Nekoite Mineral Data
General Nekoite Information
Chemical Formula:
Ca3Si6O15•7(H2O)
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 % H2 O
Oxygen 53.75 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ca3 Si6 O15 •7(H2 O)
Environment:
Metamorphosed limestone.
IMA Status:
Valid Species (Pre-IMA) 1956
Locality:
Crestmore quarry, 5 miles NW of Riverside, Riverside Co., California. Link to MinDat.org Location Data.
Name Origin:
Named by reversing the order for okenite (Lorenz Oken (1779-1851), German natural historian, Munich Germany) because the minerals were so similer.
Name Pronunciation:
Nekoite
Synonym:
ICSD 100436
PDF 31-303
Nekoite Image
Images:
Nekoite Crystallography
Axial Ratios:
a:b:c =0.7748:1:0.7494
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
Crystal System:
Triclinic - Pedial H-M Symbol (1) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io ): 9.1(1), 3.319(0.9), 6.64(0.65),
Physical Properties of Nekoite
Cleavage:
{100} Distinct
Color:
Pearl white.
Density:
2.23
Luster:
Pearly
Streak:
white
Optical Properties of Nekoite
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
Optical Data:
Biaxial (+), b=1.535, 2V(Meas)=70.
Calculated Properties of Nekoite
Electron Density:
Bulk Density (Electron Density)=2.27 gm/cc note: Specific Gravity of Nekoite =2.23 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PENekoite = 3.24 barns/electronU=PENekoite x r Electron Density= 7.38 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Nekoite is Not Radioactive
Nekoite Classification
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
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
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
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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Nekoite
Ca3Si6O15•7(H2O)
Dana No: 72.03.02.07 Strunz No: 09.EA.45
Locality:
Notes:
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