Mineralogy Database

Schallerite Mineral Data

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General Schallerite Information

Help on Chemical  Formula: Chemical Formula: Mn++16[As+++O2OH][Si12O30](OH)14
Help on Composition: Composition: Molecular Weight = 2,305.90 gm
   Manganese  38.12 %  Mn   49.22 % MnO
   Silicon    14.62 %  Si   31.27 % SiO2
   Arsenic     9.75 %  As   12.87 % As2O3
   Hydrogen    0.74 %  H     6.64 % H2O
   Oxygen     36.77 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+16As3Si12O36(OH)17
Help on Environment: Environment: Metamorphosed zinc deposit. Dimorphous with nelenite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1925
Help on Locality: Locality: 700 ft level, Franklin mine, Franklin, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Wakdemar Theodore Shaller ((1852-1967), mineralogist, U. S. Geological Survey.
Help on Name Pronunciation: Name Pronunciation: Schallerite + Pronunciation Say SCHALLERITE

Schallerite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.06567
Help on Cell Dimensions: Cell Dimensions: a = 13.4, c = 14.28, Z = 2; V = 2,220.59 Den(Calc)= 3.45
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 3m1 ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.688(1), 1.511(0.6), 2.673(0.6),

Physical Properties of Schallerite

Help on Cleavage: Cleavage: {0001} Good
Help on Color: Color: Light brown, Reddish brown.
Help on Density: Density: 3.37
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Waxy
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: light brown

Optical Properties of Schallerite

Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Uniaxial (-), e=1.679, w=1.704, bire=0.0250.

Calculated Properties of Schallerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.24 gm/cc
note: Specific Gravity of Schallerite =3.37 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0070032047
Boson Index = 0.9929967953
Help on Photoelectric: Photoelectric: PESchallerite = 16.95 barns/electron
U=PESchallerite x rElectron Density= 54.89 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schallerite is Not Radioactive

Schallerite Classification

Help on  Dana Class: Dana Class: 72.04.01a.03 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
  (72.04)with 4-, 6-, and 12-membered rings
  (72.04.01a)Pyrosmalite group (Pyrosmalite subgroup)
72.04.01a.01 Pyrosmalite-(Fe) (Fe,Mn)8Si6O15(OH,Cl)10 P 3m1 3 2/m
72.04.01a.02 Pyrosmalite-(Mn) (Mn,Fe)8Si6O15(OH,Cl)10 P 3m1 3 2/m
72.04.01a.03 Schallerite Mn16[AsO2OH][Si12O30](OH)14 P 3m1 ? 3m
Help on  Strunz Class: Strunz Class: 09.EE.15 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EE -Single tetrahedral nets of 6-membered rings
09.EE.15 Schallerite Mn16[AsO2OH][Si12O30](OH)14 P 3m1 ? 3m
09.EE.15 Nelenite (Mn,Fe)16Si12As3O36(OH)17 R 3m 3 2/m

Other Schallerite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)
Help on See Also: 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

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Dana No: 72.04.01a.03 Strunz No: 09.EE.15





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