Pollucite Mineral Data (original) (raw)

General Pollucite Information

Help on Chemical Formula: Chemical Formula:

(Cs,Na)2Al2Si4O12•(H2O)

Help on Composition: 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

Help on Empirical Formula: Empirical Formula:

Cs0.6Na0.2Rb0.04Al0.9Si2.1O6•(H2O)

Help on Environment: Environment:

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

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1846

Help on Locality: Locality:

Elba, Italy Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

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

Help on Name Pronunciation: Name Pronunciation:

Pollucite + Pronunciation Say POLLUCITE

Help on Synonym: Synonym:

ICSD 39895

PDF 25-194

Pollucite Image

Click Here for Larger Pollucite Image in a New Browser Window Images:

Click Here for Larger Pollucite Image 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

Help on Cell Dimensions: Cell Dimensions:

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

Help on Crystal System: 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/Io): 2.907(1), 3.421(1), 3.652(0.8),

Click Here for Large Pollucite Structure Window Crystal Structure:

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| | 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

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Colorless, White, Gray, Pale pink, Blue.

Help on Density: Density:

2.9

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Help on Habit: Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Help on Hardness: Hardness:

6.5 - Pyrite

Help on Luminescence: Luminescence:

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

Help on Luster: Luster:

Vitreous - Dull

Help on Magnetism: Magnetism:

Nonmagnetic

Help on Streak: Streak:

white

Optical Properties of Pollucite

Help on Gladstone-Dale: 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

Help on Optical Data: Optical Data:

Isotropic, n=1.52.

Calculated Properties of Pollucite

Help on Electron Density: Electron Density:

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

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0098528604
Boson Index = 0.9901471396

Help on Photoelectric: Photoelectric:

PEPollucite = 114.28 barns/electron
U=PEPollucite x relectron= 315.74 barns/cc.

Help on Radioactivity: 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

Help on Dana Class: 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

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 Pollucite Information

Help on References: References:

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

Help on See Also: 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

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Ask about Pollucite here :
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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: