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Pezzottaite

A valid IMA mineral species
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About PezzottaiteHide

06402840014946297645999.jpg
Federico Pezzotta
Formula:
Cs(Be2Li)Al2(Si6O18)
Colour:
Raspberry-red to pink
Lustre:
Vitreous
Hardness:
8
Specific Gravity:
2.97
Crystal System:
Trigonal
Member of:
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.




Unique IdentifiersHide

Mindat ID:
25652
Long-form identifier:
mindat:1:1:25652:6
GUID
(UUID V4):
44789bb0-862d-4c7b-8365-7258c774ba75

IMA Classification of PezzottaiteHide

Approved
IMA Formula:
CsLiBe2Al2Si6O18
Approval year:
2003
First published:
2004

Classification of PezzottaiteHide

9.CJ.60

9 : SILICATES (Germanates)
C : Cyclosilicates
J : [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
PezIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of PezzottaiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Raspberry-red to pink
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
(001)
Parting:
None observed
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.97 g/cm3 (Measured)    3.06 g/cm3 (Calculated)

Optical Data of PezzottaiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.612 - 1.620 nε = 1.601 - 1.611
Max Birefringence:
δ = 0.011
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Strong
Comments:
Orange-red to purple-violet.

Chemistry of PezzottaiteHide

Mindat Formula:
Cs(Be2Li)Al2(Si6O18)

Crystallography of PezzottaiteHide

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 15.946 Å, c = 27.803 Å
Ratio:
a:c = 1 : 1.744
Unit Cell V:
6122 ų
Z:
18
Morphology:
Hexagonal tabular crystals, small flat to equant crystals. Forms are dominant {001} with minor {100} and {101}.
Twinning:
None observed.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0020677PezzottaiteGatta D G, Adamo I, Meven M, Lambruschi E (2012) A single-crystal neutron and X-ray diffraction of pezzottaite Physics and Chemistry of Minerals 39 829-8402012Sakavalana pegmatite, Ambatovita, Madagascar0298
0020678PezzottaiteGatta D G, Adamo I, Meven M, Lambruschi E (2012) A single-crystal neutron and X-ray diffraction of pezzottaite Physics and Chemistry of Minerals 39 829-8402012Sakavalana pegmatite, Ambatovita, Madagascar02.3
0012413PezzottaiteYakubivich 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 54 399-4122009Sakavalana granitic pegmatite, Antsirabe, Fianarantsoa Province, Madagascar0100
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
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.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites

Type Occurrence of PezzottaiteHide

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:
Pegmatite
Associated Minerals at Type Locality:

Synonyms of PezzottaiteHide

Other Language Names for PezzottaiteHide

Relationship of Pezzottaite to other SpeciesHide

Member of:
Other Members of this group:
AvdeeviteNaAl4(Be5Li)(Si6O18)2(H2O)1-2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
BazziteBe3Sc2(Si6O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
BerylBe3Al2(Si6O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
JohnkoivulaiteCs[Be2B]Mg2Si6O18Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
StoppaniiteBe3Fe3+2(Si6O18) · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc

Common AssociatesHide

Associated Minerals Based on Photo Data:
26 photos of Pezzottaite associated with SchorlNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
20 photos of Pezzottaite associated with AlbiteNa(AlSi3O8)
12 photos of Pezzottaite associated with ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
8 photos of Pezzottaite associated with TourmalineAD3G6 (T6O18)(BO3)3X3Z
6 photos of Pezzottaite associated with QuartzSiO2
4 photos of Pezzottaite associated with ChiavenniteCaMnBe2Si5O13(OH)2 · 2H2O
3 photos of Pezzottaite associated with Lepidolite
2 photos of Pezzottaite associated with CleavelanditeNa(AlSi3O8)
1 photo of Pezzottaite associated with OleniteNaAl3Al6(Si6O18)(BO3)3O3(OH)
1 photo of Pezzottaite associated with Alkali-berylBe3Al2(Si6O18)

Related Minerals - Strunz-mindat GroupingHide

9.CJ.AvdeeviteNaAl4(Be5Li)(Si6O18)2(H2O)1-2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.CJ.NakkaalaaqiteK2[Na3Ca]LiCa2Ti2Be4Si12O38Orth. mmm (2/m 2/m 2/m) : Fddd
9.CJ.ZolotareviteNa5Zr[Si6O15(OH)3] · 3H2OTrig. 3m (3 2/m) : R3m
9.CJ.Beryllocordierite-NaNaMg4(Al5Be)(AlSi5O18)2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Cccm
9.CJ.Beryllosachanbińskiite-NaNaMn4(Al5Be)(AlSi5O18)2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Cccm
9.CJ.05BazziteBe3Sc2(Si6O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05BerylBe3Al2(Si6O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05IndialiteMg2Al3(AlSi5O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05 vaVorobyeviteBe3Al2(Si6O18)
9.CJ.05StoppaniiteBe3Fe3+2(Si6O18) · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05Ferroindialite(Fe2+,Mg)2Al4Si5O18Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05JohnkoivulaiteCs[Be2B]Mg2Si6O18Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.10Cordierite(Mg,Fe)2Al3(AlSi5O18)Orth. mmm (2/m 2/m 2/m) : Cccm
9.CJ.10Sekaninaite(Fe,Mg)2Al3(AlSi5O18)Orth. mmm (2/m 2/m 2/m) : Cccm
9.CJ.15aCombeiteNa4.5Ca3.5Si6O17.5(OH)0.5Trig. 3m (3 2/m) : R3m
9.CJ.15bImandriteNa12Ca3Fe3+2(Si6O18)2Orth. mmm (2/m 2/m 2/m)
9.CJ.15aKazakoviteNa6Mn2+Ti(Si6O18)Trig. 3m (3 2/m) : R3m
9.CJ.15cKoashviteNa6(Ca,Mn)(Ti,Fe)Si6O18 · H2OOrth. mmm (2/m 2/m 2/m)
9.CJ.15aLovozeriteNa2Ca(Zr,Ti)(Si6O12)[(OH)4O2] · H2OTrig. 3 : R3
9.CJ.15aTisinaliteNa3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2OTrig. 3m (3 2/m)
9.CJ.15aZirsinaliteNa6(Ca,Mn2+,Fe2+)Zr(Si6O18)Trig. 3m (3 2/m) : R3m
9.CJ.15aLitvinskiteNa2(◻,Na,Mn)ZrSi6O12(OH,O)6Mon. m : Bm
9.CJ.15aKapustiniteNa6ZrSi6O16(OH)2Mon. 2/m : B2/m
9.CJ.15aTownenditeNa8ZrSi6O18Trig. 3m (3 2/m) : R3m
9.CJ.25BaratoviteKCa7(Ti,Zr)2Li3Si12O36F2Mon. 2/m : B2/b
9.CJ.25KatayamaliteKLi3Ca7Ti2(SiO3)12(OH)2Mon. 2/m : B2/b
9.CJ.25AleksandroviteKCa7Sn2Li3Si12O36F2Mon. 2/m : B2/b
9.CJ.30DioptaseCuSiO3 · H2OTrig. 3 : R3
9.CJ.35KostyleviteK2Zr(Si3O9) · H2OMon. 2/m : P21/b
9.CJ.40PetarasiteNa5Zr2(Si6O18)(Cl,OH) · 2H2OMon. 2/m : P21/m
9.CJ.45Gerenite-(Y)(Ca,Na)2(Y,REE)3Si6O18 · 2H2OTric. 1 : P1
9.CJ.50OdintsoviteK2Na4Ca3Ti2Be4Si12O38Orth. mmm (2/m 2/m 2/m) : Fddd
9.CJ.55MathewrogersitePb7FeAl3GeSi12O36(OH,H2O)6Trig.

Fluorescence of PezzottaiteHide

blue shortwave-excited luminescence excited by SW UV caused by titanate groups (TiO6)

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for PezzottaiteHide

References for PezzottaiteHide

Reference List:

Localities for PezzottaiteHide

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.

Locality ListHide

- 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
Herb Obodda
  • Nuristan
    • Parun pegmatite field
- (2005)
Austria
 
  • Lower Austria
    • Waidhofen an der Thaya District
      • Raabs an der Thaya
        • Eibenstein an der Thaya
Kolitsch et al. (2020)
Czech Republic
 
  • Vysočina Region
    • Žďár nad Sázavou District
      • Bystřice nad Pernštejnem
Přikryl et al. (2012)
Madagascar (TL)
 
  • Amoron'i Mania
    • Ambatofinandrahana District
      • Mandrosonoro
        • Ambatovita
Laurs et al. (Skip) +2 other references
  • Vakinankaratra
    • Antsirabe II District
      • Ibity
        • Sahatany Valley
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
Devouard et al. (2007)
Poland
 
  • Lower Silesian Voivodeship
    • Dzierżoniów County
      • Piława Górna
        • DSS Piława Górna Quarry
A. Pieczka et al. (2016) +1 other reference
Pieczka et al. (2012)
USA
 
  • Maine
    • Oxford County
      • Greenwood
        • Uncle Tom Mountain
Falster et al. (2019)
 
Mineral and/or Locality  
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