| Pezzottaite Mineral Data |
General Pezzottaite Information |
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| Cs(Be2Li)Al2Si6O18 | |||
| Molecular Weight = 658.80 gm | |||
| Cesium 14.93 % Cs 15.83 % Cs2O | |||
| Potassium 0.06 % K 0.07 % K2O | |||
| Rubidium 0.52 % Rb 0.57 % Rb2O | |||
| Sodium 1.40 % Na 1.88 % Na2O | |||
| Lithium 0.99 % Li 2.13 % Li2O | |||
| Beryllium 4.19 % Be 11.62 % BeO | |||
| Aluminum 8.35 % Al 15.79 % Al2O3 | |||
| Silicon 25.58 % Si 54.72 % SiO2 | |||
| Hydrogen 0.03 % H 0.27 % H2O | |||
| Oxygen 43.96 % O | |||
| ______ ______ | |||
| 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 | |||
Pezzottaite Image | |||
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Pezzottaite Crystallography |
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| 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 |
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| [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 |
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| 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 |
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| Uniaxial (-), e=1.601-1.611, w=1.612-1.62, bire=0.0090-0.0110. | |||
Calculated Properties of Pezzottaite |
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relectron=2.86 gm/cc |
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| Fermion Index = 0.05475 Boson Index = 0.94525 |
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PEPezzottaite = 60.91 barns/electron |
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| GRapi = 212.96 (Gamma Ray American Petroleum Institute Units) Estimated Radioactivity from Pezzottaite |
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Pezzottaite Classification |
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| 61.1.1.5 (61)Cyclosilicate Six-Membered Rings | |||
| (61.1)with [Si6O18] rings; possible (OH) and Al substitution | |||
| (61.1.1)Beryl group | |||
| VIII/EX.00-00 VIII - Silicates | |||
| VIII/EX - Unclassified Strunz Cyklosilicates | |||
| VIII/EX.00 - Beryl group | |||
Other Pezzottaite Information |
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| 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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Pezzottaite using: Visit our Advertisers for Pezzottaite : Translate Pezzottaite Mineral Data : Ask about Pezzottaite here : Print or Cut-and-Paste your Pezzottaite Specimen Label here :
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