Nekoite Mineral Data

Nekoite Mineral Data
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General Nekoite Information

Help on Chemical Formula: Chemical Formula: Ca3Si6O15•7(H2O)
Help on Composition: Composition: Molecular Weight = 654.84 gm
   Calcium   18.36 %  Ca   25.69 % CaO
   Silicon   25.73 %  Si   55.05 % SiO2
   Hydrogen   2.15 %  H    19.26 % H2O
   Oxygen    53.75 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Si6O15•7(H2O)
Help on Environment: Environment: Metamorphosed limestone.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Crestmore quarry, 5 miles NW of Riverside, Riverside Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named by reversing the order for okenite (Lorenz Oken (1779-1851), German natural historian, Munich Germany) because the minerals were so similer.
Help on Name Pronunciation: Name Pronunciation: Nekoite Say NEKOITE
Help on Synonym: Synonym: ICSD 100436
  PDF 31-303
 

Nekoite Image

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Nekoite

Comments: Sprays of translucent acicular nekoite crystals.
Location: Iron Cap Mine, Graham County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Nekoite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.7748:1:0.7494
Help on Cell Dimensions: Cell Dimensions: a = 7.588, b = 9.793, c = 7.339, Z = 1; alpha = 111.77°, beta = 103.5°, gamma = 86.53° V = 491.56 Den(Calc)= 2.21
Help on Crystal System: Crystal System: Triclinic - PedialH-M Symbol (1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.1(1), 3.319(0.9), 6.64(0.65),
Click Here for Large Nekoite Structure Window Crystal Structure:

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Alberti A , Galli E , American Mineralogist , 65 (1980) p.1270-1276, The structure of nekoite, Ca3Si6O15*7H2O, a new type of sheet silicate

 

Physical Properties of Nekoite

Help on Cleavage: Cleavage: {100} Distinct
Help on Color: Color: Pearl white.
Help on Density: Density: 2.23
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Nekoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2421,KPDmeas= 0.2399,KC= 0.2339
Ncalc = 1.52
Help on Optical Data: Optical Data: Biaxial (+), b=1.535, 2V(Meas)=70.
 

Calculated Properties of Nekoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.27 gm/cc
note: Specific Gravity of Nekoite =2.23 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENekoite = 3.24 barns/electron
U=PENekoite x rElectron Density= 7.38 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nekoite is Not Radioactive
 

Nekoite Classification
Help on Dana Class: Dana Class: 72.03.02.07 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
  (72.03)with 3-, 4-, or 5-membered rings and 8-membered rings
  (72.03.02)Tobermorite group (5- & 8-membered rings)
 
72.03.02.01 Tobermorite Ca5Si6O16(OH)2•4(H2O) C 2221 2 2 2
 
72.03.02.02 Clinotobermorite Ca5Si6(O,OH)18•5(H2O) Cc,C 2/c Mono
 
72.03.02.03 Plombierite Ca5H2Si6O18•6H2O B11b 2
 
72.03.02.04 Riversideite Ca5Si6O16(OH)2•2(H2O) B2212 2 2 2
 
72.03.02.05 Okenite Ca3[Si6O15]•6(H2O) P1 or P1 Tri
 
72.03.02.06 Tacharanite Ca12Al2Si18O33(OH)36 A centered Mono
 
72.03.02.07 Nekoite Ca3Si6O15•7(H2O) P1 1
 
72.03.02.08 Oyelite Ca10B2Si8O29•12(H2O) B**** Ortho
Help on Strunz Class: Strunz Class: 09.EA.45 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
 
09.EA.45 Nekoite Ca3Si6O15•7(H2O) P1 1
 

Other Nekoite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Nekoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Nekoite here :
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Print or Cut-and-Paste your Nekoite Specimen Label here :

Nekoite

Ca3Si6O15•7(H2O)
Dana No: 72.03.02.07 Strunz No: 09.EA.45
Locality:

 

Notes: