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Willhendersonite Mineral Data

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General Willhendersonite Information

Help on Chemical  Formula: Chemical Formula: KCaAl3Si3O12•5(H2O)
Help on Composition: Composition: Molecular Weight = 526.45 gm
   Potassium   7.43 %  K     8.95 % K2O
   Calcium     7.61 %  Ca   10.65 % CaO
   Aluminum   15.38 %  Al   29.05 % Al2O3
   Silicon    16.00 %  Si   34.24 % SiO2
   Hydrogen    1.91 %  H    17.11 % H2O
   Oxygen     51.67 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KCaAl3Si3O12•5(H2O)
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: San Venanzo quarry, Terni, Umbria, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after William A. Henderson, of Stamford, Connecticut, U.S.A., who noted this as an unusual mineral and provided it for study.
Help on Name Pronunciation: Name Pronunciation: Willhendersonite + Pronunciation Say WILLHENDERSONITE
Help on Synonym: Synonym: ICSD 30873
  PDF 35-643
 

Willhendersonite Image

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  Willhendersonite

Comments: Colorless tabular willhendersonite crystals forming a spherical aggregate.
Location: San Venzano Quarry, Terni, Umbria, central Italy. Scale: See Image.
© Rruff Database

Willhendersonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9989:1:1.0308
Help on Cell Dimensions: Cell Dimensions: a = 9.206, b = 9.216, c = 9.5, Z = 2; alpha = 92.34°, beta = 92.7°, gamma = 90.12° V = 804.44 Den(Calc)= 2.17
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.16(1), 2.907(0.6), 2.804(0.5),
 

Physical Properties of Willhendersonite

Help on Cleavage: Cleavage: {100} Perfect, {010} Perfect, {001} Perfect
Help on Color: Color: Colorless.
Help on Density: Density: 2.18
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Willhendersonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.026 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2355,KPDmeas= 0.2344,KC= 0.2294
Ncalc = 1.5
Help on Optical Data: Optical Data: Biaxial (?), a=1.505, b=1.511, g=1.517, bire=0.0120, 2V(Calc)=88, 2V(Meas)=87.
 

Calculated Properties of Willhendersonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.20 gm/cc
note: Specific Gravity of Willhendersonite =2.18 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.007836773
Boson Index = 0.992163227
Help on Photoelectric: Photoelectric: PEWillhendersonite = 2.75 barns/electron
U=PEWillhendersonite x relectron= 6.07 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 108.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Willhendersonite per GRapi unit = 0.92 (%)

Estimated Radioactivity from Willhendersonite - barely detectable

 

Willhendersonite Classification

Help on  Dana Class: Dana Class: 77.01.02.03 (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.02)Chabazite and related species
 
77.01.02.01 Chabazite-Ca (Ca0.5,Na,K)4[Al4Si8O24]•12H2O P1 1
 
77.01.02.01a Chabazite-Na! (Na2,K2,Ca,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m
 
77.01.02.01b Chabazite-K! (K2,Ca,Na2,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m
 
77.01.02.01c Chabazite-Sr! (Sr,Ca,K2,Na2)[Al2Si4O12]•6(H2O) R 3m 3 2/m
 
77.01.02.02 Herschelite? (Na,Ca,K)AlSi2O6•3(H2O) R 3m 3 2/m
 
77.01.02.03 Willhendersonite KCaAl3Si3O12•5(H2O) P1 1
 
77.01.02.04 Offretite (K2,Ca,Mg)2.5Al5Si13O36•15(H2O) P 6m2 6 m2
 
77.01.02.05 Erionite-Na (Na2,K2,Ca)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.05a Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.05b Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.06 Gmelinite-Na (Na2,Ca)Al2Si4O12•6(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.06a Gmelinite-Ca! (Ca,Na2)Al2Si4O12•6(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.06b Gmelinite-K! (K,Na,Ca)6(Al7Si17O48)•22(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.07 Faujasite-Na (Na2,Ca,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m
 
77.01.02.07a Faujasite-Ca! (Ca,Na2,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m
 
77.01.02.07b Faujasite-Mg! (Mg,Na2,Ca)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m
 
77.01.02.08 Levyne-Ca (Ca,Na2,K2)Al2Si4O12•6(H2O) R 3m 3 2/m
 
77.01.02.08a Levyne-Na! (Na2,Ca,K2)Al2Si4O12•6(H2O) R 3m 3 2/m
 
77.01.02.09 Tschortnerite! Ca4(Ca,Sr,K,Ba)3Cu3(OH)8[Si12Al12O48]•x(H2O),x>=20 F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 09.GD.10 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GD -Chains of 6-membered rings � tabular zeolites
 
09.GD.10 Chabazite-K! (K2,Ca,Na2,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m
 
09.GD.10 Chabazite-Ca (Ca0.5,Na,K)4[Al4Si8O24]•12H2O P1 1
 
09.GD.10 Chabazite-Na! (Na2,K2,Ca,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m
 
09.GD.10 Herschelite? (Na,Ca,K)AlSi2O6•3(H2O) R 3m 3 2/m
 
09.GD.10 Chabazite-Sr! (Sr,Ca,K2,Na2)[Al2Si4O12]•6(H2O) R 3m 3 2/m
 
09.GD.10 Willhendersonite KCaAl3Si3O12•5(H2O) P1 1
 

Other Willhendersonite 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 Willhendersonite :
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

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

Willhendersonite

KCaAl3Si3O12•5(H2O)
Dana No: 77.01.02.03 Strunz No: 09.GD.10
Locality:

 

Notes:

 

 
   
 


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