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Mereiterite

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Dr. Kurt Mereiter
Formula:
K2Fe(SO4)2 · 4H2O
System:
Monoclinic
Colour:
Pale yellow
Lustre:
Vitreous, Greasy
Hardness:
2½ - 3
Member of:
Name:
Named after Prof. Dr. Kurt Mereiter, Technical University of Vienna, in honour of his contributions to the crystal chemistry of various iron sulfates.
The iron analogue of Leonite.

May possibly appear as a dehydration product of the (unstable at room temperature) picromerite-type hexahydrate (a Tutton salt).




Classification of Mereiterite

Approved
7.CC.55

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
28.4.3.3

28 : ANHYDROUS ACID AND NORMAL SULFATES
4 : Miscellaneous

Physical Properties of Mereiterite

Vitreous, Greasy
Colour:
Pale yellow
Streak:
White
Hardness (Mohs):
2½ - 3

Optical Data of Mereiterite

Type:
Biaxial (+)
RI values:
nα = 1.497 nβ = 1.501 nγ = 1.509
2V:
Measured: 73° , Calculated: 72°
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
very weak

Chemical Properties of Mereiterite

Formula:
K2Fe(SO4)2 · 4H2O
IMA Formula:
K2Fe2+(SO4)2 · 4H2O
Elements listed in formula:

Crystallography of Mereiterite

Crystal System:
Monoclinic
Cell Parameters:
a = 11.84 Å, b = 9.55 Å, c = 9.94 Å
β = 94.87°
Ratio:
a:b:c = 1.24 : 1 : 1.041
Unit Cell Volume:
V 1,119.88 ų (Calculated from Unit Cell)

Type Occurrence of Mereiterite

Relationship of Mereiterite to other Species

Member of:
Other Members of Group:
LeoniteK2Mg(SO4)2 · 4H2O
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.40GoldichiteKFe(SO4)2 · 4H2O
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.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 (?)

Other Names for Mereiterite

Name in Other Languages:

Other Information

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 Mereiterite

Reference List:
Mineralogical Record: 27: 304.

European Journal of Mineralogy (1995): 7: 559-566.

Internet Links for Mereiterite

mindat.org URL:
https://www.mindat.org/min-2649.html
Please feel free to link to this page.

Localities for Mereiterite

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.
Greece (TL)
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
            • Hilarion area
Giester, G; Rieck, B: Mereiterite, K2Fe[SO4]2•4H2O, a new leonite-type mineral from the Lavrion mining district, Greece. European Journal of Mineralogy 7 (1995), 559-566 [MinRec 27:304]
Nicaragua
 
  • León Department
Hynek, B. M., McCollom, T. M., Marcucci, E. C., Brugman, K., & Rogers, K. L. (2013). Assessment of environmental controls on acid‐sulfate alteration at active volcanoes in Nicaragua: Applications to relic hydrothermal systems on Mars. Journal of Geophysical Research: Planets, 118(10), 2083-2104.
Mineral and/or Locality  
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