Schallerite Mineral Data + Say SCHALLERITE

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.
 

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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 PyramidalH-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 Diaphaniety: Diaphaniety: 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
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:

relectron=3.24 gm/cc
note: rSchallerite =3.37 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.007
Boson Index = 0.993
Help on Photoelectric: Photoelectric:

PESchallerite = 16.95 barns/electron
U=PESchallerite x relectron= 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: 72.4.1a.3 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
  (72.4)with 4-, 6-, and 12-membered rings
  (72.4.1a)Pyrosmalite group (Pyrosmalite subgroup)
 
72.4.1a.1 Ferropyrosmalite (Fe,Mn)8Si6O15(OH,Cl)10 P 3m1 3 2/m
 
72.4.1a.2 Manganpyrosmalite (Mn,Fe)8Si6O15(OH,Cl)10 P 3m1 3 2/m
 
72.4.1a.3 Schallerite Mn16[AsO2OH][Si12O30](OH)14 P 3m1 ? 3m
Help on Strunz Class: Strunz Class: VIII/H.28-50 VIII - Silicates
  VIII/H - Phyllosilicates (layered) Mica minerals with other simple layers, [Si6O15]6- and others
  VIII/H.28 - Pyrosmalite series
 
VIII/H.28-10 Ferropyrosmalite (Fe,Mn)8Si6O15(OH,Cl)10 P 3m1 3 2/m
 
VIII/H.28-20 Manganpyrosmalite (Mn,Fe)8Si6O15(OH,Cl)10 P 3m1 3 2/m
 
VIII/H.28-30 Brokenhillite* (Mn,Fe)32[Si24O60]OH29Cl11 P 63mc 6mm
 
VIII/H.28-40 Nelenite (Mn,Fe)16Si12As3O36(OH)17 R 3m 3 2/m
 
VIII/H.28-50 Schallerite Mn16[AsO2OH][Si12O30](OH)14 P 3m1 ? 3m
 
VIII/H.28-70 Friedelite Mn8Si6O15(OH,Cl)10 C 2/m 2/m
 
VIII/H.28-80 Mcgillite (Mn,Fe)8Si6O15(OH)8Cl2 C 2/m 2/m
 
VIII/H.28-90 Bementite Mn8Si6O15(OH)10 P 21/c 2/m
 
VIII/H.28-100 Varennesite Na8Mn2Si10O25(OH,Cl)2·12(H2O) C mcm 2/m 2/m 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 - Franklin Minerals(Dunn) 5 - Franklin Minerals(Palache) 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (MinSocAm) 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 -École des Mines de Paris

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Print or Cut-and-Paste your Schallerite Specimen Label here :

Schallerite

Mn++16[As+++O2OH][Si12O30](OH)14
Dana No: 72.4.1a.3 Strunz No: VIII/H.28-50
Locality:

 

Notes:

 
 
   
 
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