Images
Formula: NaKCaSrCeTi(Si8O21)OF(H2O)3
Unclassified silicate, strontium-,
cerium- and titanium- bearing mineral
Crystal System: Monoclinic
Specific gravity: 3.120 calculated
Streak: White
Colour: Colourless
Luminescence: Does not fluoresce under cathode waves or UV
Environments
Kalyuzhnyite-(Ce) is a new mineral, approved in 2023 and to date (March 2024) reported only from the type
locality.
Localities
At the type locality, the Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan,
kalyuzhnyite-(Ce) occurs in the moraine of the Dara-i-Pioz glacier. It was found in boulders of
quartz rock up to 2 m across. The following minor and accessory minerals are
present: large golden-brown tabular and lamellar crystals of
polylithionite up to 10 cm across, pink plates of
sogdianite–sugilite, pale yellow
to orange aggregates and tabular crystals of reedmergnerite, black
crystals of aegirine, orange–brown semi-transparent lenticular crystals of
stillwellite-(Се), grass-green or yellowish green semi-transparent and
transparent crystals of leucosphenite, dark green crystals of
turkestanite and aggregates of large white grains of
microcline. Also present are fine-grained brown or greyish brown aggregates
of manganese-bearing pectolite,
quartz, strontium-bearing
fluorite and a variety of rare minerals.
Kalyuzhnyite-(Ce) occurs in these pectolite-rich aggregates,
associated with quartz, fluorite,
pectolite, baratovite,
aegirine, leucosphenite,
neptunite, reedmergnerite,
orlovite, sokolovaite,
mendeleevite-(Ce),
odigitriaite, pekovite,
zeravshanite, kirchhoffite
and garmite.
Kalyuzhnyite-(Ce) occurs as equant grains with poorly developed faces in a
quartz–pectolite aggregate. The
grains are colourless and have a vitreous lustre. Individual grains show no visible twinning
(MM 88, 19-30).
Back to Minerals