Willhendersonite Mineral Data

General Willhendersonite Information

Chemical Formula:

KCaAl3Si3O12•5(H2O)

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

Empirical Formula:

KCaAl₃Si₃O₁₂•5(H₂O)

IMA Status:

Approved IMA 1984

Locality:

San Venanzo quarry, Terni, Umbria, Italy. Link to MinDat.org Location Data.

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.

Name Pronunciation:

Willhendersonite + Pronunciation

Synonym:

ICSD 30873

PDF 35-643

Willhendersonite Image

Images:

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

Axial Ratios:

a:b:c =0.9989:1:1.0308

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

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 9.16(1), 2.907(0.6), 2.804(0.5),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Tillmanns E , Fischer R X , Baur W H , Neues Jahrbuch fur Mineralogie, Monatshefte , 1984 (1984) p.547-558, Chabazite-type framework in the new zeolite willhendersonite,, KCaAl3O12*5H2O

Physical Properties of Willhendersonite

Cleavage:

{100} Perfect, {010} Perfect, {001} Perfect

Color:

Colorless.

Density:

2.18

Diaphaneity:

Transparent

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Willhendersonite

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

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

Electron Density:

Bulk Density (Electron Density)=2.20 gm/cc
note: Specific Gravity of Willhendersonite =2.18 gm/cc.

Fermion Index:

Fermion Index = 0.007836773
Boson Index = 0.992163227

Photoelectric:

PE_{Willhendersonite}= 2.75 barns/electron
U=PE_{Willhendersonite} x r_electron= 6.07 barns/cc.

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

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

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

References:

NAME( CanMin, v 35, p 1591) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Search for Willhendersonite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Willhendersonite :

A Bijoux Google Search for Willhendersonite
Adam's Minerals Google Search for Willhendersonite
Cape Minerals Google Search for Willhendersonite
Dakota Matrix Minerals Google Search for Willhendersonite
Excalibur Mineral Corp. Google Search for Willhendersonite
Exceptional Minerals Google Search for Willhendersonite
John Betts Fine Minerals Search for Willhendersonite
McDougall Minerals Google Search for Willhendersonite
Mineral News Website Link
Rock and Mineral Shows Google Search for Willhendersonite
Weinrich Minerals, Inc. Google Search for Willhendersonite

Ask about Willhendersonite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: