Schultenite Mineral Data

General Schultenite Information

Chemical Formula:

PbHAsO4

Composition:

Molecular Weight = 347.13 gm

Arsenic 21.58 % As 33.11 % As₂O₅

Hydrogen 0.29 % H 2.59 % H₂O

Lead 59.69 % Pb 64.30 % PbO

Oxygen 18.44 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbH(AsO₄)

Environment:

Secondary mineral in lead arsenic ores. Used as an insecticide as commercially prepared lead arsenate.

IMA Status:

Valid Species (Pre-IMA) 1926

Locality:

Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named for Baron August Benjamin de Schulten (1856-1912) of Helsingfors and Paris, who prepared and described artificial crystals of the compound.

Name Pronunciation:

Schultenite + Pronunciation

Synonym:

ICSD 29552

Lead arsenate

PDF 29-772

Schultenite Image

Images:

Schultenite

Comments: Arrow-shaped crystals of schultenite on matrix.
Location: Gifford Lakes, King County, Washington, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Schultenite Crystallography

Axial Ratios:

a:b:c =0.8641:1:0.7188

Cell Dimensions:

a = 5.827, b = 6.743, c = 4.847, Z = 2; beta = 95.34° V = 189.62 Den(Calc)= 6.08

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a

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

By Intensity(I/I_o): 3.35(1), 3.13(0.9), 1.95(0.8),

Forms:

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Forms: ( 0 1 1) ( 1 2 1) ( 0 1 0) ( 1 4 0) ( 1 1 1) ( 1 3 0) ( 0 0 1)

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Crystal Structure:

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Wilson C C , Cox P J , Stewart N S , Journal of Crystallographic and Spectroscopic Research , 21 (1991) p.589-593, Structure and disorder in schultenite, lead hydrogen arsenate

Physical Properties of Schultenite

Cleavage:

{010} Good

Color:

Colorless, Pale yellow, White.

Density:

5.943

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Adamantine

Streak:

white

Optical Properties of Schultenite

Gladstone-Dale:

CI meas= -0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1522,KPDmeas= 0.1558,KC= 0.148
Ncalc = 1.88 - 1.9

Optical Data:

Biaxial (+), a=1.89, b=1.91, g=1.977, bire=0.0870, 2V(Calc)=60, 2V(Meas)=58.2. Dispersion strong.

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Schultenite

Electron Density:

Bulk Density (Electron Density)=5.18 gm/cc
note: Specific Gravity of Schultenite =6.08 gm/cc.

Fermion Index:

Fermion Index = 0.13
Boson Index = 0.87

Photoelectric:

PE_Schultenite=1,090.96 barns/electron
U=PE_Schultenite x rElectron Density=5,656.08 barns/cc.

Radioactivity:

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

Schultenite Classification

Dana Class:

37.01.02.01 (37)Anhydrous Acid Phosphates, etc

(37.01)with miscellaneous formulae

(37.01.02)Dana Group

37.01.02.01 Schultenite PbHAsO4 P 2/a 2/m

Strunz Class:

08.AD.30 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AD -With only large cations

08.AD.30 Schultenite PbHAsO4 P 2/a 2/m

Other Schultenite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Schultenite :
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
15 - WWW-MINCRYST

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Ask about Schultenite here :
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Print or Cut-and-Paste your Schultenite Specimen Label here :

Schultenite

PbHAsO4
Dana No: 37.01.02.01 Strunz No: 08.AD.30
Locality:

Notes: