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Goldichite

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Samuel Stephen Goldich
Formula:
KFe(SO4)2 · 4H2O
System:
Monoclinic
Colour:
Pale yellowish green
Lustre:
Vitreous
Hardness:
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.


Classification of Goldichite

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 Goldichite

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

Optical Data of Goldichite

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 Goldichite

Formula:
KFe(SO4)2 · 4H2O
IMA Formula:
KFe3+(SO4)2 · 4H2O
Elements listed in formula:

Crystallography of Goldichite

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 Volume:
V 969.14 ų (Calculated from Unit Cell)
Z:
4

Crystallographic forms of Goldichite

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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Occurrences of Goldichite

Type Occurrence of Goldichite

Place of Conservation of Type Material:
Smithsonian Museum, Washington DC, USA
Empirical Formula:
KFe3+(SO4)2 · 4H2O

Relationship of Goldichite to other Species

7.CC.AndychristyitePbCu2+Te6+O5(H2O)
7.CC.05KrausiteKFe(SO4)2 · H2O
7.CC.10TamarugiteNaAl(SO4)2 · 6H2O
7.CC.15KaliniteKAl(SO4)2 · 11H2O Not confirmed
7.CC.15MendoziteNaAl(SO4)2 · 11H2O
7.CC.20Lonecreekite(NH4)Fe3+(SO4)2 · 12H2O
7.CC.20Alum-(K)KAl(SO4)2 · 12H2O
7.CC.20Alum-(Na)NaAl(SO4)2 · 12H2O
7.CC.20Tschermigite(NH4)Al(SO4)2 · 12H2O
7.CC.20LanmuchangiteTl+Al(SO4)2 · 12H2O
7.CC.25VoltaiteK2Fe52+Fe33+Al(SO4)12 · 18H2O
7.CC.25ZincovoltaiteK2Zn5Fe33+Al(SO4)12 · 18H2O
7.CC.25PertlikiteK2(Fe2+,Mg)2Mg4Fe23+Al(SO4)12 · 18H2O
7.CC.25Ammoniomagnesiovoltaite(NH4)2Mg52+Fe33+Al(SO4)12 · 18H2O
7.CC.30KröhnkiteNa2Cu(SO4)2 · 2H2O
7.CC.35FerrinatriteNa3Fe(SO4)3 · 3H2O
7.CC.45LöweiteNa12Mg7(SO4)13 · 15H2O
7.CC.50BlöditeNa2Mg(SO4)2 · 4H2O
7.CC.50NickelblöditeNa2(Ni,Mg)(SO4)2 · 4H2O
7.CC.50ChangoiteNa2Zn(SO4)2 · 4H2O
7.CC.50ZincblöditeNa2Zn(SO4)2 · 4H2O
7.CC.55LeoniteK2Mg(SO4)2 · 4H2O
7.CC.55MereiteriteK2Fe(SO4)2 · 4H2O
7.CC.60Boussingaultite(NH4)2Mg(SO4)2 · 6H2O
7.CC.60CyanochroiteK2Cu(SO4)2 · 6H2O
7.CC.60Mohrite(NH4)2Fe(SO4)2 · 6H2O
7.CC.60Nickelboussingaultite(NH4)2Ni(SO4)2 · 6H2O
7.CC.60PicromeriteK2Mg(SO4)2 · 6H2O
7.CC.65PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
7.CC.70LeightoniteK2Ca2Cu(SO4)4 · 2H2O
7.CC.75AmarilliteNaFe(SO4)2 · 6H2O
7.CC.80KonyaiteNa2Mg(SO4)2 · 5H2O
7.CC.85WattevilleiteNa2Ca(SO4)2 · 4H2O (?)
25.11.1NatrojarositeNaFe3(SO4)2(OH)6
25.11.2SideronatriteNa2Fe(SO4)2(OH) · 3H2O
25.11.3MetasideronatriteNa2Fe(SO4)2(OH) · H2O
25.11.4FerrinatriteNa3Fe(SO4)3 · 3H2O
25.11.5AmarilliteNaFe(SO4)2 · 6H2O
25.11.6YavapaiiteKFe(SO4)2
25.11.7KrausiteKFe(SO4)2 · H2O
25.11.9JarositeKFe3+ 3(SO4)2(OH)6
25.11.10VoltaiteK2Fe52+Fe33+Al(SO4)12 · 18H2O
25.11.11UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2O
25.11.12MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2O
25.11.13Sabieite(NH4)Fe3+(SO4)2
25.11.14Ammoniojarosite(NH4)Fe33+(SO4)2(OH)6
25.11.15Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2O
25.11.16Mohrite(NH4)2Fe(SO4)2 · 6H2O
25.11.17Lonecreekite(NH4)Fe3+(SO4)2 · 12H2O
25.11.18Godovikovite(NH4)Al(SO4)2
25.11.19BotryogenMgFe3+(SO4)2(OH) · 7H2O
25.11.21Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2O
25.11.23SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2O
25.11.24Millosevichite(Al,Fe)2(SO4)3
25.11.25AluminocopiapiteAl2/3Fe43+(SO4)6(OH)2 · 20H2O
25.11.26HalotrichiteFeAl2(SO4)4 · 22H2O
25.11.27Idrizite(Mg,Fe)(Al,Fe)2(SO4)3(OH)2 · 15H2O or near
25.11.28LishizheniteZnFe2(SO4)4 · 14H2O
25.11.29ZincovoltaiteK2Zn5Fe33+Al(SO4)12 · 18H2O

Other Names for Goldichite

Name in Other Languages:

Other Information

Other Information:
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 Goldichite

Reference List:
American Mineralogist: 40: 469-480.

American Mineralogist: 56: 1917-1933.

Internet Links for Goldichite

mindat.org URL:
https://www.mindat.org/min-1722.html
Please feel free to link to this page.

Localities for Goldichite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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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