Rouseite Mineral Data

General Rouseite Information

Chemical Formula:

Pb2Mn++(As+++O3)2•2(H2O)

Composition:

Molecular Weight = 874.13 gm

Manganese 6.28 % Mn 8.12 % MnO

Arsenic 25.71 % As 33.95 % As₂O₃

Hydrogen 0.46 % H 4.12 % H₂O

Lead 47.41 % Pb 51.07 % PbO

Oxygen 20.13 % O

______ ______

100.00 % 97.25 % = TOTAL OXIDE

Empirical Formula:

Pb₂Mn²⁺(AsO₃)₃•2(H₂O)

IMA Status:

Approved IMA 1986

Locality:

Langban, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Rolnd Rouse (1943-), U. S. Mineralogist.

Name Pronunciation:

Rouseite

Rouseite Crystallography

Axial Ratios:

a:b:c =0.8724:1:0.7599

Cell Dimensions:

a = 6.36, b = 7.29, c = 5.54, Z = 1; alpha = 97.3°, beta = 114.2°, gamma = 106° V = 223.38 Den(Calc)= 6.50

Crystal System:

Triclinic Space Group: P1,P 1

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

By Intensity(I/I_o): 6.81(1), 2.849(0.9), 2.983(0.8),

Physical Properties of Rouseite

Cleavage:

{010} Perfect, {100} Perfect

Color:

Yellow orange.

Density:

4.2 - 5.7, Average = 4.95

Diaphaneity:

Transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

3 - Calcite

Luster:

Vitreous - Adamantine

Streak:

yellow

Optical Properties of Rouseite

Gladstone-Dale:

CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.286 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1269,KPDmeas= 0.1717,KC= 0.1777
Ncalc = 1.75 - 2.19

Optical Data:

Biaxial (-), a=1.8, g=1.9, bire=0.1000, 2V(Meas)=46. Dispersion r > v.

Calculated Properties of Rouseite

Electron Density:

Bulk Density (Electron Density)=4.30 gm/cc
note: Specific Gravity of Rouseite =4.95 gm/cc.

Fermion Index:

Fermion Index = 0.1
Boson Index = 0.9

Photoelectric:

PE_Rouseite= 857.96 barns/electron
U=PE_Rouseite x rElectron Density=3,692.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rouseite is Not Radioactive

Rouseite Classification

Dana Class:

45.01.02.02 (45)Acid and normal Antimonites, Arsenites and Phosphites

(45.01)with miscellaneous formulae

(45.01.02)Trigonite Group

45.01.02.01 Trigonite Pb3Mn(AsO3)2(AsO2OH) Pn m

45.01.02.02 Rouseite Pb2Mn(AsO3)2•2(H2O) P1,P 1 Tri

Strunz Class:

04.JC.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JC -Arsenites, antimonites, bismuthites; without additional anions, with H2O

04.JC.15 Rouseite Pb2Mn(AsO3)2•2(H2O) P1,P 1 Tri

Other Rouseite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.71,p1034-1036,1986) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Rouseite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Rouseite

Pb2Mn++(As+++O3)2•2(H2O)
Dana No: 45.01.02.02 Strunz No: 04.JC.15
Locality:

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