© Doug Merson
(Na,HO,K,Sr,Ba)(Ti,Nb)[Si12](OH,O) · 3H
Tsepinite-Na is a new member of the labuntsovite-nenadkevichite recently identified on specimens collected back in 1981-1982 from the Horváath collection.
Color is white.
Luster is vitreous.
Diaphaneity is opaque.
Crystal System is monoclinic; m.
Crystal Habits include short prismatic crystals to 4 mm.
Hardness is 5.
Specific Gravity is approximately 2,74 g/cm
Streak is white.
Associated Minerals include aegirine, catapleiite, natrolite, rhodochrosite
Other Properties brittle.
Origin described in 2001 after Anatoliy I. Tsepin (b. 1946), Russian microprobe analyst.
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE: