Nepouite Mineral Data

Nepouite Mineral Data
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General Nepouite Information

Help on Chemical Formula: Chemical Formula: Ni3Si2O5(OH)4
Help on Composition: Composition: Molecular Weight = 380.27 gm
   Silicon   14.77 %  Si   31.60 % SiO2
   Nickel    46.30 %  Ni   58.92 % NiO
   Hydrogen   1.06 %  H     9.48 % H2O
   Oxygen    37.87 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ni3Si2O5(OH)4
Help on Environment: Environment: Nickel-bearing laterite deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1906
Help on Locality: Locality: Reis II mine, Nepoui, New Caledonia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Nepouite Say NEPOUITE
Help on Synonym: Synonym: Genthite
 

Nepouite Image

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Nepouite

Comments: Massive, green népouite.
Location: Callenberg North (no. 2) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Specimen size 4 cm.
© Thomas Witzke / Abraxas-Verlag

Nepouite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5771:1:0.7902
Help on Cell Dimensions: Cell Dimensions: a = 5.31, b = 9.2, c = 7.27, Z = 2; V = 355.15 Den(Calc)= 3.56
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Ccm21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.31(1), 3.63(0.9), 2.501(0.7),1.53(0.6), 2.894(0.6), 4.55(0.5), 2.321(0.4),
 

Physical Properties of Nepouite

Help on Cleavage: Cleavage: {001} Good, {010} Good
Help on Color: Color: Pale green, Deep green.
Help on Density: Density: 2.5 - 3.2, Average = 2.85
Help on Diaphaneity: Diaphaneity: Translucent to subtranslucent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: greenish white
 

Optical Properties of Nepouite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.094 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.124 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1766,KPDmeas= 0.2206,KC= 0.2017
Ncalc = 1.5 - 1.72
Help on Optical Data: Optical Data: Biaxial (-), a=1.6-1.63, g=1.635-1.65, bire=0.0200-0.0350, 2V(Meas)=0-10.
Help on Pleochroism (z): Pleochroism (z): yellow green.
 

Calculated Properties of Nepouite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.82 gm/cc
note: Specific Gravity of Nepouite =2.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENepouite = 18.77 barns/electron
U=PENepouite x rElectron Density= 52.91 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nepouite is Not Radioactive
 

Nepouite Classification
Help on Dana Class: Dana Class: 71.01.02b.03 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.01)with 1:1 layers
  (71.01.02b)Serpentine group (Lizardite subgroup)
 
71.01.02b.01 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono
 
71.01.02b.02 Lizardite Mg3Si2O5(OH)4 P1 1
 
71.01.02b.03 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2
 
71.01.02b.04 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono
Help on Strunz Class: Strunz Class: 09.ED.15 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.ED -Phyllosilicates with kaolinite layers
 
09.ED.15 Clinochrysotile? Mg3Si2O5(OH)4 Cc, C 2/m Mono
 
09.ED.15 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m
 
09.ED.15 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2
 
09.ED.15 Amesite Mg2Al(SiAl)O5(OH)4 C1 1
 
09.ED.15 Antigorite (Mg,Fe)3Si2O5(OH)4 Cm m
 
09.ED.15 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono
 
09.ED.15 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m
 
09.ED.15 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 31m 3m
 
09.ED.15 Chrysotile Mg3Si2O5(OH)4 A2/m 2/m
 
09.ED.15 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2
 
09.ED.15 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono
 
09.ED.15 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 63 6
 
09.ED.15 Maufite? (Mg,Ni)Al4Si3O13•4(H2O)(?) Mono ? Mono
 
09.ED.15 Lizardite Mg3Si2O5(OH)4 P1 1
 
09.ED.15 Orthochrysotile? Mg3Si2O5(OH)4 Unk Ortho
 
09.ED.15 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1
 
09.ED.15 Pecoraite Ni3Si2O5(OH)4 C 2/m 2/m
 
09.ED.15 Parachrysotile? Mg3Si2O5(OH)4 Unk Ortho
 

Other Nepouite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Nepouite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineral and Gemstone Kingdom
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info

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

Nepouite

Ni3Si2O5(OH)4
Dana No: 71.01.02b.03 Strunz No: 09.ED.15
Locality:

 

Notes: