Mineralogy Database

Nelenite Mineral Data

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General Nelenite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Fe++)16Si12As+++3O36(OH)17
Help on Composition: Composition: Molecular Weight = 2,312.59 gm
   Magnesium   0.11 %  Mg    0.17 % MgO
   Manganese  22.57 %  Mn   29.14 % MnO
   Zinc        2.83 %  Zn    3.52 % ZnO
   Iron       13.28 %  Fe   17.09 % FeO
   Silicon    14.57 %  Si   31.18 % SiO2
   Arsenic     9.40 %  As   12.40 % As2O3
   Hydrogen    0.72 %  H     6.43 % H2O
   Oxygen     36.53 %  O
             ______        ______ 
             100.00 %       99.93 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+9.5Fe2+5.5ZnMg0.1As2.9Si12O36.3(OH)16.5
Help on Environment: Environment: In a metamorphosed stratiform zinc deposit. Dimorphous with schallerite.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: From Franklin, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Joseph A. Nelen, chemist at the Smithsonian Institution, Washington, D.C., USA.
Help on Name Pronunciation: Name Pronunciation: Nelenite Say NELENITE
Help on Synonym: Synonym: Ferroschallerite
 

Nelenite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:6.37054
Help on Cell Dimensions: Cell Dimensions: a = 13.418, c = 85.48, Z = 12; V = 13,328.18 Den(Calc)= 3.46
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.552(1), 1.677(0.6), 1.723(0.5),
 

Physical Properties of Nelenite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Brown.
Help on Density: Density: 3.46
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: light brown
 

Optical Properties of Nelenite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): light brown.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2049,KPDmeas= 0.2049,KC= 0.2113
Ncalc = 1.73
Help on Optical Data: Optical Data: Uniaxial (-), e=1.7, w=1.718, bire=0.0180.
 

Calculated Properties of Nelenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.33 gm/cc
note: Specific Gravity of Nelenite =3.46 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENelenite = 18.09 barns/electron
U=PENelenite x rElectron Density= 60.31 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nelenite is Not Radioactive
 

Nelenite Classification

Help on  Dana Class: Dana Class: 72.04.01b.03 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
  (72.04)with 4-, 6-, and 12-membered rings
  (72.04.01b)Pyrosmalite group (Friedelite subgroup)
 
72.04.01b.01 Friedelite Mn8Si6O15(OH,Cl)10 C 2/m 2/m
 
72.04.01b.02 Mcgillite (Mn,Fe)8Si6O15(OH)8Cl2 C 2/m 2/m
 
72.04.01b.03 Nelenite (Mn,Fe)16Si12As3O36(OH)17 R 3m 3 2/m
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 Nelenite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Nelenite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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

Nelenite

(Mn,Fe++)16Si12As+++3O36(OH)17
Dana No: 72.04.01b.03 Strunz No: 09.EE.15
Locality:

 

Notes:

 

 
   
 


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