Susannite Mineral Data

Susannite Mineral Data +

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General Susannite Information

Chemical Formula:

Pb4(SO4)(CO3)2(OH)2

Composition:

Molecular Weight = 1,078.90 gm

Hydrogen 0.19 % H 1.67 % H₂O

Lead 76.82 % Pb 82.75 % PbO

Carbon 2.23 % C 8.16 % CO₂

Sulfur 2.97 % S 7.42 % SO₃

Oxygen 17.80 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₄(SO₄)(CO₃)₂(OH)₂

IMA Status:

Valid Species (Pre-IMA) 1845

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 87857

PDF 39-372

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Susannite Crystallography

Axial Ratios:

a:c = 1:1.27513

Cell Dimensions:

a = 9.05, c = 11.54, Z = 3; V = 818.53 Den(Calc)= 6.57

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 3.53(1), 2.917(0.6), 2.605(0.5),

Crystal Structure:

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Bindi L , Menchetti S , American Mineralogist , 90 (2005) p.1641-1647, Structural changes accompanying the phase transformation between leadhillite, and susannite: a structural study by means of in situ high-temperature single-, crystal X-ray diffraction, Sample: Chah Mileh Mine, Anarak District, Esfahan Province, Iran, Sample: T = 82C

View Additional jPOWD Structure files for Susannite
[1]

Physical Properties of Susannite

Cleavage:

[0001] Perfect

Color:

Colorless, Greenish, Yellowish, Light greenish yellow.

Density:

6.55

Diaphaniety:

Transparent to Translucent

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Hardness:

2.5-3 - Finger Nail-Calcite

Luminescence:

Fluorescent.

Luster:

Adamantine - Resinous

Streak:

white

Optical Properties of Susannite

Optical Data:

NCalc= 1.96 - from Gladstone-Dale relationship (KC = 0.1461) where Ncalc=Dcalc*KC+1
NCalc= 1.96 - from Gladstone-Dale relationship (KC = 0.1461) where Ncalc=Dmeas*KC+1

Calculated Properties of Susannite

Electron Density:

r_electron=5.53 gm/cc
note: r_Susannite=6.57 gm/cc.

Fermion Index

Fermion Index = 0.17032
Boson Index = 0.82968

Photoelectric:

PE_Susannite=1,401.45 barns/electron
U=PE_Susannite x r_electron=7,749.05 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Susannite is Not Radioactive

Susannite Classification

Dana Class:

17.1.3.1 (17)Compound Carbonates

(17.1)with miscellaneous formulae

(17.1.3)Dana Group

17.1.3.1 Susannite Pb4(SO4)(CO3)2(OH)2 R 3 3

Strunz Class:

VI/B.13-70 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. mostly big cations

VI/B.13 - Lanarkite - Susannite series

VI/B.13-10 Lanarkite Pb2(SO4)O C 2/m 2/m

VI/B.13-20 Olsacherite Pb2(SeO4)(SO4) P 2212 2 2 2

VI/B.13-30 Grandreefite Pb2SO4F2 A2/a 2/m

VI/B.13-40 Pseudograndreefite Pb6SO4F1O F 222 2 2 2

VI/B.13-50 Leadhillite Pb4(SO4)(CO3)2(OH)2 P 2₁/a 2/m

VI/B.13-60 Macphersonite Pb4(SO4)(CO3)2(OH)2 Pcab 2/m 2/m 2/m

VI/B.13-70 Susannite Pb4(SO4)(CO3)2(OH)2 R 3 3

Other Susannite Information

References:

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

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Susannite

Pb4(SO4)(CO3)2(OH)2
Dana No: 17.1.3.1 Strunz No: VI/B.13-70
Locality:

Notes: