General Barrerite Information![]() (Na,K,Ca)2Al2Si7O18•6(H2O) |
![]() Molecular Weight = 2,680.57 gm |
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Potassium 1.55 % K 1.86 % K2O |
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Sodium 4.67 % Na 6.30 % Na2O |
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Calcium 1.26 % Ca 1.76 % CaO |
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Magnesium 0.15 % Mg 0.26 % MgO |
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Aluminum 8.24 % Al 15.58 % Al2O3 |
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Iron 0.02 % Fe 0.03 % FeO |
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Silicon 23.80 % Si 50.93 % SiO2 |
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Hydrogen 1.94 % H 17.33 % H2O |
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Oxygen 58.36 % O |
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100.00 % 94.03 % = TOTAL OXIDE |
![]() Na5.45K1.06Ca0.84Mg0.17Al8.19Fe2+0.01Si22.72O72·25.78(H2O) |
![]() On the walls of large fractures in deeply weathered andesitic and rhyolitic lavas. |
![]() Approved IMA 1974 |
![]() Found near Capo Pula, below South Efisio Tower, Nora, Sardinia, Italy. Link to MinDat.org Location Data. |
![]() For Richard Maling Barrer (1910- ), New Zealand-born British teacher ad student of the chemistry of zeolites. |
![]() Barrerite + Pronunciation |
![]() ![]() ICSD 4396 |
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PDF 29-1185 |
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Barrerite Crystallography![]() a:b:c =0.7496:1:0.9803 |
![]() a = 13.643, b = 18.2, c = 17.842, Z = 2; V = 4,430.21 Den(Calc)= 2.01 |
![]() Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Amma or Ammm |
![]() By Intensity(I/Io): 4.054(1), 9.1(1), 3.028(0.8), |
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| Physical Properties of Barrerite![]() {???} Perfect |
![]() White, Pink. |
![]() 2.13 |
![]() Transparent to Translucent |
![]() 3-4 - Calcite-Fluorite |
![]() Vitreous (Glassy) |
![]() white |
| Optical Properties of Barrerite![]() CI meas= -0.048 (Good) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.111 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.241,KPDmeas= 0.2274,KC= 0.217 Ncalc = 1.44 - 1.46 ![]() Biaxial (-), a=1.4791, b=1.4851, g=1.4891, bire=0.0100, 2V(Calc)=78, 2V(Meas)=78. |
| Calculated Properties of Barrerite![]() Bulk Density (Electron Density)=2.16 gm/cc |
note: Specific Gravity of Barrerite =2.13 gm/cc. ![]() Fermion Index = 0.01 |
Boson Index = 0.99 ![]() PEBarrerite = 1.61 barns/electron |
U=PEBarrerite x relectron= 3.47 barns/cc. ![]() |
GRapi = 22.57 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Barrerite | Barrerite Classification![]() 77.01.04.05 (77)Tectosilicate Zeolite group |
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(77.01)true zeolites |
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(77.01.04)Heulandite and related species |
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![]() 09.GE.15 09 - SILICATES (Germanates) |
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09.G - Tektosilicates with Zeolitic H2O |
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09.GE -Chains of T10O20 Tetrahedra |
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| Other Barrerite Information![]() NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
![]() Links to other databases for Barrerite : |
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 Search for Barrerite using: Visit our Advertisers for Barrerite : A Bijoux Google Search for BarreriteAdam's Minerals Google Search for Barrerite Cape Minerals Google Search for Barrerite Dakota Matrix Minerals Google Search for Barrerite Excalibur Mineral Corp. Google Search for Barrerite Exceptional Minerals Google Search for Barrerite John Betts Fine Minerals Search for Barrerite McDougall Minerals Google Search for Barrerite Mineral News Website Link Rock and Mineral Shows Google Search for Barrerite Weinrich Minerals, Inc. Google Search for Barrerite Ask about Barrerite here : Print or Cut-and-Paste your Barrerite Specimen Label here :
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