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Wairakite Mineral Data

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General Wairakite Information

Help on Chemical  Formula: Chemical Formula: CaAl2Si4O12•2(H2O)
Help on Composition: Composition: Molecular Weight = 434.41 gm
   Calcium    9.23 %  Ca   12.91 % CaO
   Aluminum  12.42 %  Al   23.47 % Al2O3
   Silicon   25.86 %  Si   55.33 % SiO2
   Hydrogen   0.93 %  H     8.29 % H2O
   Oxygen    51.56 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl2Si4O12•2(H2O)
Help on Environment: Environment: Possibly forms a continuous solid-solution series with analcime.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: Locality: Wairakei, Taupo Volcanic Zone, New Zealand. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the loclity.
Help on Name Pronunciation: Name Pronunciation: Wairakite + Pronunciation Say WAIRAKITE
Help on Synonym: Synonym: ICSD 100553
  PDF 42-1451
 

Wairakite Image

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  Dmisteinbergite   Wairakite

Comments: Pearly platy crystalline dmisteinbergite with dull white wairakite on matrix.
Location: Kurumazawa, Katashina, Gumma, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Wairakite

Comments: White nearly opaque crystalline massive wairakite, with a few crystals faces present.
Location: Tohi Mine, Shizuoka, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wairakite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0035:1:0.9939
Help on Cell Dimensions: Cell Dimensions: a = 13.692, b = 13.643, c = 13.56, Z = 8; beta = 90.5° V = 2,532.91 Den(Calc)= 2.28
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.41(1), 5.57(0.9), 2.9(0.8),
 

Physical Properties of Wairakite

Help on Cleavage: Cleavage: {100} Distinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.26
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white
 

Optical Properties of Wairakite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2193,KPDmeas= 0.2212,KC= 0.219
Ncalc = 1.49 - 1.5
Help on Optical Data: Optical Data: Biaxial (+/-), a=1.498, g=1.502, bire=0.0040, 2V(Meas)=70-105.
 

Calculated Properties of Wairakite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Wairakite =2.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEWairakite = 2.50 barns/electron
U=PEWairakite x rElectron Density= 5.72 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wairakite is Not Radioactive
 

Wairakite Classification

Help on  Dana Class: Dana Class: 77.01.01.03 (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.01)Analcime and related species
 
77.01.01.01 Analcime NaAlSi2O6•(H2O) P1 1
 
77.01.01.02 Pollucite (Cs,Na)2Al2Si4O12•(H2O) I a3d 4/m 3 2/m
 
77.01.01.03 Wairakite CaAl2Si4O12•2(H2O) I2/a 2/m
 
77.01.01.04 Laumontite CaAl2Si4O12•4(H2O) C 2/m 2/m
 
77.01.01.05 Hsianghualite Ca3Li2Be3(SiO4)3F2 I 213 2 3
Help on  Strunz Class: Strunz Class: 09.GB.05 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GB -Chains of single connected 4-membered rings
 
09.GB.05 Ammonioleucite (NH4,K)AlSi2O6 I 41/a 4/m
 
09.GB.05 Analcime NaAlSi2O6•(H2O) P1 1
 
09.GB.05 Hsianghualite Ca3Li2Be3(SiO4)3F2 I 213 2 3
 
09.GB.05 Lithosite K6Al4Si8O25•(H2O) P 21 (pseudo ORTH) 2
 
09.GB.05 Leucite KAlSi2O6 I 41/a 4/m
 
09.GB.05 Pollucite (Cs,Na)2Al2Si4O12•(H2O) I a3d 4/m 3 2/m
 
09.GB.05 Wairakite CaAl2Si4O12•2(H2O) I2/a 2/m
 

Other Wairakite Information

Help on References: References: NAME( CanMin, v 35, p 1591) 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 Wairakite :
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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Wairakite

CaAl2Si4O12•2(H2O)
Dana No: 77.01.01.03 Strunz No: 09.GB.05
Locality:

 

Notes:

 

 
   
 


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