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Goldichite

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Samuel Stephen Goldich
Formula:
KFe(SO4)2 · 4H2O
Colour:
Pale yellowish green
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.43
Crystal System:
Monoclinic
Name:
Named in 1955 by Abraham Rosenzweig and Eugene B. Gross in honor of Dr. Samuel Stephen Goldich ["January", 1909 USA - December 20, 2000 Applewood, Colorado, USA], American mineralogist, University of Minnesota and founding chief of the USGS Branch of Isotope Geology. The Goldich Stability Series was devised by him.
This page provides mineralogical data about Goldichite.


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Classification of GoldichiteHide

Approved, 'Grandfathered' (first described prior to 1959)
7.CC.40

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
29.5.2.1

29 : HYDRATED ACID AND NORMAL SULFATES
5 : AB(XO4)2·xH2O
25.11.8

25 : Sulphates
11 : Sulphates of Fe and other metals

Physical Properties of GoldichiteHide

Vitreous
Transparency:
Transparent
Colour:
Pale yellowish green
Comment:
Lavender tint in artificial light.
Streak:
White
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {100}
Density:
2.43 g/cm3 (Measured)    2.461 g/cm3 (Calculated)

Optical Data of GoldichiteHide

Type:
Biaxial (+)
RI values:
nα = 1.582 - 1.584 nβ = 1.602(2) nγ = 1.629 - 1.639
2V:
Measured: 82° , Calculated: 75° to 82°
Max Birefringence:
δ = 0.047 - 0.055
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong
Pleochroism:
Weak
Comments:
X= colorless
Y= colorless to pale yellow
Z= very pale yellow

Chemical Properties of GoldichiteHide

Formula:
KFe(SO4)2 · 4H2O
IMA Formula:
KFe3+(SO4)2 · 4H2O

Crystallography of GoldichiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 10.387(6) Å, b = 10.486(6) Å, c = 9.086(5) Å
β = 101.68(7)°
Ratio:
a:b:c = 0.991 : 1 : 0.866
Unit Cell V:
969.14 ų (Calculated from Unit Cell)
Z:
4

Crystallographic forms of GoldichiteHide

Crystal Atlas:
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Goldichite - {100}, {110}, {011},
3d models and HTML5 code kindly provided by www.smorf.nl.

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Type Occurrence of GoldichiteHide

Place of Conservation of Type Material:
Smithsonian Museum, Washington DC, USA

Other Language Names for GoldichiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Coquimbite17 photos of Goldichite associated with Coquimbite on mindat.org.
Römerite10 photos of Goldichite associated with Römerite on mindat.org.
Voltaite9 photos of Goldichite associated with Voltaite on mindat.org.
Halotrichite4 photos of Goldichite associated with Halotrichite on mindat.org.
Ferricopiapite3 photos of Goldichite associated with Ferricopiapite on mindat.org.
Copiapite2 photos of Goldichite associated with Copiapite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.CC.AndychristyitePbCu2+Te6+O5(H2O)Tric. 1 : P1
7.CC.05KrausiteKFe(SO4)2 · H2OMon. 2/m : P21/m
7.CC.10TamarugiteNaAl(SO4)2 · 6H2OMon. 2/m
7.CC.15KaliniteKAl(SO4)2 · 11H2OMon. 2/m : B2/b
7.CC.15MendoziteNaAl(SO4)2 · 11H2OMon. 2/m
7.CC.20Lonecreekite(NH4)Fe3+(SO4)2 · 12H2OIso.
7.CC.20Alum-(K)KAl(SO4)2 · 12H2OIso. m3 (2/m 3)
7.CC.20Alum-(Na)NaAl(SO4)2 · 12H2O
7.CC.20Tschermigite(NH4)Al(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.20LanmuchangiteTl+Al(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.25VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.25ZincovoltaiteK2Zn5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.25PertlikiteK2(Fe2+,Mg)2Mg4Fe3+2Al(SO4)12 · 18H2OTet. 4/mmm (4/m 2/m 2/m) : I41/acd
7.CC.25Ammoniomagnesiovoltaite(NH4)2Mg2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.30KröhnkiteNa2Cu(SO4)2 · 2H2OMon. 2/m : P21/b
7.CC.35FerrinatriteNa3Fe(SO4)3 · 3H2OTrig. 3 : P3
7.CC.45LöweiteNa12Mg7(SO4)13 · 15H2OTrig.
7.CC.50BlöditeNa2Mg(SO4)2 · 4H2OMon. 2/m
7.CC.50NickelblöditeNa2(Ni,Mg)(SO4)2 · 4H2O
7.CC.50ChangoiteNa2Zn(SO4)2 · 4H2OMon. 2/m : P21/b
7.CC.55LeoniteK2Mg(SO4)2 · 4H2OMon. 2/m
7.CC.55MereiteriteK2Fe(SO4)2 · 4H2OMon.
7.CC.60Boussingaultite(NH4)2Mg(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60CyanochroiteK2Cu(SO4)2 · 6H2OMon. 2/m
7.CC.60Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60Nickelboussingaultite(NH4)2Ni(SO4)2 · 6H2O
7.CC.60PicromeriteK2Mg(SO4)2 · 6H2OMon. 2/m
7.CC.65PolyhaliteK2Ca2Mg(SO4)4 · 2H2OTric. 1
7.CC.70LeightoniteK2Ca2Cu(SO4)4 · 2H2OTric.
7.CC.75AmarilliteNaFe(SO4)2 · 6H2OMon. 2/m : B2/b
7.CC.80KonyaiteNa2Mg(SO4)2 · 5H2OMon. 2/m : P21/b
7.CC.85WattevilleiteNa2Ca(SO4)2 · 4H2O (?)Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.11.1NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
25.11.2SideronatriteNa2Fe(SO4)2(OH) · 3H2OOrth. 2 2 2 : P21 21 21
25.11.3MetasideronatriteNa2Fe(SO4)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
25.11.4FerrinatriteNa3Fe(SO4)3 · 3H2OTrig. 3 : P3
25.11.5AmarilliteNaFe(SO4)2 · 6H2OMon. 2/m : B2/b
25.11.6YavapaiiteKFe(SO4)2Mon. 2/m : B2/m
25.11.7KrausiteKFe(SO4)2 · H2OMon. 2/m : P21/m
25.11.9JarositeKFe3+ 3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
25.11.10VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
25.11.11UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
25.11.12MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2OTrig.
25.11.13Sabieite(NH4)Fe3+(SO4)2Trig. 3 2 : P3 2 1
25.11.14Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
25.11.15Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2OTric.
25.11.16Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
25.11.17Lonecreekite(NH4)Fe3+(SO4)2 · 12H2OIso.
25.11.18Godovikovite(NH4)Al(SO4)2Trig. 3 2 : P3 2 1
25.11.19BotryogenMgFe3+(SO4)2(OH) · 7H2OMon. 2/m
25.11.21Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2OTrig. 3 : R3
25.11.23SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
25.11.24Millosevichite(Al,Fe)2(SO4)3Tric.
25.11.25AluminocopiapiteAl2/3Fe3+4(SO4)6(OH)2 · 20H2OTric. 1 : P1
25.11.26HalotrichiteFeAl2(SO4)4 · 22H2OMon. 2 : P2
25.11.27Idrizite(Mg,Fe)(Al,Fe)2(SO4)3(OH)2 · 15H2O or near
25.11.28LishizheniteZnFe2(SO4)4 · 14H2OTric. 1 : P1
25.11.29ZincovoltaiteK2Zn5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c

Other InformationHide

Notes:
Slightly soluble in cold water. Soluble in hot water with hydrolysis.
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 GoldichiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist: 40: 469-480.
American Mineralogist: 56: 1917-1933.

Internet Links for GoldichiteHide

Localities for GoldichiteHide

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.
Argentina
 
  • Jujuy
    • Santa Bárbara Department
      • Cerros de Santa Bárbara (Cerro Santa Bárbara)
        • El Palmar hot springs
http://rruff.geo.arizona.edu/doclib/hom/goldichite.pdf.; Zavalia, Maria Florencia Marquez & Galliski, Miguel Angel (1995): Goldichite of fumarolic origin from the Santa Barbara mine, Jujuy, northwestern Argentina. Canadian Mineralogist 33, 1059-1062.
Caribbean Netherlands
 
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
Chile
 
  • Antofagasta Region
    • El Loa Province
      • Calama
        • Cerritos Bayos
Samples analysed by Tony Kampf of LAC Mineralogical Museum, USA
  • Tarapacá Region
    • El Tamarugal Province
      • Pampa del Tamarugal
Peter G. Seroka collection
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Plaka
          • Plaka Mines
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (I). Mineralien-Welt 25 (1), 60-75 (in German).
Branko Rieck Collection
        • Sounion area
Branko Rieck Collection
Italy
 
  • Campania
    • Phlegrean Volcanic Complex
      • Naples Province
        • Phlegrean Fields
          • Pozzuoli
De Michele, V. (1974). Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol
Peru
 
  • Ayacucho Department
    • Lucanas Province
      • Huac-huas (Huacuas)
Roth, P. and Meisser, N. (2012) Goldichit: Ausgezeichnete Kristalle aur Peru. Lapis, 37, #5, 37.
Russia
 
  • Far-Eastern Region
    • Sakhalinskaya Oblast'
      • Kuril Islands (Kurile Islands)
        • Iturup Island
http://maurice.strahlen.org/kurilles/kurilles.htm
USA
 
  • Utah
    • Emery Co.
      • San Rafael District (San Rafael Swell)
        • Calf Mesa
UGMS Bull 117 Minerals and Mineral Localities of Utah
Amer.Min.(1955) 40, 469-480; Min Rec 19:331-338
Mineral and/or Locality  
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