Mineralogy Database

Guildite Mineral Data

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General Guildite Information

Help on Chemical  Formula: Chemical Formula: CuFe+++(SO4)2(OH)•4(H2O)
Help on Composition: Composition: Molecular Weight = 400.59 gm
   Iron      13.94 %  Fe   19.93 % Fe2O3
   Copper    15.86 %  Cu   17.86 % Cu2O
   Hydrogen   2.26 %  H    20.24 % H2O
   Sulfur    16.01 %  S    39.97 % SO3
   Oxygen    51.92 %  O
            ______        ______ 
            100.00 %       98.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CuFe3+(SO4)2(OH)•4(H2O)
Help on Environment: Environment: Secondary mineral formed in mine workings by burning pyritic ores.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1928
Help on Locality: Locality: United Verde mine, Jerome, Yavapai Co., Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Frank Nelson Guild (1870-1939), American mineralogist and economic geologist, University of Arizona, Tucson, Arizona, USA.
Help on Name Pronunciation: Name Pronunciation: Guildite Say GUILDITE
Help on Synonym: Synonym: ICSD 100630
  PDF 23-217

Guildite Image

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  Guildite   Magnesiocopiapite

Comments: Brown granular guildite with greenish yellow magnesiocopiapite.
Location: United Verde Mine, Jerome, Yavapai County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Guildite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3717:1:1.018
Help on Cell Dimensions: Cell Dimensions: a = 9.786, b = 7.134, c = 7.263, Z = 2; beta = 105.28° V = 489.13 Den(Calc)= 2.72
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.144(1), 9.46(0.35), 4.998(0.27),

Physical Properties of Guildite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Brown, Honey yellow, Dark brown.
Help on Density: Density: 2.73
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light yellow

Optical Properties of Guildite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.237,KPDmeas= 0.2361,KC= 0.2441
Ncalc = 1.66 - 1.67
Help on Optical Data: Optical Data: Biaxial (+), a=1.622-1.623, b=1.628-1.63, g=1.681-1.684, bire=0.0590-0.0610

Calculated Properties of Guildite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.72 gm/cc
note: Specific Gravity of Guildite =2.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0044088701
Boson Index = 0.9955911299
Help on Photoelectric: Photoelectric: PEGuildite = 11.80 barns/electron
U=PEGuildite x rElectron Density= 32.04 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Guildite is Not Radioactive

Guildite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.09)where (A+ B++) (XO4) Zq�x(H2O)
  (31.09.07)Dana Group Guildite CuFe(SO4)2(OH)•4(H2O) P 21/m 2/m Chaidamuite (Zn,Fe)Fe(SO4)2(OH)•4(H2O) P1 1
Help on  Strunz Class: Strunz Class: 07.DC.30 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DC -With only medium-sized cations; chains of corner-sharing octahedra
07.DC.30 Chaidamuite (Zn,Fe)Fe(SO4)2(OH)•4(H2O) P1 1
07.DC.30 Guildite CuFe(SO4)2(OH)•4(H2O) P 21/m 2/m

Other Guildite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Guildite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 07.DC.30





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