Fuloppite Mineral Data

Fuloppite Mineral Data +

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General Fuloppite Information

Chemical Formula:

Pb3Sb8S15

Composition:

Molecular Weight = 2,076.59 gm

Antimony 46.90 % Sb

Lead 29.93 % Pb

Sulfur 23.16 % S

______

100.00 %

Empirical Formula:

Pb₃Sb₈S₁₅

Environment:

Of hydrothermal origin.

IMA Status:

Valid Species (Pre-IMA) 1929

Locality:

Baia Mare, Satul-Mare, Rumania. Link to MinDat.org Location Data.

Name Origin:

For Dr. Bela Fulopp.

Fuloppite Image

Images:

Fuloppite

Comments: Gray crystals of f?l?ppite on quartz.
Location: Neue Hoffnung Gottes Mine, Br?unsdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Fuloppite Crystallography

Axial Ratios:

a:b:c =1.4456:1:1.1454

Cell Dimensions:

a = 16.9, b = 11.69, c = 13.39, Z = 4; beta = 94.72° V = 2,636.37 Den(Calc)= 5.23

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 3.87(1), 3.22(0.7), 2.96(0.4),

Forms:

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Forms: [ 1 1 4] [ 1 1 2] [ 1 1 4] [ 1 1 2] [ 1 0 0] [ 0 0 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

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Swinnea J S , Tenorio A J , Steinfink H , American Mineralogist , 70 (1985) p.1056-1058, Sb10S15, a Pb-free analogue of fueloeppite, Pb3Sb8S15

View Additional jPOWD Structure files for Fuloppite
[1]

Physical Properties of Fuloppite

Color:

Gray, Bronze yellow, Steel blue.

Density:

5.22

Diaphaniety:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Metallic

Streak:

reddish gray

Optical Properties of Fuloppite

RL Anisotrophism:

Moderate in blue-green to red-brown.

RL Color:

Bronzy white.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Fuloppite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	33.70	42.60
420 nm	33.60	42.20
440 nm	33.50	41.80
460 nm	33.10	41.40
480 nm	32.50	40.80
500 nm	32.20	40.40
520 nm	32.00	40.20
540 nm	31.90	40.10
560 nm	31.70	40.00
580 nm	31.20	39.60
600 nm	30.50	38.80
620 nm	29.50	37.70
640 nm	28.40	36.40
660 nm	27.60	35.10
680 nm	26.90	34.30
700 nm	26.50	33.80

**Calculated Relative Intensity Colors of Fuloppite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	300%
R₁
R₂

Calculated Properties of Fuloppite

Electron Density:

r_electron=4.50 gm/cc
note: r_Fuloppite=5.23 gm/cc.

Fermion Index

Fermion Index = 0.06789
Boson Index = 0.93211

Photoelectric:

PE_Fuloppite= 695.26 barns/electron
U=PE_Fuloppite x r_electron=3,130.87 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Fuloppite is Not Radioactive

Fuloppite Classification

Dana Class:

3.6.20.1 (3)Sulfides - Sulfosalts

(3.6)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.6.20)Fuloppite Group (Monoclinc: C2/c containing Pb, Sb)

3.6.20.1 Fuloppite Pb3Sb8S15 C 2/c 2/m

3.6.20.2 Plagionite Pb5Sb8S17 C 2/c 2/m

3.6.20.3 Heteromorphite Pb7Sb8S19 C 2/c 2/m

3.6.20.4 Semseyite Pb9Sb8S21 C 2/c 2/m

3.6.20.5 Rayite (Ag,Tl)2Pb8Sb8S21 C 2/c 2/m

Strunz Class:

II/E.21-50 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x), Sulfosalts with predominant Iron and Copper x = 2.0

II/E.21 - Rayite - Fülöppite series

II/E.21-10 Rayite (Ag,Tl)2Pb8Sb8S21 C 2/c 2/m

II/E.21-20 Semseyite Pb9Sb8S21 C 2/c 2/m

II/E.21-30 Heteromorphite Pb7Sb8S19 C 2/c 2/m

II/E.21-40 Plagionite Pb5Sb8S17 C 2/c 2/m

II/E.21-50 Fuloppite Pb3Sb8S15 C 2/c 2/m

Other Fuloppite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

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

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

Fuloppite

Pb3Sb8S15
Dana No: 3.6.20.1 Strunz No: II/E.21-50
Locality:

Notes: