Papagoite Mineral Data

Papagoite Mineral Data +

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General Papagoite Information

Chemical Formula:

CaCuAlSi2O6(OH)3

Composition:

Molecular Weight = 333.79 gm

Calcium 12.01 % Ca 16.80 % CaO

Aluminum 8.08 % Al 15.27 % Al₂O₃

Copper 19.04 % Cu 21.43 % Cu₂O

Silicon 16.83 % Si 36.00 % SiO₂

Hydrogen 0.91 % H 8.10 % H₂O

Oxygen 43.14 % O

______ ______

100.00 % 97.60 % = TOTAL OXIDE

Empirical Formula:

CaCuAlSi₂O₆(OH)₃

Environment:

Secondary mineral.

IMA Status:

Approved IMA 1960

Locality:

Ajo mine, Poma Co., Arizona. Link to MinDat.org Location Data.

Name Origin:

Named after the papago indian tribe, Arizona, USA.

Synonym:

ICSD 68187

PDF 13-372

Papagoite Image

Images:

Papagoite

Comments: Electric blue crystals of papagoite in matrix.
Location: New Cornelia mine, Ajo, Pima County, Arizona. USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Papagoite Crystallography

Axial Ratios:

a:b:c =1.1245:1:0.4085

Cell Dimensions:

a = 12.91, b = 11.48, c = 4.69, Z = 4; beta = 100.6° V = 683.23 Den(Calc)= 3.24

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.874(1), 2.204(0.9), 4.29(0.9),

Crystal Structure:

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Groat L A , Hawthorne F C , Mineralogy and Petrology , 37 (1987) p.89-96, Refinement of the structure of papagoite, CaCuAlSi2O6(OH)3, Locality: Ajo, Pima County, Arizona, USA, Note: U(1,1)(O3) changed from .0068 to match reported Uiso

Physical Properties of Papagoite

Cleavage:

[100] Imperfect

Color:

Light blue.

Density:

3.25

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

5-5.5 - Apatite-Knife Blade

Luster:

Vitreous (Glassy)

Streak:

light blue

Optical Properties of Papagoite

Gladstone-Dale:

CI meas= 0.103 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.1 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1975,KPDmeas= 0.1969,KC= 0.2195

Optical Data:

Biaxial (-), a=1.607, b=1.641, g=1.672, bire=0.0650, 2V(Calc)=84, 2V(Meas)=78.

Calculated Properties of Papagoite

Electron Density:

r_electron=3.20 gm/cc
note: r_Papagoite=3.24 gm/cc.

Fermion Index

Fermion Index = 0.00822
Boson Index = 0.99178

Photoelectric:

PE_Papagoite= 10.51 barns/electron
U=PE_Papagoite x r_electron= 33.66 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Papagoite is Not Radioactive

Papagoite Classification

Dana Class:

60.1.4.1 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.4)Dana Group

60.1.4.1 Papagoite CaCuAlSi2O6(OH)3 C 2/m 2/m

Strunz Class:

VIII/E.06-50 VIII - Silicates

VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8-

VIII/E.06 - Axinite group, Magnesio-axinite - Ashburtonite series

VIII/E.06-10 Magnesio-axinite Ca2MgAl2BO3Si4O12(OH) P1 1

VIII/E.06-20 Ferroaxinite Ca2FeAl2BO3Si4O12(OH) P1 1

VIII/E.06-30 Manganaxinite Ca2MnAl2BO3Si4O12(OH) P1 1

VIII/E.06-40 Tinzenite (Ca,Mn,Fe)3Al2BO3Si4O12(OH) P1 1

VIII/E.06-50 Papagoite CaCuAlSi2O6(OH)3 C 2/m 2/m

VIII/E.06-60 Ashburtonite HPb4Cu4Si4O12(HCO3)4(OH)4Cl I 4/m 4/m

Other Papagoite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Papagoite

CaCuAlSi2O6(OH)3
Dana No: 60.1.4.1 Strunz No: VIII/E.06-50
Locality:

Notes: