Ajoite Mineral Data

Ajoite Mineral Data
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General Ajoite Information

Help on Chemical Formula: Chemical Formula: (K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)
Help on Composition: Composition: Molecular Weight = 3,926.74 gm
   Potassium   2.24 %  K     2.70 % K2O
   Sodium      1.02 %  Na    1.38 % Na2O
   Aluminum    2.06 %  Al    3.89 % Al2O3
   Copper     32.37 %  Cu   40.51 % CuO
   Silicon    20.74 %  Si   44.37 % SiO2
   Hydrogen    0.82 %  H     7.34 % H2O
   Oxygen     40.74 %  O
             ______        ______ 
             100.00 %      100.20 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2.25Na1.75Cu20Al3Si29O76(OH)16•8(H2O)
Help on Environment: Environment: Secondary copper mineral.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1958
Help on Locality: Locality: New Cornelia mine, Ajo, Pima County,, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Ajoite Say AJOITE
 

Ajoite Image

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Ajoite

Comments: Bluish, bladed ajoite crystals.
Location: New Cornelia mine, Ajo, Pima County, Arizona, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Ajoite   Shattuckite

Comments: Dark blue, tabular crystals of shattuckite on light blue ajoite.
Location: New Cornelia mine, Ajo, Pima County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Ajoite

Comments: Aqua blue, long bladed crystals or ajoite on matrix.
Location: New Cornelia mine, Pima Co., Arizona, USA. Scale: Crystal size 0.75 mm.
© Tom Loomis / Dakota Matrix

Ajoite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9961:1:1.061
Help on Cell Dimensions: Cell Dimensions: a = 13.634, b = 13.687, c = 14.522, Z = 1; alpha = 110.83°, beta = 107.21°, gamma = 105.68° V = 2,329.37 Den(Calc)= 2.80
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12.4(1), 3.34(0.25), 6.19(0.09),
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Pluth J J , Smith J V , Proceedings of the National Academy of Sciences of the United States of America , 99 (2002) p.11002-11005, Arizona porphyry copper/hydrothermal deposits II:, Crystal structure of ajoite, (K+Na)3Cu20Al3Si29O76(OH)16*~8H2O

 

Physical Properties of Ajoite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Blue green.
Help on Density: Density: 2.96
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: greenish white
 

Optical Properties of Ajoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1993,KPDmeas= 0.2,KC= 0.2021
Ncalc = 1.6
Help on Optical Data: Optical Data: Biaxial (+), a=1.55, b=1.585, g=1.641, bire=0.0910, 2V(Calc)=80, 2V(Meas)=68-80.
Help on Pleochroism (x): Pleochroism (x): very light bluish green.
Help on Pleochroism (y): Pleochroism (y): brilliant bluish green.
Help on Pleochroism (z): Pleochroism (z): brilliant bluish green.
 

Calculated Properties of Ajoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Ajoite =2.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0098859471
Boson Index = 0.9901140529
Help on Photoelectric: Photoelectric: PEAjoite = 15.08 barns/electron
U=PEAjoite x relectron= 43.63 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 31.60 (Gamma Ray American Petroleum Institute Units)
Concentration of Ajoite per GRapi unit = 3.16 (%)

Estimated Radioactivity from Ajoite - barely detectable

 

Ajoite Classification
Help on Dana Class: Dana Class: 78.05.01.01 (78)Unclassified silicates
  (78.05)possible phyllosilicates
  (78.05.01)Dana Group
 
78.05.01.01 Ajoite (K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O) P1 1
Help on Strunz Class: Strunz Class: 09.EA.70 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
 
09.EA.70 Ajoite (K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O) P1 1
 

Other Ajoite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8, AmMin v 88, p 1629) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ajoite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Ajoite

(K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)
Dana No: 78.05.01.01 Strunz No: 09.EA.70
Locality:

 

Notes: