Gilalite Mineral Data

Gilalite Mineral Data
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General Gilalite Information

Help on Chemical Formula: Chemical Formula: Cu5Si6O17•7(H2O)
Help on Composition: Composition: Molecular Weight = 884.34 gm
   Copper    35.93 %  Cu   44.97 % CuO
   Silicon   19.06 %  Si   40.77 % SiO2
   Hydrogen   1.60 %  H    14.26 % H2O
   Oxygen    43.42 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu5Si6O17•7(H2O)
Help on Environment: Environment: Garnet-diopside tactite zone.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Christmas mine, Gila County, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its locality.
Help on Name Pronunciation: Name Pronunciation: Gilalite Say GILALITE
 

Gilalite Image

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Gilalite

Comments: Striated, prismatic pale greenish yellow crystal of gilalite.
Location: Christmas mine, Hayden, Gila County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Gilalite

Comments: Green spherical crystals of gilalite to 0.3mm in grape-like bunches.
Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Gilalite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.6983:1:0.471
Help on Cell Dimensions: Cell Dimensions: a = 13.38, b = 19.16, c = 9.026, Z = 4; beta = 90° V = 2,313.91 Den(Calc)= 2.54
Help on Crystal System: Crystal System: MonoclinicSpace Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 13.49(1), 7.786(0.5), 10.97(0.5),
 

Physical Properties of Gilalite

Help on Color: Color: Blue green, Green.
Help on Density: Density: 2.82
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 2 - Gypsum
Help on Streak: Streak: light green
 

Optical Properties of Gilalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.145 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2402,KPDmeas= 0.2163,KC= 0.2097
Ncalc = 1.53 - 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.56, b=1.635, g=1.635, bire=0.0750
 

Calculated Properties of Gilalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.77 gm/cc
note: Specific Gravity of Gilalite =2.82 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0091096061
Boson Index = 0.9908903939
Help on Photoelectric: Photoelectric: PEGilalite = 16.17 barns/electron
U=PEGilalite x rElectron Density= 44.86 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gilalite is Not Radioactive
 

Gilalite Classification
Help on Dana Class: Dana Class: 78.04.04.01 (78)Unclassified silicates
  (78.04)possible inosilicates
  (78.04.04)Dana Group
 
78.04.04.01 Gilalite Cu5Si6O17•7(H2O) Unk Mono
Help on Strunz Class: Strunz Class: 09.HE.05 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HE -With Cu, Zn
 
09.HE.05 Gilalite Cu5Si6O17•7(H2O) Unk Mono
 

Other Gilalite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Gilalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Glendale Community College
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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Ask about Gilalite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Gilalite Specimen Label here :

Gilalite

Cu5Si6O17•7(H2O)
Dana No: 78.04.04.01 Strunz No: 09.HE.05
Locality:

 

Notes: