General Pezzottaite Information![]() Cs(Be2Li)Al2Si6O18 |
![]() Molecular Weight = 658.80 gm |
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Cesium 14.93 % Cs 15.83 % Cs2O |
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Potassium 0.06 % K 0.07 % K2O |
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Rubidium 0.52 % Rb 0.57 % Rb2O |
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Sodium 1.40 % Na 1.88 % Na2O |
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Lithium 0.99 % Li 2.13 % Li2O |
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Beryllium 4.19 % Be 11.62 % BeO |
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Aluminum 8.35 % Al 15.79 % Al2O3 |
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Silicon 25.58 % Si 54.72 % SiO2 |
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Hydrogen 0.03 % H 0.27 % H2O |
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Oxygen 43.96 % O |
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100.00 % 102.88 % = TOTAL OXIDE |
![]() Cs0.74Rb0.04K0.01Na0.4Be3.06Li0.94Al2.04Si6O18(H2O)0.1 |
![]() Late-stage pocket mineral formed in a granitic pegmatite. Beryl group |
![]() Approved IMA 2004 (Dana # Added) |
![]() Sakavalana pegmatite, located 25 km south of the village of Mandosonoro, SW of Antsirabe, Fianarantsoa province, central Madagascar. Link to MinDat.org Location Data. |
![]() Named for Federico Pezzotta of the Museo Civico, Milano, Italy for his work on the granitic pegmatites of Madagascar. |
![]() IMA2003-022 |
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Pezzottaite Crystallography![]() a:c = 1:1.74357 |
![]() a = 15.946, c = 27.803, Z = 18; V = 6,122.46 Den(Calc)= 3.22 |
![]() Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3c |
![]() By Intensity(I/Io): 3.271(1)(036), 2.871(0.52)(153), 3.027(0.41)(146),
3.09(0.29)(150), 3.019(0.29), 1.636(0.14)(0.6.12), 2.215(0.14)(207), 1.749(0.12)(3 |
| Physical Properties of Pezzottaite![]() {001} Imperfect |
![]() Raspberry red, Pink. |
![]() 2.97 |
![]() Translucent to transparent |
![]() Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
![]() Hexagonal - Six-sided crystal shape in cross-section or habit. |
![]() Tabular - Form dimensions are thin in one direction. |
![]() 8 - Topaz |
![]() Vitreous (Glassy) |
![]() white |
| Optical Properties of Pezzottaite![]() CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.075 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1898,KPDmeas= 0.2057,KC= 0.2051 Ncalc = 1.61 - 1.66 ![]() Uniaxial (-), e=1.601-1.611, w=1.612-1.62, bire=0.0090-0.0110. |
| Calculated Properties of Pezzottaite![]() Bulk Density (Electron Density)=2.86 gm/cc |
note: Specific Gravity of Pezzottaite =2.97 gm/cc. ![]() Fermion Index = 0.05 |
Boson Index = 0.95 ![]() PEPezzottaite = 60.91 barns/electron |
U=PEPezzottaite x relectron= 174.27 barns/cc. ![]() |
GRapi = 212.96 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Pezzottaite | Pezzottaite Classification![]() 61.01.01.05 (61)Cyclosilicate Six-Membered Rings |
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(61.01)with [Si6O18] rings; possible (OH) and Al substitution |
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(61.01.01)Beryl group |
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![]() 09.CJ.05 09 - SILICATES (Germanates) |
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09.C - Cyclosilicates |
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09.CJ -[Si6O18]12- 6-membered single rings (sechser-Einfachringe), |
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| Other Pezzottaite Information![]() NAME( MinRec 35:369) PHYS. PROP.(MinRec 35:369) OPTIC PROP.(MinRec 35:369) |
![]() Links to other databases for Pezzottaite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineral and Gemstone Kingdom 8 - Mineralienatlas (Deutsch) 9 - Online Mineral Museum 10 - QUT Mineral Atlas 11 - Ruff.Info Search for Pezzottaite using: Visit our Advertisers for Pezzottaite : A Bijoux Google Search for PezzottaiteAdam's Minerals Google Search for Pezzottaite Cape Minerals Google Search for Pezzottaite Dakota Matrix Minerals Google Search for Pezzottaite Excalibur Mineral Corp. Google Search for Pezzottaite Exceptional Minerals Google Search for Pezzottaite John Betts Fine Minerals Search for Pezzottaite McDougall Minerals Google Search for Pezzottaite Mineral News Website Link Rock and Mineral Shows Google Search for Pezzottaite Weinrich Minerals, Inc. Google Search for Pezzottaite Ask about Pezzottaite here : Print or Cut-and-Paste your Pezzottaite Specimen Label here :
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