Pollucite Mineral Data

[Minerals for Sale] [New Minerals] [Diamond Crystals] [Gem Minerals] [My Best Minerals]
Classic minerals, out-of-print books & magazines, plus informative articles for collectors

General Pollucite Information

Chemical Formula:

(Cs,Na)2Al2Si4O12•(H2O)

Composition:

Molecular Weight = 285.03 gm

Cesium 27.98 % Cs 29.66 % Cs₂O

Rubidium 1.20 % Rb 1.31 % Rb₂O

Sodium 1.61 % Na 2.17 % Na₂O

Aluminum 8.52 % Al 16.10 % Al₂O₃

Silicon 20.69 % Si 44.27 % SiO₂

Hydrogen 0.71 % H 6.32 % H₂O

Oxygen 39.29 % O

______ ______

100.00 % 99.83 % = TOTAL OXIDE

Empirical Formula:

Cs_0.6Na_0.2Rb_0.04Al_0.9Si_2.1O₆•(H₂O)

Environment:

Lithium-rich granitic pegmatites. Forms a series with analcime.

IMA Status:

Valid Species (Pre-IMA) 1846

Locality:

Elba, Italy Link to MinDat.org Location Data.

Name Origin:

Named after Pollux, a figure from Greek mythology, brother of Castor, for its common association with "castorite" (petalite).

Name Pronunciation:

Pollucite + Pronunciation

Synonym:

ICSD 39895

PDF 25-194

Pollucite Image

Images:

Pollucite

Comments: Isometric crystal of pollucite with clear quartz and sucrosic albite matrix.
Location: Shigar mine, Dossu, Skardu, Pakistan. Scale: 14.6x10x11.5 cm.
© Fabre Minerals

Pollucite Crystallography

Cell Dimensions:

a = 13.682, Z = 16; V = 2,561.23 Den(Calc)= 2.96

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I a3d

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

By Intensity(I/I_o): 2.907(1), 3.421(1), 3.652(0.8),

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

Newnham R E , American Mineralogist , 52 (1967) p.1515-1518, Crystal structure and optical properties of pollucite

View Additional jPOWD Structure files for Pollucite
[1]

Physical Properties of Pollucite

Cleavage:

None

Color:

Colorless, White, Gray, Pale pink, Blue.

Density:

2.9

Diaphaneity:

Transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

6.5 - Pyrite

Luminescence:

Fluorescent, Short UV=cream white blue green, Long UV=weak orange.

Luster:

Vitreous - Dull

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Pollucite

Gladstone-Dale:

CI meas= 0.046 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1757,KPDmeas= 0.1793,KC= 0.188
Ncalc = 1.55 - 1.56

Optical Data:

Isotropic, n=1.52.

Calculated Properties of Pollucite

Electron Density:

Bulk Density (Electron Density)=2.76 gm/cc
note: Specific Gravity of Pollucite =2.90 gm/cc.

Fermion Index:

Fermion Index = 0.0098528604
Boson Index = 0.9901471396

Photoelectric:

PE_Pollucite= 114.28 barns/electron
U=PE_Pollucite x r_electron= 315.74 barns/cc.

Radioactivity:

GRapi = 484.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Pollucite per GRapi unit = 0.21 (%)

Estimated Radioactivity from Pollucite - barely detectable

Pollucite Classification

Dana Class:

77.01.01.02 (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

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 Pollucite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Pollucite :
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 - Scandinavian mineral gallery
16 - WWW-MINCRYST

Search for Pollucite using:

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

Visit our Advertisers for Pollucite :

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

Ask about Pollucite 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 Pollucite Specimen Label here :

Pollucite

(Cs,Na)2Al2Si4O12•(H2O)
Dana No: 77.01.01.02 Strunz No: 09.GB.05
Locality:

Notes: