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Apachite

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Formula:
Cu9Si10O29 · 11H2O
Colour:
Blue ("faience-blue")
Crystal System:
Monoclinic
Name:
Named for the Apache tribe that live in the area of the Christmas Mine
Note: specimens of acicular dioptase haven been erroneously sold as apachite.


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Classification of ApachiteHide

Approved
9.HE.10

9 : SILICATES (Germanates)
H : Unclassified silicates
E : With Cu, Zn
78.4.1.1

78 : Unclassified Silicates
4 :
14.2.11

14 : Silicates not Containing Aluminum
2 : Silicates of Cu

Physical Properties of ApachiteHide

Colour:
Blue ("faience-blue")

Optical Data of ApachiteHide

Type:
Biaxial (-)
RI values:
nα = 1.610 nβ = 1.650 nγ = 1.650
Max Birefringence:
δ = 0.040
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong

Chemical Properties of ApachiteHide

Formula:
Cu9Si10O29 · 11H2O
IMA Formula:
Cu2+9Si10O29 · 11H2O
Common Impurities:
Mg,Ca

Crystallography of ApachiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 12.89 Å, b = 6.05 Å, c = 19.11 Å
β = 90.42°
Ratio:
a:b:c = 2.131 : 1 : 3.159
Unit Cell V:
1,490.24 ų (Calculated from Unit Cell)

Type Occurrence of ApachiteHide

Synonyms of ApachiteHide

Other Language Names for ApachiteHide

German:Apachit
Spanish:Apachita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Ruizite3 photos of Apachite associated with Ruizite on mindat.org.
Gilalite2 photos of Apachite associated with Gilalite on mindat.org.
Calcite1 photo of Apachite associated with Calcite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.HE.05GilaliteCu5Si6O17 · 7H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.2.1DioptaseCuSiO3 · H2OTrig. 3 : R3
14.2.2ShattuckiteCu5(Si2O6)2(OH)2Orth. mmm (2/m 2/m 2/m)
14.2.3PlancheiteCu8(Si8O22)(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
14.2.4GilaliteCu5Si6O17 · 7H2OMon.
14.2.5ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2OOrth.
14.2.6LitidioniteCuNaKSi4O10Tric.
14.2.7ReinhardbraunsiteCa5(SiO4)2(OH,F)2Mon. 2/m : P21/b
14.2.8CuprorivaiteCaCuSi4O10Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
14.2.9KinoiteCa2Cu2(H2O)2[Si3O10]Mon. 2/m : P21/m
14.2.10StringhamiteCaCu(SiO4) · H2OMon.

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.

References for ApachiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Cesbron, F.P., Williams, S.A. (1980) Apachite and gilalite, two new copper silicates from Christmas, Arizona. Mineralogical Magazine: 43: 639-641.
Fleischer, M., Cabri, L.J., Chao, G.Y., Pabst, A. (1980) New mineral names. American Mineralogist: 65: 1065-1070.

Internet Links for ApachiteHide

Localities for ApachiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Namibia
 
  • Kunene Region
    • Kaokoveld Plateau
Bowell, R J et al (2013) Minerals of the Kaokoveld District, Kunene Region, Namibia. Mineralogical Record 44:485-504
USA (TL)
 
  • Arizona
    • Gila Co.
      • Dripping Spring Mts
        • Banner District
          • Christmas area
            • Christmas
Cesbron, F.P. & S.A. Williams (1980), Apachite and gilalite, two new copper silicates from Christmas, AZ, Mineralogical Magazine: 43: 639-641; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 116, 428.
  • New Mexico
    • Socorro Co.
      • Abbey District
Minerals of New Mexico 3rd ed.
Mineral and/or Locality  
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