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Scrutinyite Mineral Data
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General Scrutinyite Information
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 Chemical Formula: |
PbO2 |
| Composition: |
Molecular Weight = 239.20 gm |
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Lead 86.62 % Pb 100.00 % PbO2 |
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Oxygen 13.38 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
PbO2 |
| Environment: |
Oxidized portions of Pb bearing deposits closely associated with plattnerite. |
| IMA Status: |
Approved IMA 1988 |
| Locality: |
Sunshine #1 mine, Hansonburg district, Socorro County, New Mexico. Link to MinDat.org Location Data. |
| Name Origin: |
The name alludes to the close scrutiny that is necessary to distinguish the mineral from its dimorph, plattnerite. |
| Name Pronunciation: |
Scrutinyite + Pronunciation  |
| Synonym: |
ICSD 20362 |
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PDF 45-1416 |
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Scrutinyite Image |
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Images:
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Scrutinyite
Comments: Acicular crystals of scrutinyite.
Location: Hilarion Mine, Agios Konstantinos, Lavrion District, Attikà Prefecture, Greece.
Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag |
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Scrutinyite Crystallography
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| Axial Ratios: |
a:b:c =0.8346:1:0.913 |
| Cell Dimensions: |
a = 4.971, b = 5.956, c = 5.438, Z = 4; V = 161.00 Den(Calc)= 9.87 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bcn |
| X Ray Diffraction: |
By Intensity(I/Io): 3.117(1), 1.84(0.8), 2.722(0.5), |
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Physical Properties of Scrutinyite
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| Cleavage: |
{100} Perfect, {010} Imperfect |
| Color: |
Dark reddish brown. |
| Diaphaneity: |
Transparent to translucent |
| Habit: |
Crystalline - Fine - Occurs as well-formed fine sized crystals. |
| Habit: |
Platy - Sheet forms (e.g. micas). |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Sub Metallic |
| Streak: |
dark brown |
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Optical Properties of Scrutinyite
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| Optical Data: |
NCalc= 2.04 - from Gladstone-Dale relationship (KC = 0.105) where Ncalc=Dcalc*KC+1
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| RL Anisotrophism: |
Weak, pale blue. |
| RL Bireflectance: |
Very weak, gray-white to bluish gray. |
| RL Color: |
Gray-white with reddish brown internal reflections. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Scrutinyite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 546 nm |
17.90 |
18.80 |
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| 589 nm |
17.00 |
17.90 |
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Calculated Relative Intensity Colors of Scrutinyite in Air
Relative
Intensity |
0% |
60% |
100% |
120% |
180% |
240% |
300% |
360% |
420% |
480% |
510% |
| R1 |
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| R2 |
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Calculated Properties of Scrutinyite
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| Electron Density: |
Bulk Density (Electron Density)=8.09 gm/cc
note: Specific Gravity of Scrutinyite =9.87 gm/cc.
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| Fermion Index: |
Fermion Index = 0.19
Boson Index = 0.81 |
| Photoelectric: |
PEScrutinyite =1,622.85 barns/electron
U=PEScrutinyite x rElectron Density=13124.76 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Scrutinyite is Not Radioactive |
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Scrutinyite Classification
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| Dana Class: |
04.04.06.02 (04)Simple Oxides |
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(04.04)with a cation charge of 4+ (A++++ O2) |
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(04.04.06)Dana Group |
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04.04.06.01 Tellurite TeO2 P bca 2/m 2/m 2/m |
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04.04.06.02 Scrutinyite PbO2 P bcn 2/m 2/m 2/m |
| Strunz Class: |
04.DB.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DB -With medium-sized cations; chains of edge-sharing octahedra |
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04.DB.20 Scrutinyite PbO2 P bcn 2/m 2/m 2/m |
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Other Scrutinyite Information
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| References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.75,p709,1990) OPTIC PROP.(AntBidBlaNic3) |
| See Also: |
Links to other databases for Scrutinyite :
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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Scrutinyite
PbO2
Dana No: 04.04.06.02 Strunz No: 04.DB.20
Locality:
Notes:
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