Guildite Mineral Data

Guildite Mineral Data +

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General Guildite Information

Chemical Formula:

CuFe+++(SO4)2(OH)·4(H2O)

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

Empirical Formula:

CuFe³⁺(SO₄)₂(OH)·4(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1928

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 100630

PDF 23-217

Guildite Image

Images:

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

Axial Ratios:

a:b:c =1.3717:1:1.018

Cell Dimensions:

a = 9.786, b = 7.134, c = 7.263, Z = 2; beta = 105.28° V = 489.13 Den(Calc)= 2.72

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.144(1), 9.46(0.35), 4.998(0.27),

Physical Properties of Guildite

Cleavage:

[???] Perfect

Color:

Brown, Honey yellow, Dark brown.

Density:

2.73

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

2.5 - Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

light yellow

Optical Properties of Guildite

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

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

Electron Density:

r_electron=2.72 gm/cc
note: r_Guildite=2.72 gm/cc.

Fermion Index

Fermion Index = 0.0044
Boson Index = 0.9956

Photoelectric:

PE_Guildite= 11.80 barns/electron
U=PE_Guildite x r_electron= 32.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Guildite is Not Radioactive

Guildite Classification

Dana Class:

31.9.7.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.9)where (A+ B++) (XO4) Zq·x(H2O)

(31.9.7)Dana Group

31.9.7.1 Guildite CuFe(SO4)2(OH)·4(H2O) P 2₁/m 2/m

31.9.7.2 Chaidamuite (Zn,Fe)Fe(SO4)2(OH)·4(H2O) P1 1

Strunz Class:

VI/D.10-100 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.10 - Copiapite group, Botryogen - Chaidamuite

VI/D.10-10 Botryogen MgFe(SO4)2(OH)·7(H2O) P 2₁/n 2/m

VI/D.10-20 Zincobotryogen (Zn,Mg,Mn)Fe(SO4)2(OH)·7(H2O) P 2₁/n 2/m

VI/D.10-30 Calciocopiapite CaFe4(SO4)6(OH)2·19(H2O) P1 1

VI/D.10-40 Magnesiocopiapite MgFe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-50 Copiapite FeFe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-60 Cuprocopiapite CuFe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-70 Zincocopiapite ZnFe4(SO4)6(OH)2·18(H2O) P1 1

VI/D.10-80 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2·20(H2O) P1 1

VI/D.10-90 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-100 Guildite CuFe(SO4)2(OH)·4(H2O) P 2₁/m 2/m

VI/D.10-110 Chaidamuite (Zn,Fe)Fe(SO4)2(OH)·4(H2O) P1 1

Other Guildite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Guildite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Translate Guildite Mineral Data :

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

Guildite

CuFe+++(SO4)2(OH)·4(H2O)
Dana No: 31.9.7.1 Strunz No: VI/D.10-100
Locality:

Notes: