In hydrothermal alteration zones of carbonatites as encrustations with other later minerals on primary minerals. The Mg-dominant analogue of hochelagaite and franconite.
IMA Status:
Approved IMA 1997 (Dana # Added)
Locality:
The central part of the Vuoriyarvi massif on the north shore of Vuoriyarvi Lake, North Karelia, Kola peninsula, Russia. Link to MinDat.org Location Data.
Name Origin:
Named after Vladimir Ivanovich Ternovoi (1928�1980), economic geologist, a pioneer in studies of the Kovdor phlogopite depost.
Name Pronunciation:
Ternovite + Pronunciation
Synonym:
IMA1992-044
Ternovite Crystallography
Axial Ratios:
a:b:c =1.5813:1:0.4852
Cell Dimensions:
a = 20.656, b = 13.062, c = 6.338, Z = 4; beta = 90.917° V = 1,709.83 Den(Calc)= 2.94
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Habit:
Spherical - Spherical, rounded aggregates.
Hardness:
3 - Calcite
Luster:
Adamantine - Silky
Streak:
white
Optical Properties of Ternovite
Gladstone-Dale:
CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2721,KPDmeas= 0.2712,KC= 0.2813 Ncalc = 1.83
Chemical Formula: 