Quenselite Mineral Data

Quenselite Mineral Data +

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General Quenselite Information

Chemical Formula:

PbMn+++O2(OH)

Composition:

Molecular Weight = 311.14 gm

Manganese 17.66 % Mn 25.37 % Mn₂O₃

Hydrogen 0.32 % H 2.89 % H₂O

Lead 66.59 % Pb 71.74 % PbO

Oxygen 15.43 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbMn³⁺O₂(OH)

Environment:

In iron ore associated with calcite and barite.

IMA Status:

Valid Species (Pre-IMA) 1926

Locality:

Langbanshyttan, Vermland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Percy Dudgeon Quensel (1881-1966), Swidish mineralogist and petrolgist, Stockholm University, Sweden.

Synonym:

ICSD 15234

PDF 23-351

Quenselite Image

Images:

Quenselite

Comments: Square crystal of quenselite on matrix.
Location: Langban, Sweden. Scale: Crystal size 1 mm.
© John Veevaert

Images:

Quenselite

Comments: Jet black tabular crystals of quenselite, some striated on matrix.
Location: Langban, Varmland, Sweden. Scale: Crystal size 1.75mm.
© Tom Loomis / Dakota Matrix

Quenselite Crystallography

Axial Ratios:

a:b:c =0.9876:1:1.6126

Cell Dimensions:

a = 5.61, b = 5.68, c = 9.16, Z = 4; beta = 93.3° V = 291.40 Den(Calc)= 7.09

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 2

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

By Intensity(I/I_o): 3.04(1), 2.72(0.8), 3.68(0.7),

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Crystal Structure:

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Rouse R C , Zeitschrift fur Kristallographie , 134 (1971) p.321-332, The crystal structure of quenselite, Locality: Langban, Sweden

Physical Properties of Quenselite

Cleavage:

[001] Perfect

Color:

Pitch black.

Density:

6.842

Diaphaniety:

Opaque

Fracture:

Flexible - Flexible fragments.

Hardness:

2.5 - Finger Nail

Luster:

Earthy (Dull)

Streak:

dark brownish gray

Optical Properties of Quenselite

Gladstone-Dale:

CI meas= -0.046 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1834,KPDmeas= 0.19,KC= 0.1816

Optical Data:

Biaxial (+), a=2.3

RL Anisotrophism:

Strong.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Quenselite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	28.10	32.60
420 nm	26.70	30.90
440 nm	25.30	29.20
460 nm	24.00	27.70
480 nm	23.00	26.30
500 nm	22.10	25.10
520 nm	21.40	24.20
540 nm	20.80	23.40
560 nm	20.40	22.80
580 nm	20.00	22.20
600 nm	19.70	21.80
620 nm	19.50	21.50
640 nm	19.40	21.30
660 nm	19.20	21.00
680 nm	19.20	20.90
700 nm	19.20	20.90

**Calculated Relative Intensity Colors of Quenselite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	430%
R₁
R₂

Calculated Properties of Quenselite

Electron Density:

r_electron=6.02 gm/cc
note: r_Quenselite=7.09 gm/cc.

Fermion Index

Fermion Index = 0.14724
Boson Index = 0.85276

Photoelectric:

PE_Quenselite=1,209.97 barns/electron
U=PE_Quenselite x r_electron=7,278.86 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Quenselite is Not Radioactive

Quenselite Classification

Dana Class:

6.4.1.2 (6)Hydroxides and Oxides Containing Hydroxyl

(6.4)containing multiple cations

(6.4.1)Dana Group

6.4.1.1 Lithiophorite (Al,Li)MnO2(OH)2 R 3m 3 2/m

6.4.1.2 Quenselite PbMnO2(OH) P 2 2

Strunz Class:

IV/F.14-10 IV - Oxides

IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure

IV/F.14 - Quenselite series

IV/F.14-10 Quenselite PbMnO2(OH) P 2 2

Other Quenselite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Quenselite :
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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Quenselite

PbMn+++O2(OH)
Dana No: 6.4.1.2 Strunz No: IV/F.14-10
Locality:

Notes: