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Guildite

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About GuilditeHide

02089440014949934495496.jpg
Frank N. Guild
Formula:
CuFe3+(SO4)2(OH) · 4H2O
Colour:
Brown, yellow
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.72
Crystal System:
Monoclinic
Name:
Named by Carl Lausen in 1928 in honor of Frank Nelson Guild (28 December 1870, Jaffrey, New Hampshire, U.S.A - 12 March 1939, Tucson, Arizona, U.S.A.), professor at the University of Arizona. He was an expert in optical mineralogy and silver mineral paragenesis.
This mineral was formed under anthropogenic conditions (mine fire; Lausen, 1928) and would not be approved as a mineral species under current international rules.


Classification of GuilditeHide

Approved, 'Grandfathered' (first described prior to 1959)
6/D.10-100
7.DC.30

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
C : With only medium-sized cations; chains of edge-sharing octahedra
31.9.7.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
25.2.23

25 : Sulphates
2 : Sulphates of Cu and Ag

Physical Properties of GuilditeHide

Vitreous
Transparency:
Translucent
Colour:
Brown, yellow
Streak:
Pale yellow
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {001} and {100}, perfect.
Fracture:
Conchoidal
Density:
2.72 g/cm3 (Measured)    

Optical Data of GuilditeHide

Type:
Biaxial (+)
RI values:
nα = 1.622 - 1.623 nβ = 1.628 - 1.630 nγ = 1.681 - 1.684
Max Birefringence:
δ = 0.059 - 0.061
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak
Pleochroism:
Visible
Comments:
X = Light yellow Y = Light yellow Z = Greenish yellow
Comments:
2V small.

Chemical Properties of GuilditeHide

Formula:
CuFe3+(SO4)2(OH) · 4H2O

Crystallography of GuilditeHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 9.78 Å, b = 7.13 Å, c = 7.26 Å
β = 105.3°
Ratio:
a:b:c = 1.372 : 1 : 1.018
Unit Cell V:
488.31 ų (Calculated from Unit Cell)
Morphology:
Crystals short prismatic, pseudo-cubic to .5 cm diameter.

Type Occurrence of GuilditeHide

Other Language Names for GuilditeHide

German:Guildit
Spanish:Guildita

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Guildite associated with MagnesiocopiapiteMgFe3+4(SO4)6(OH)2 · 20H2O

Related Minerals - Nickel-Strunz GroupingHide

7.DC.05AluminiteAl2(SO4)(OH)4 · 7H2OMon. 2/m : P21/b
7.DC.05Meta-aluminiteAl2(SO4)(OH)4 · 5H2O
7.DC.10ButleriteFe3+(SO4)(OH) · 2H2OMon. 2/m : P21/m
7.DC.10ParabutleriteFe3+(SO4)(OH) · 2H2OOrth. mmm (2/m 2/m 2/m)
7.DC.15FibroferriteFe3+(SO4)(OH) · 5H2OMon.
7.DC.20XitieshaniteFe3+(SO4)Cl · 6H2OMon. 2/m : P21/b
7.DC.25BotryogenMgFe3+(SO4)2(OH) · 7H2OMon. 2/m
7.DC.25Zincobotryogen(Zn,Mg,Mn2+)Fe3+(SO4)2(OH) · 7H2OMon. 2/m
7.DC.30ChaidamuiteZnFe3+(SO4)2(OH) · 4H2OTric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

31.9.7.2ChaidamuiteZnFe3+(SO4)2(OH) · 4H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.2.1ChalcocyaniteCuSO4Orth. mmm (2/m 2/m 2/m)
25.2.2BonattiteCuSO4 · 3H2OMon.
25.2.3ChalcanthiteCuSO4 · 5H2OTric. 1 : P1
25.2.4BoothiteCuSO4 · 7H2OMon.
25.2.5DolerophaniteCu2(SO4)OMon. 2/m : B2/m
25.2.6AntleriteCu3(SO4)(OH)4Orth. mmm (2/m 2/m 2/m)
25.2.7BrochantiteCu4(SO4)(OH)6Mon. 2/m : P21/b
25.2.8PosnjakiteCu4(SO4)(OH)6 · H2OMon. m : Pm
25.2.9LangiteCu4(SO4)(OH)6 · 2H2OMon. m
25.2.10WroewolfeiteCu4(SO4)(OH)6 · 2H2OMon. m : Pm
25.2.11KröhnkiteNa2Cu(SO4)2 · 2H2OMon. 2/m : P21/b
25.2.12NatrochalciteNaCu2(SO4)2(OH) · 2H2OMon. 2/m : B2/m
25.2.13PiypiteK4Cu4O2(SO4)4 · (Na,Cu)ClTet.
25.2.14FedotoviteK2Cu3(SO4)3OMon. 2/m : B2/b
25.2.15CyanochroiteK2Cu(SO4)2 · 6H2OMon. 2/m
25.2.16EuchlorineKNaCu3(SO4)3OMon.
25.2.17DevillineCaCu4(SO4)2(OH)6 · 3H2OMon. 2/m : P21/b
25.2.18LeightoniteK2Ca2Cu(SO4)4 · 2H2OTric.
25.2.19ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2OMon. 2 : P21
25.2.20CyanotrichiteCu4Al2(SO4)(OH)12 · 2H2OOrth.
25.2.21WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2OTrig. 3m (3 2/m) : R3m
25.2.22CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2OMon.
25.2.24RansomiteCuFe2(SO4)4 · 6H2OMon. 2/m : P21/b
25.2.26KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2Mon.
25.2.27Poitevinite(Cu,Fe)SO4 · H2OTric.
25.2.28ArgentojarositeAgFe3+3(SO4)2(OH)6Trig. 3m : R3m

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 GuilditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lausen, C. (1928) Hydrous sulphates formed under fumerolic conditions at the United Verde Mine. American Mineralogist: 13: 203-229.
Palache, C., Berman, H., Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 619.
Laughon, R.B. (1970) Mineralogical notes. New data on guildite. American Mineralogist: 55: 502-505.
Wan, C., Ghose, S., Rossman, G.R. (1978) Guildite, a layer structure with a ferric hydroxy–sulphate chain and its optical absorption spectra. American Mineralogist: 63: 478-483.

Internet Links for GuilditeHide

Localities for GuilditeHide

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.
Australia
 
  • New South Wales
    • Durham Co.
      • Moonan Brook
        • Moonan
Ashley, P.M., Lottermoser, B.G. (1999) Geochemical, mineralogical and biogeochemical characterisation of abandoned metalliferous mine sites, Southern New England Orogen. In Flood, P.G. (ed.) Regional Geology, tectonics and metallogenesis, New England Orogen, 1-3 Forum, 1999, Department of Earth Science, U.N.E. Australia, 409-417.
Canada
 
  • Ontario
    • Sudbury District
Schindler, M., Mantha, N., Kyser, K. T., Murayama, M., & Hochella Jr, M. F. (2012). Shining light on black rock coatings in smelter-impacted areas. Geoscience Canada, 39(3).
Slovakia
 
  • Banská Bystrica Region
    • Banská Bystrica Co.
      • Poniky (Poinik)
Pauliš,P.,Ďuďa,R.,2002: Nejzajímavejší mineralogická naletište Slovenska. Kuttna,K.Hora, 136p
USA (TL)
 
  • Arizona
    • Yavapai Co.
      • Black Hills (Black Hill Range)
        • Verde Mining District
          • Jerome
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 240; Lausen, C. (1928), Hydrous sulphates formed under fumerolic conditions at the United Verde mine, American Mineralogist: 13: 203-229; Laughon, R.B. (1970), New data on guildite, American Mineralogist: 55: 502-505; Galbraith, F.W. & Brennan (1959), Minerals of Arizona: 66.
 
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