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About GilaliteHide

Cu5Si6O17 · 7H2O
Translucent green, blue-green
Crystal System:
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

Translucent green, blue-green

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:

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 (100)
7.786 (50)
4.790 (40)
3.897 (40)
10.97 (30)
6.684 (30)
3.315 (30)

Type Occurrence of GilaliteHide

Synonyms of GilaliteHide

Other Language Names for GilaliteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
Kinoite29 photos of Gilalite associated with Kinoite on
Apophyllite15 photos of Gilalite associated with Apophyllite on
Quartz12 photos of Gilalite associated with Quartz on
Ruizite4 photos of Gilalite associated with Ruizite on
Hydroxyapophyllite-(K)4 photos of Gilalite associated with Hydroxyapophyllite-(K) on
Cuprite2 photos of Gilalite associated with Cuprite on
Apachite2 photos of Gilalite associated with Apachite on
Brochantite2 photos of Gilalite associated with Brochantite on
Copper1 photo of Gilalite associated with Copper on

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 · nH2OOrth.
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

ⓘ - 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
    • Borborema mineral province
      • Salgadinho
Gems & Gemology Magazine Fall 2005 article, volume 41, issue 3.
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium; Lavreotiki Municipality)
Schnorrer-Köhler, G., Standfuss, L. & Standfuss, K. (1991): Neue Funde aus den antiken Schlacken von Lavrion, Griechenland. Lapis, 16 (6), 21-23; 58.
  • 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.: 231, 428.
Eckhard D. Stuart
  • Nevada
    • Clark Co.
      • Spring Mts
        • Goodsprings District
NBMG Spec. Pub. 31 Minerals of Nevada
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