Ajoite (original) (raw)

A valid IMA mineral species - grandfathered

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About AjoiteHide

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Formula:

(K,Na)Cu7AlSi9O24(OH)6 · 3H2O

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:66:2

8bf685c9-c3e1-479c-bcd1-3503bd1a78f8

IMA Classification of AjoiteHide

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Approved, 'Grandfathered' (first described prior to 1959)

IMA Formula:

K3Cu2+20Al3Si29O76(OH)16 · 8H2O

Type description reference:

Classification of AjoiteHide

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9.EA.70

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings

78.5.1.1

78 : Unclassified Silicates
5 :

16.5.6

16 : Silicates Containing Aluminum and other Metals
5 : Aluminosilicates of Cs, NH4 and Cu

Mineral SymbolsHide

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

Symbol Source Reference
Aj IMA–CNMNC Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of AjoiteHide

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Density:

2.96 g/cm3 (Measured) 2.951 g/cm3 (Calculated)

Optical Data of AjoiteHide

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RI values:

_n_α = 1.550(1) _n_β = 1.583(1) _n_γ = 1.641(1)

2V:

Measured: 80° (1), Calculated: 76.4°

δ = 0.091

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

X= very light bluish green
Y=Z= brilliant bluish green

Chemistry of AjoiteHide

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Mindat Formula:

(K,Na)Cu7AlSi9O24(OH)6 · 3H2O

Common Impurities:

Fe,Mn,Ca

Crystallography of AjoiteHide

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Cell Parameters:

a = 13.634(5) Å, b = 13.687(7) Å, c = 14.522(7) Å
α = 110.83(1)°, β = 107.21(1)°, γ = 105.68(1)°

Ratio:

a:b:c = 0.996 : 1 : 1.061

Unit Cell V:

2,195.04 ų (Calculated from Unit Cell)

Morphology:

As sprays of bladed prismatic crystals, to 0.4 mm; commonly fibrous.

From New Cornelia mine {010} is the most prominent form and {100} and {110} are much less prominent but always present. The termination on c may be either {001} or {203} or both.

Comment:

Cell parameters from Pluth and Smith (2002)

Crystal StructureHide

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ID Species Reference Link Year Locality Pressure (GPa) Temp (K)
0015331 Ajoite Pluth J J, Smith J V (2002) Arizona porphyry copper/hydrothermal deposits II: Crystal structure of ajoite, (K+Na)3Cu20Al3Si29O76(OH)16*~8H2O Proceedings of the National Academy of Sciences 99 11002-11005 2002 0 293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

d-spacing Intensity
12.25 Å (100)
4.08 Å (10)
3.381 Å (8)
3.061 Å (10)
2.832 Å (8)
2.455 Å (12)
2.258 Å (8)

Geological EnvironmentHide

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Geological Setting:

In oxidised copper-rich base-metal deposits.

Type Occurrence of AjoiteHide

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Place of Conservation of Type Material:

National Museum of Natural History, Washington, D.C., USA, 113220.

Associated Minerals at Type Locality:

Reference:

Schaller, W.T., Vlisidis, A.C. (1958) Ajoite, a new hydrous aluminum copper silicate. American Mineralogist: 43: 1107-1111.

Other Language Names for AjoiteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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9.EA. Bussyite-(Y) (Y,REE,Ca)3(Na,Ca)6MnSi9Be5(O,OH,F)34 Mon. 2 : _B_2
9.EA. Fluorapophyllite-(NH₄) NH4Ca4(Si8O20)F · 8H2O Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/m n c
9.EA. Hydroxymcglassonite-(K) KSr4Si8O20(OH) · 8H2O Tet.
9.EA. Miyawakiite-(Y) ◻Y4Fe2(Si8O20)(CO3)4(H2O)3 Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _I_4/m c m
9.EA.05 Cuprorivaite CaCuSi4O10 Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/n c c
9.EA.05 Gillespite BaFe2+Si4O10 Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/n c c
9.EA.05 Effenbergerite BaCuSi4O10 Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/n c c
9.EA.05 Wesselsite SrCuSi4O10 Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/n c c
9.EA.07 Fluorapophyllite-(Cs) CsCa4(Si8O20)F · 8H2O Tet.
9.EA.10 Ekanite Ca2ThSi8O20 Tet. 422 : _I_422
9.EA.15 Fluorapophyllite-(K) KCa4(Si8O20)(F,OH) · 8H2O Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/m n c
9.EA.15 Hydroxyapophyllite-(K) KCa4(Si8O20)(OH,F) · 8H2O Tet. 4/m m m _(_4/_m_2/_m_2/m )
9.EA.15 Fluorapophyllite-(Na) NaCa4(Si8O20)F · 8H2O Orth.
9.EA.20 Magadiite Na2Si14O29 · 11H2O Orth. m _m_2 : F d _d_2
9.EA.25 Dalyite K2ZrSi6O15 Tric. 1 : _P_1
9.EA.25 Davanite K2TiSi6O15 Tric.
9.EA.30 Sazhinite-(Ce) Na3CeSi6O15 · 2H2O Orth. m _m_2 : P m _m_2
9.EA.30 Sazhinite-(La) Na3La[Si6O15] · 2H2O Orth. m _m_2 : P m _m_2
9.EA.35 Armstrongite CaZr[Si6O15] · 3H2O Mon. 2/m : _B_2/m
9.EA.40 Okenite Ca10Si18O46 · 18H2O Tric. 1 : _P_1
9.EA.45 Nekoite Ca3Si6O15 · 7H2O Tric. 1 : _P_1
9.EA.45 Perettiite-(Y) Y2Mn4FeSi2B8O24 Orth. m m m _(_2/_m_2/_m_2/m ) : P m n a
9.EA.45 Badakhshanite-(Y) Y2Mn4Al(Si2B7BeO24) Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a
9.EA.47 Shlykovite KCa[Si4O9(OH)] · 3H2O Mon. 2/m : _P_21/b
9.EA.50 Cavansite Ca(VO)Si4O10 · 4H2O Orth. m m m _(_2/_m_2/_m_2/m )
9.EA.50 Diegogattaite Na2CaCu2Si8O20 · H2O Mon. 2/m : _B_2/m
9.EA.52 Yangite PbMnSi3O8 · H2O Tric. 1 : _P_1
9.EA.55 Pentagonite Ca(VO)Si4O10 · 4H2O Orth. m _m_2
9.EA.60 Penkvilksite Na4Ti2Si8O22 · 4H2O Orth. m m m _(_2/_m_2/_m_2/m ) : P b c n
9.EA.60 Tumchaite Na2Zr(Si4O11) · 2H2O Mon. 2/m : _P_21/b
9.EA.65 Nabesite Na2BeSi4O10 · 4H2O Orth. 222 : _P_212121
9.EA.75 Zeravshanite Na2Cs4Zr3[Si18O45]*2H2O Mon. 2/m : _B_2/b
9.EA.80 Bussyite-(Ce) (Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4 Mon. 2/m : _B_2/b
9.EA.85 Plumbophyllite Pb2Si4O10 · H2O Orth. m m m _(_2/_m_2/_m_2/m ) : P b c n

Other InformationHide

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Health Risks:

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

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References for AjoiteHide

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Localities for AjoiteHide

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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

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- 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.

Austria
Carinthia Villach-Land District Finkenstein am Faaker See Mallestiger Mittagskogel ⓘ Neufinkenstein-Grabanz mining district G.Blaß
Vorarlberg Bludenz District Silbertal Rinder valley (Gafluna valley) ⓘ Putzkammer Alp Niedermayr (1996)
Germany
North Rhine-Westphalia Arnsberg Hochsauerlandkreis Bestwig ⓘ Ramsbeck Schnorrer-Köhler (1990)
Japan
Tochigi Prefecture Nikko City Ashio ⓘ Ashio mine (Ashio copper mine) Numao et al (2005)
Mexico
Sonora Cananea Municipality ⓘ Rancho Jacalito Megaw (2023)
Namibia
Kunene Region Khorixas Mesopotamia copper valley ⓘ Mesopotamia 504 Farm Gerhard Niedermayr: Mesopotamia 504 - ...
Romania
Suceava County Iacobeni ⓘ Arșița mine minerals-of-the-carpathians.eu (2008)
Tolovanu ⓘ Tolovanu (Tolovan) Mn deposit Hîrtopanu (1997) +1 other reference
South Africa
Limpopo Vhembe District Municipality Musina Local Municipality ⓘ Musina Cairncross (1991) +2 other references
ⓘ Messina Mine Cairncross et al. (1995)
Spain
Catalonia Tarragona Priorat Cornudella de Montsant ⓘ Turquoise mine (Mina de la Turquesa; Mas de les Moreres) Joan Abella i Creus (Joanabellacreus@gmail.com)
UK
England Devon West Devon Gulworthy ⓘ New East Wheal Russell (South Wheal Crebor) ? www.mindat.org (n.d.)
USA
Arizona Maricopa County Osborn Mining District Hummingbird Springs ⓘ Moon Anchor Mine Williams (1968) +1 other reference
Vulture Mining District ⓘ Potter-Cramer Mine Williams (1968) +2 other references
Pima County ⓘ Ajo Mining District Sun (1961) +1 other reference
Little Ajo Mountains Ajo ⓘ New Cornelia Mine (TL) Schaller et al. (1958) +7 other references
Pinal County Bunker Hill District (Copper Creek District) ⓘ Copper Creek (Copper Creek Canyon) Thorne (n.d.)
ⓘ Unspecified/unnamed prospect/diggings Mr. Joe Ruiz.