Powellite crystal 3" tall) ex-collection Joseph Freilich
Numerous dealers at this show, as at nearly all major shows these days, had superb specimens of (oh, let's see) Veracruz, Mexico amethyst; Moroccan vanadinite and cerussite; Pikes Peak, Colorado microcline (and even topaz); apophyllite, stilbite, calcite, scolecite
Yet even these great mesolite specimens are exceeded in size by several of the 100 scolecite
specimens taken in January 2008 from a quarry near Junnar village.