General Schallerite Information Chemical Formula: |
Mn++16[As+++O2OH][Si12O30](OH)14 |
Composition: |
Molecular Weight = 2,305.90 gm |
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Manganese 38.12 % Mn 49.22 % MnO |
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Silicon 14.62 % Si 31.27 % SiO2 |
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Arsenic 9.75 % As 12.87 % As2O3 |
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Hydrogen 0.74 % H 6.64 % H2O |
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Oxygen 36.77 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Mn2+16As3Si12O36(OH)17 |
Environment: |
Metamorphosed zinc deposit. Dimorphous with nelenite. |
IMA Status: |
Valid Species (Pre-IMA) 1925 |
Locality: |
700 ft level, Franklin mine, Franklin, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data. |
Name Origin: |
Named for Wakdemar Theodore Shaller ((1852-1967), mineralogist, U. S. Geological Survey. |
Name Pronunciation: |
Schallerite + Pronunciation |
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Images:
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| | Schallerite Crystallography Axial Ratios: |
a:c = 1:1.06567 |
Cell Dimensions: |
a = 13.4, c = 14.28, Z = 2; V = 2,220.59 Den(Calc)= 3.45 |
Crystal System: |
Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: P 3m1 ? |
X Ray Diffraction: |
By Intensity(I/Io): 1.688(1), 1.511(0.6), 2.673(0.6), |
Crystal Structure:
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Mouse
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| Physical Properties of Schallerite Cleavage: |
{0001} Good |
Color: |
Light brown, Reddish brown. |
Density: |
3.37 |
Diaphaneity: |
Translucent |
Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
Hardness: |
4.5-5 - Near Apatite |
Luminescence: |
Non-fluorescent. |
Luster: |
Vitreous - Waxy |
Magnetism: |
Nonmagnetic |
Streak: |
light brown |
| Optical Properties of Schallerite Gladstone-Dale: |
CI meas= 0.045 (Good) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.067 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2004,KPDmeas= 0.2052,KC= 0.2148 Ncalc = 1.72 - 1.74 Optical Data: |
Uniaxial (-), e=1.679, w=1.704, bire=0.0250. |
| Calculated Properties of Schallerite Electron Density: |
Bulk Density (Electron Density)=3.24 gm/cc |
note: Specific Gravity of Schallerite =3.37 gm/cc. Fermion Index: |
Fermion Index = 0.0070032047 |
Boson Index = 0.9929967953 Photoelectric: |
PESchallerite = 16.95 barns/electron |
U=PESchallerite x rElectron Density= 54.89 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Schallerite is Not Radioactive | Schallerite Classification Dana Class: |
72.04.01a.03 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings |
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(72.04)with 4-, 6-, and 12-membered rings |
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(72.04.01a)Pyrosmalite group (Pyrosmalite subgroup) |
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Strunz Class: |
09.EE.15 09 - SILICATES (Germanates) |
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09.E - Phyllosilicates |
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09.EE -Single tetrahedral nets of 6-membered rings |
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| Other Schallerite Information References: |
NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32) |
See Also: |
Links to other databases for Schallerite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Franklin Minerals(Dunn) 6 - Franklin Minerals(Palache) 7 - GeoScienceWorld 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - MinDAT 13 - Mineralienatlas (Deutsch) 14 - Online Mineral Museum 15 - QUT Mineral Atlas 16 - Ruff.Info Search for Schallerite using: Visit our Advertisers for Schallerite : A Bijoux Google Search for SchalleriteAdam's Minerals Google Search for Schallerite Cape Minerals Google Search for Schallerite Dakota Matrix Minerals Google Search for Schallerite Excalibur Mineral Corp. Google Search for Schallerite Exceptional Minerals Google Search for Schallerite John Betts Fine Minerals Search for Schallerite McDougall Minerals Google Search for Schallerite Mineral News Website Link Rock and Mineral Shows Google Search for Schallerite Weinrich Minerals, Inc. Google Search for Schallerite Ask about Schallerite here : Print or Cut-and-Paste your Schallerite Specimen Label here :
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