Zapatalite Mineral Data

Zapatalite Mineral Data +

General Zapatalite Information

Chemical Formula:

Cu3Al4(PO4)3(OH)9·4(H2O)

Composition:

Molecular Weight = 808.61 gm

Aluminum 13.35 % Al 25.22 % Al₂O₃

Copper 23.58 % Cu 29.51 % CuO

Phosphorus 11.49 % P 26.33 % P₂O₅

Hydrogen 2.12 % H 18.94 % H₂O

Oxygen 49.47 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₃Al₄(PO₄)₃(OH)₉·4(H₂O)

Environment:

Replacement of libethenite and pseudomalachite.

IMA Status:

Approved IMA 1972

Locality:

Cerro Morita Naco, 27 km SW of Agua Prieta, Sonora, Mexico. Link to MinDat.org Location Data.

Name Origin:

Named for Emiliano Zapata (1879-1919), hero of the Mexican Revolution.

Zapatalite Image

Images:

Zapatalite

Comments: Bright blue zapatalite coating on rock.
Location: near Battle Mountain, Lander County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Zapatalite Crystallography

Axial Ratios:

a:c = 1:0.75689

Cell Dimensions:

a = 15.22, c = 11.52, Z = 6; V = 2,668.59 Den(Calc)= 3.02

Crystal System:

TetragonalSpace Group: Unk

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

By Intensity(I/I_o): 7.62(1), 11.6(1), 6.82(0.7),

Physical Properties of Zapatalite

Cleavage:

[001] Good

Color:

Light blue.

Density:

3.016

Diaphaniety:

Translucent

Fracture:

Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Hardness:

1.5 - Between Talc and Gypsum

Streak:

light blue

Optical Properties of Zapatalite

Dichroism (e):

weak blue.

Dichroism (w):

weak blue.

Gladstone-Dale:

CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2121,KPDmeas= 0.2124,KC= 0.2149

Optical Data:

Uniaxial (-), e=1.635, w=1.646, bire=0.0110.

Calculated Properties of Zapatalite

Electron Density:

r_electron=2.99 gm/cc
note: r_Zapatalite=3.02 gm/cc.

Fermion Index

Fermion Index = 0.00024
Boson Index = 0.99976

Photoelectric:

PE_Zapatalite= 11.01 barns/electron
U=PE_Zapatalite x r_electron= 32.94 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zapatalite is Not Radioactive

Zapatalite Classification

Dana Class:

42.5.3.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.5)where (A)2 (XO4) Zq · x(H2O)

(42.5.3)Dana Group

42.5.3.1 Zapatalite Cu3Al4(PO4)3(OH)9·4(H2O) Unk Tetra

Strunz Class:

VII/D.20-10 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.20 - Zapatalite - Chalcophyllite series

VII/D.20-10 Zapatalite Cu3Al4(PO4)3(OH)9·4(H2O) Unk Tetra

VII/D.20-20 Ceruleite Cu2Al7(AsO4)4(OH)13·12(H2O) P1 1

VII/D.20-30 Parnauite Cu9(AsO4)2(SO4)(OH)10·7(H2O) P 2₁22 2 2 2

VII/D.20-35 Leogangite! Cu10(AsO4)4(SO4)(OH)6·8(H2O) C 2/c 2/m

VII/D.20-40 Liroconite Cu2Al(AsO4)(OH)4·4(H2O) I2/a 2/m

VII/D.20-50 Chalcophyllite Cu18Al2(AsO4)3(SO4)3(OH)27·33(H2O) R 3m 3 2/m

Other Zapatalite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Zapatalite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Zapatalite Specimen Label here :

Zapatalite

Cu3Al4(PO4)3(OH)9·4(H2O)
Dana No: 42.5.3.1 Strunz No: VII/D.20-10
Locality:

Notes: