Accessory minerals include eudialyte (which may constitute up to 3% of the rock in some zones of the sill), analcime, rinkite and astrophyllite.
A characteristic of the mineral assemblage, which is similar to that in miarolitic cavities, is an abundance of closely associated astrophyllite, lavenite, rinkite and lorenzenite.
Labuntsovite Lavenite Lemoynite Lorenzenite Magadiite Makatite Mangan-neptunite Microcline Montmorillonite Muscovite Natrolite Nenadkevichite Nepheline Opal Paranatrolite Pectolite Polylithionite Quartz Rinkite Sazhinite-(Ce) Serandite Shkatulkalite Smectite grp.
Kukharenkoite-(Ce) is a late-stage mineral in the paragenetic sequence, associated with microcline, natrolite, eudialyte, mangan-neptunite, aegirine, rinkite, pyrite, zakharovite, yofortierite, lavenite, astrophyllite and calcite.
It occurs as translucent to opaque, beige to yellow and orange-yellow, radiating or divergent fibrous sprays and coralloidal aggregates with a greasy luster; as vitreous, transparent to translucent, thin bladed acicular crystals 1-5 mm long; and as silky, matted, yellow to brown fibrous masses 1-2 mm across, typically associated with rinkite, astrophyllite, lorenzenite, aegirine and albite.
Generally, lorenzenite is one of the early minerals in the paragenesis, most frequently associated with microcline, astrophyllite, mangan-neptunite, eudialyte, aegirine, lavenite and rinkite. Lorenzenite was also found in an altered "natrolite pipe" as a very unusual, late-stage overgrowth on natrolite.
Rinkite is relatively common, found most frequently in mineralized seams, in tiny isolated rugs, and rarely in miarolitic cavities.
Rinkite is a mid to late-stage species in the paragenesis of the mineralized seams and miarolitic cavities, and is associated with most species found in these.
The current view (Fleischer and Mandarino, 1995) is that rinkite is a valid species, and mosandrite is an altered variety of rinkite.
(1971) Crystal structure of rinkite. Acta Crystallographica, B27, 1277-1284.
(1963) The structure of rinkite, Na[(Ca,Ce).sub.2](Ti,Ce)O[[Si.sub.2][O.sub.7]]F.