One rock may also have traces of astrophyllite
. Some of the rocks contain graphic and myrmekitic intergrowths of quartz and feldspar.
[(K,Na).sub.3]([Fe.sup.2+]Mn)[Ti.sub.2][Si.sub.8][O.sub.24][(O,OH).sub.7], optically determined by Beydoun and Bichan (1969) and plumbomicrolite Pb[(TaNb).sub.2][O.sub.6](OH) of our new analysis by EMPA (see Edax record Fig.
= magnesioastrophyllite: there are many minerals with magnesio- as prefix
Natrolite in the cavities is overgrown by calcite, fluorite, barytocalcite, podlesnoite, astrophyllite
and, in minor amounts, burbankite, lemmleinite-K and fluorapophyllite.
There were a lot of fine minerals represented, from astrophyllite
to zircon, all self-collected and all in fine condition.
Associated minerals are: natrolite, aegirine, microcline, catapleiite, fluorapatite, titanite, fluorite, galena, sphalerite, strontianite, annite, astrophyllite
, lorenzenite, labuntsovite-Mn, kuzmenkoite-Mn, cerite-(Ce), edingtonite, ilmenite and calcite.
The principal rock of the Warsak igneous complex is a medium-grained, gneissic alkaline granite (Kempe, 1973) composed of microcline with minor albite, quartz, aegirine, riebeckite and astrophyllite
. The gneissic lineation is imparted by the alignment of riebeckite and aegirine needles and is considered by Ahmad et al.
Occurrence: At Rasvumchorr, in veinlets cross-cutting natrolite of ristscorrite pegmatite; associated minerals are: microcline, aegirine, annite, astrophyllite
, magnetite, fluorapatite, pyrophanite, thomsonite-Ca, etc.
Associated minerals at Nanna are aegirine, astrophyllite
, analcime, calcio-ancylite-(Ce), catapleiite, fluorite, galena, gibbsite, leucophanite, microcline, natrolite, nafertisite, orthoclase, polylithionite, sodalite (var.
There were aegirine crystals with oddly clubbed ends; pale pink, blocky ancylite crystals; spiky balls of calcite; very complicated, water-clear crystals of an unknown mineral; tiny, resinous brown crystals of a second mineral showing a hexagonal pyramid termination, and pale brown sprays that were obviously astrophyllite
Type-III: very fine-grained acicular crystals in sheaf-like aggregates (originally described as "witch's broom astrophyllite
The syenite pegmatites contain calcium catapleiite, titanium-rich lavenite, lorenzenite, cesium-rich astrophyllite
, kupletskite, pyrophanite, leucophanite, strontium-apatite, loparite, calcium-rich seidozerite, strontium-rich and zirconium-rich perrierite, brookite, landauite, murataite, polylithionite, brewsterite, chabazite, monazite, ancylite, bertrandite, vlasovite, hambergite.