Rucklidgeite Mineral Data

Rucklidgeite Mineral Data +

General Rucklidgeite Information

Chemical Formula:

(Bi,Pb)3Te4

Composition:

Molecular Weight = 1,136.01 gm

Bismuth 41.39 % Bi

Tellurium 44.93 % Te

Lead 13.68 % Pb

______

100.00 %

Empirical Formula:

Bi_2.25Pb_0.75Te₄

Environment:

Of hydrothermal origin.

IMA Status:

Approved IMA 1977

Locality:

Zod and Kochkar deposits, Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for J. C. Rucklidge, University of Toronto, Canada who first noticed the mineral.

Synonym:

ICSD 60089

IMA1975-029

PDF 38-458

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Rucklidgeite Crystallography

Axial Ratios:

a:c = 1:9.38263

Cell Dimensions:

a = 4.422, c = 41.49, Z = 3; V = 702.61 Den(Calc)= 8.05

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 3.22(1), 2.34(0.9), 1.473(0.6),

Physical Properties of Rucklidgeite

Cleavage:

[???] Perfect

Color:

Silver white.

Density:

7.739

Diaphaniety:

Opaque

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Streak:

lead gray

Optical Properties of Rucklidgeite

RL Anisotrophism:

Distinct, reddish brown to bluish gray.

RL Color:

White with a very weak rose tint.

RL Pleochroism:

Very weak in air, noticable in oil.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Rucklidgeite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	62.90	62.10
420 nm	62.90	62.00
440 nm	63.00	61.80
460 nm	63.20	61.80
480 nm	63.70	61.80
500 nm	64.40	61.90
520 nm	65.00	62.00
540 nm	65.30	62.10
560 nm	65.50	62.20
580 nm	65.80	62.20
600 nm	66.10	62.30
620 nm	66.40	62.40
640 nm	66.50	62.60
660 nm	66.60	62.80
680 nm	66.70	63.00
700 nm	66.60	63.20

**Calculated Relative Intensity Colors of Rucklidgeite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	150%
R₁
R₂

Calculated Properties of Rucklidgeite

Electron Density:

r_electron=6.47 gm/cc
note: r_Rucklidgeite=8.05 gm/cc.

Fermion Index

Fermion Index = 0.06613
Boson Index = 0.93387

Photoelectric:

PE_Rucklidgeite=1,262.22 barns/electron
U=PE_Rucklidgeite x r_electron=8,161.73 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Rucklidgeite is Not Radioactive

Rucklidgeite Classification

Dana Class:

2.6.2.7 (2)Sulfides - Including Selenides and Tellurides

(2.6)where Am Bn Xp, with (m+n):p=4:3

(2.6.2)Joseite Group (Trigonal: R3¯m)

2.6.2.1 Joseite Bi4(S,Te)3 R 3m 3 2/m

2.6.2.2 Joseite-B Bi4(S,Te)3 R 3m 3 2/m

2.6.2.3 Ikunolite Bi4(S,Se)3 R 3m 3 2/m

2.6.2.4 Laitakarite Bi4(Se,S)3 R 3m 3 2/m

2.6.2.5 Pilsenite Bi4Te3 R 3m 3 2/m

2.6.2.6 Poubaite PbBi2Se2(Te,S)2 R 3m 3 2/m

2.6.2.7 Rucklidgeite (Bi,Pb)3Te4 R 3m 3 2/m

2.6.2.8 Babkinite! Pb2Bi2(S,Se)3 P 3,P 3m Trig

Strunz Class:

II/D.12-50 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.12 - Tetradymite group, Poubaite - Rucklidgeite series

II/D.12-10 Kochkarite PbBi4Te7 P 3m1 3 2/m

II/D.12-20 Aleksite PbBi2Te2S2(?) P 3m1 3 2/m

II/D.12-30 Poubaite PbBi2Se2(Te,S)2 R 3m 3 2/m

II/D.12-40 Platynite? (Bi,Pb)3(Se,S)4 R 3m 3 2/m

II/D.12-50 Rucklidgeite (Bi,Pb)3Te4 R 3m 3 2/m

II/D.12-55 Saddlebackite! Pb2Bi2Te2S3 Unk Hex

II/D.12-60 Babkinite! Pb2Bi2(S,Se)3 P 3,P 3m Trig

Other Rucklidgeite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Rucklidgeite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Rucklidgeite

(Bi,Pb)3Te4
Dana No: 2.6.2.7 Strunz No: II/D.12-50
Locality:

Notes: