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About GilaliteHide

Cu5Si6O17 · 7H2O
Translucent green, blue-green
Specific Gravity:
Crystal System:
For Gila Co., Arizona, USA, where it was found.
This page provides mineralogical data about Gilalite.

Classification of GilaliteHide


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

78 : Unclassified Silicates
4 :

14 : Silicates not Containing Aluminum
2 : Silicates of Cu

Physical Properties of GilaliteHide

Transparent, Translucent
Translucent green, blue-green
2.72(5) g/cm3 (Measured)    2.54 g/cm3 (Calculated)

Optical Data of GilaliteHide

Biaxial (-)
RI values:
nα = 1.560 nβ = 1.635 nγ = 1.635
Max Birefringence:
δ = 0.075
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Weak in drab grayish green.
2V is very small

Chemical Properties of GilaliteHide

Cu5Si6O17 · 7H2O
Common Impurities:

Crystallography of GilaliteHide

Crystal System:
Cell Parameters:
a = 13.38 Å, b = 19.16 Å, c = 9.02 Å
β = 90°
a:b:c = 0.698 : 1 : 0.471
Unit Cell V:
2,312.37 ų (Calculated from Unit Cell)
Neither point group nor space group known.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
13.4 Å(100)
7.786 Å(50)
4.790 Å(40)
3.897 Å(40)
10.97 Å(30)
6.684 Å(30)
3.315 Å(30)

Type Occurrence of GilaliteHide

Place of Conservation of Type Material:
The Natural History Museum, London, England, 1980,533; University of Arizona, Tucson, Arizona; National Museum of Natural History, Washington, D.C., USA, 150201.
Associated Minerals at Type Locality:

Synonyms of GilaliteHide

Other Language Names for GilaliteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
29 photos of Gilalite associated with KinoiteCa2Cu2(H2O)2[Si3O10]
15 photos of Gilalite associated with Apophyllite
12 photos of Gilalite associated with QuartzSiO2
4 photos of Gilalite associated with RuiziteCa2Mn3+2[Si4O11(OH)2](OH)2 · 2H2O
4 photos of Gilalite associated with Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
2 photos of Gilalite associated with CupriteCu2O
2 photos of Gilalite associated with ApachiteCu9Si10O29 · 11H2O
2 photos of Gilalite associated with BrochantiteCu4(SO4)(OH)6
1 photo of Gilalite associated with CopperCu

Related Minerals - Nickel-Strunz GroupingHide

9.HE.10ApachiteCu9Si10O29 · 11H2OMon.

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)
14.2.5ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1Orth.
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.
14.2.11ApachiteCu9Si10O29 · 11H2OMon.

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 GilaliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Cesbron, F.P. and S.A. Williams (1980): Apachite and gilalite, two new copper silicates from Christmas, Arizona. Mineral. Mag., 43, 639-641. [Abs. in American Mineralogist: 65: 1065]

Internet Links for GilaliteHide

Localities for GilaliteHide

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.
Rob Lavinsky
  • Paraíba
    • Salgadinho
Gems & Gemology Magazine Fall 2005 article, volume 41, issue 3.
  • Attica
    • East Attica
      • Lavreotiki
Schnorrer-Köhler, G., Standfuss, L. & Standfuss, K. (1991): Neue Funde aus den antiken Schlacken von Lavrion, Griechenland. Lapis, 16 (6), 21-23; 58.
  • Lombardy
    • Lecco Province
      • Introbio
Vergani, F., Gentile, P., Guastoni, A., and Possenti, L. (2020) I minerali della miniera di Valbona e dello Zucco di Cam. Una mineralizzazione ad arseniati in Val Biandino (Introbio, Valsassina, LC). Rivista Mineralogica Italiana, 44, 2 (2-2020), 76-89 and 93.
Vergani, F., Gentile, P., Guastoni, A., and Possenti, L. (2020) I minerali della miniera di Valbona e dello Zucco di Cam. Una mineralizzazione ad arseniati in Val Biandino (Introbio, Valsassina, LC). Rivista Mineralogica Italiana, 44, 2 (2-2020), 76-89 and 93.
  • Arizona
    • Gila Co.
      • Banner Mining District
        • 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.: 231, 428.
Eckhard D. Stuart
  • Nevada
    • Clark Co.
      • Spring Mountains
        • Goodsprings Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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