Ternovite Mineral Data

Ternovite Mineral Data +

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General Ternovite Information

Chemical Formula:

(Mg,Ca)Nb4O11-n(H2O) where n ~ 10

Composition:

Molecular Weight = 756.81 gm

Calcium 1.59 % Ca 2.22 % CaO

Magnesium 2.25 % Mg 3.73 % MgO

Niobium 49.10 % Nb 70.24 % Nb₂O₅

Hydrogen 2.66 % H 23.80 % H₂O

Oxygen 44.40 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg_0.7Ca_0.3Nb₄O₁₁·10(H₂O)

Environment:

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.

Synonym:

IMA1992-044

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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

Crystal System:

MonoclinicSpace Group: P 2/m,P 2,Pm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 10.33(1), 3.15(0.17), 3.12(0.15),

Physical Properties of Ternovite

Cleavage:

None

Color:

White.

Density:

2.95

Diaphaniety:

Translucent

Fracture:

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

Optical Data:

Biaxial (-), a=1.725, b=1.83, g=1.845, bire=0.1200, 2V(Calc)=38, 2V(Meas)=39.5. Dispersion none.

Calculated Properties of Ternovite

Electron Density:

r_electron=2.85 gm/cc
note: r_Ternovite=2.94 gm/cc.

Fermion Index

Fermion Index = 0.00248
Boson Index = 0.99752

Photoelectric:

PE_Ternovite= 72.04 barns/electron
U=PE_Ternovite x r_electron= 205.07 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ternovite is Not Radioactive

Ternovite Classification

Dana Class:

8.6.1.3 (8)Multiple Oxides with Nb, Ta, and Ti

(8.6)Dana Type

(8.6.1)Dana Group

8.6.1.1 Franconite Na2Nb4O11·9(H2O) Unk Mono

8.6.1.2 Hochelagaite (Ca,Na,Sr)Nb4O11·8(H2O) Unk Mono

8.6.1.3 Ternovite ! (Mg,Ca)Nb4O11-n(H2O)wheren~10 P 2/m,P 2,Pm Mono

Strunz Class:

IV/D.06-35 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.06 - Belyankinite - Hochelagaite series

IV/D.06-10 Belyankinite Ca1-2(Ti,Zr,Nb)5O12·9(H2O)(?) None

IV/D.06-20 Manganbelyankinite (Mn,Ca)(Ti,Nb)5O12·9(H2O) None

IV/D.06-30 Gerasimovskite (Mn,Ca)(Nb,Ti)5O12·9(H2O)(?) None

IV/D.06-35 Ternovite (Mg,Ca)Nb4O11-n(H2O)wheren~10 P 2/m,P 2,Pm Mono

IV/D.06-40 Franconite Na2Nb4O11·9(H2O) Unk Mono

IV/D.06-50 Hochelagaite (Ca,Na,Sr)Nb4O11·8(H2O) Unk Mono

Other Ternovite Information

References:

NAME( CanMin, 8/99) PHYS. PROP.(Am.Min.,Vol.83,p187,1998) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Ternovite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Ternovite

(Mg,Ca)Nb4O11-n(H2O) where n ~ 10
Dana No: 8.6.1.3 Strunz No: IV/D.06-35
Locality:

Notes: