Pezzottaite (original) (raw)
Formula:
Cs(Be2Li)Al2(Si6O18)
Colour:
Raspberry-red to pink
Name:
Named by Brendan M. Laurs, et al. in 2003 in honor of Federico Pezzotta (28 October 1965, Bergamo, Italy - ), petrologist and curator at the Museo Civico, Milano, Italy, for his work on Madagascar's granitic pegmatites.
Related to beryl. Pezzottaite is trigonal while beryl is hexagonal.
Transparency:
Transparent, Translucent
Colour:
Raspberry-red to pink
Cleavage:
Imperfect/Fair
(001)
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.97 g/cm3 (Measured) 3.06 g/cm3 (Calculated)
RI values:
_n_ω = 1.612 - 1.620 _n_ε = 1.601 - 1.611
δ = 0.011
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Comments:
Orange-red to purple-violet.
Class (H-M):
3 - Rhombohedral
Cell Parameters:
a = 15.946 Å, c = 27.803 Å
Morphology:
Hexagonal tabular crystals, small flat to equant crystals. Forms are dominant {001} with minor {100} and {101}.
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020677 | Pezzottaite | Gatta D G, Adamo I, Meven M, Lambruschi E (2012) A single-crystal neutron and X-ray diffraction of pezzottaite Physics and Chemistry of Minerals 39 829-840 | 2012 | Sakavalana pegmatite, Ambatovita, Madagascar | 0 | 298 | |
| 0020678 | Pezzottaite | Gatta D G, Adamo I, Meven M, Lambruschi E (2012) A single-crystal neutron and X-ray diffraction of pezzottaite Physics and Chemistry of Minerals 39 829-840 | 2012 | Sakavalana pegmatite, Ambatovita, Madagascar | 0 | 2.3 | |
| 0012413 | Pezzottaite | Yakubivich O V, Pekov I V, Steele I M, Massa W, Chukanov N V (2009) Alkali metals in beryl and their role in the formation of derivative structural motifs: Comparative crystal chemistry of vorobyevite and pezzottaite Crystallography Reports 54 399-412 | 2009 | Sakavalana granitic pegmatite, Antsirabe, Fianarantsoa Province, Madagascar | 0 | 100 |
CIF Raw Data - click here to close
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.271 Å | (100) |
| 2.871 Å | (52) |
| 3.027 Å | (41) |
| 3.019 Å | (29) |
| 2.215 Å | (14) |
| 1.636 Å | (14) |
| 2.229 Å | (12) |
| 1.749 Å | (12) |
Comments:
Sakavalana pegmatite, Madagascar.
General Appearance of Type Material:
Isolated crystals, as irregularly shaped flat masses filling cavities between cleavelandite, quartz and tourmaline, subhedral-to-euhedral hexagonal tabular crystals to 10 cm in diameter, and as small flat to equant to elongated crystals attached to faces of large tourmaline crystals.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA.
Canadian Museum of Nature, Ottawa, Ontario, Canada.
Natural History Museum, Bern, Switzerland, number NMBE-36990.
Geological Setting of Type Material:
Associated Minerals at Type Locality:
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Afghanistan | |
|---|---|
| Kunar Dara-e-Pech District ⓘ Dara-e-Pech pegmatite field | Herb Obodda |
| Nuristan Parun pegmatite field ⓘ Dewa Mine | - (2005) |
| Austria | |
| Lower Austria Waidhofen an der Thaya District Raabs an der Thaya Eibenstein an der Thaya ⓘ Hengl quarry ? | Kolitsch et al. (2020) |
| Czech Republic | |
| Vysočina Region Žďár nad Sázavou District Bystřice nad Pernštejnem ⓘ Kovářová | Přikryl et al. (2012) |
| Madagascar (TL) | |
| Amoron'i Mania Ambatofinandrahana District Mandrosonoro Ambatovita ⓘ Sakavalana mine (TL) |
Laurs et al. (Skip) +2 other references |
| Vakinankaratra Antsirabe II District Ibity Sahatany Valley ⓘ Tompoambohitra (Tokambohitra) | Rob Lavinsky photo id 744080 ( Dr. Federico Pezzotta is cited in caption on the validity of the id) |
| Myanmar | |
| Shan State Kyaukme District Momeik Township Molo quarter ⓘ Khetchel village (Cache village; Khat Che village) | Devouard et al. (2007) |
| Poland | |
| Lower Silesian Voivodeship Dzierżoniów County Piława Górna DSS Piława Górna Quarry ⓘ Julianna pegmatite | A. Pieczka et al. (2016) +1 other reference |
| ⓘ Lithium pegmatite | Pieczka et al. (2012) |
| USA | |
| Maine Oxford County Greenwood Uncle Tom Mountain ⓘ Emmons Quarry | Falster et al. (2019) |