Schultenite Mineral Data
General Schultenite Information
Chemical Formula:
PbHAsO4
Composition:
Molecular Weight = 347.13 gm
Arsenic 21.58 % As 33.11 % As2 O5
Hydrogen 0.29 % H 2.59 % H2 O
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 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 - Prismatic H-M Symbol (2/m) Space Group: P 2/a
X Ray Diffraction:
By Intensity(I/Io ): 3.35(1), 3.13(0.9), 1.95(0.8),
Forms:
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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:
PESchultenite =1,090.96 barns/electronU=PESchultenite x r Electron 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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Schultenite
PbHAsO4
Dana No: 37.01.02.01 Strunz No: 08.AD.30
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Notes:
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