Scheteligite Mineral Data

Scheteligite Mineral Data

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General Scheteligite Information

Chemical Formula:

(Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH)

Composition:

Molecular Weight = 424.56 gm

Calcium 10.38 % Ca 14.53 % CaO

Yttrium 8.38 % Y 10.64 % Y₂O₃

Tantalum 21.31 % Ta 26.02 % Ta₂O₅

Titanium 13.53 % Ti 22.58 % TiO₂

Manganese 2.59 % Mn 3.34 % MnO

Niobium 4.38 % Nb 6.26 % Nb₂O₅

Antimony 8.60 % Sb 10.30 % Sb₂O₃

Hydrogen 0.12 % H 1.06 % H₂O

Tungsten 4.33 % W 5.46 % WO₃

Oxygen 26.38 % O

______ ______

100.00 % 100.19 % = TOTAL OXIDE

Empirical Formula:

Ca_1.1Y_0.4Sb_0.3Mn²⁺_0.2Ti_1.2Ta_0.5Nb_0.2W_0.1O_6.5(OH)_0.5

Environment:

A questionable mineral.

IMA Status:

Discredited IMA 1977

Locality:

Torvelona, Iveland, Norway. Link to MinDat.org Location Data.

Name Origin:

Named in 1937 for Jacob Schetelig (1875-1935), Norwegian mineralogist, director of the Oslo Mineralogical Museum.

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Scheteligite Crystallography

Crystal System:

OrthorhombicSpace Group: Unk

Physical Properties of Scheteligite

Color:

Black.

Density:

4.74

Diaphaniety:

Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

5.5 - Knife Blade

Luster:

Adamantine

Optical Properties of Scheteligite

Gladstone-Dale:

CI meas= 0.053 (Good) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2215,KC= 0.2338

Optical Data:

Biaxial (?), b=2.05

Calculated Properties of Scheteligite

Electron Density:

r_electron=4.31 gm/cc
note: r_Scheteligite=4.74 gm/cc.

Fermion Index

Fermion Index = 0.02397
Boson Index = 0.97603

Photoelectric:

PE_Scheteligite= 342.85 barns/electron
U=PE_Scheteligite x r_electron=1,476.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Scheteligite is Not Radioactive

Scheteligite Classification

Dana Class:

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

(8.2)where (A)2 (B2O6) (O,OH,F)

(8.2.6)Dana Group

8.2.6.1 Scheteligite ? (Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH) Unk Ortho

Strunz Class:

IV/C.14-20 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.14 - Stibiconite group, Murataite-Y - Scheteligite series

IV/C.14-10 Murataite (Y,Na)6(Zn,Fe)5(Ti,Nb)12O29(O,F)14 F43m 4 3m

IV/C.14-20 Scheteligite (Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH) Unk Ortho

Other Scheteligite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Print or Cut-and-Paste your Scheteligite Specimen Label here :

Scheteligite

(Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH)
Dana No: 8.2.6.1 Strunz No: IV/C.14-20
Locality:

Notes: