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Mereiterite

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Lavrion District Mines, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece
© Fritz Schreiber

Show Mereiterite Photos (2)



Formula:
K
 
2
Fe(SO
 
4
)
 
2
 · 4H
 
2
O
System:MonoclinicColour:Pale yellow
Lustre:Vitreous, GreasyHardness:2½ - 3
Member of:Leonite Group


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

IMA status:Approved
Strunz 8th edition ID:6/C.18-35
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:28.4.3.3

28 : ANHYDROUS ACID AND NORMAL SULFATES
4 : Miscellaneous
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Type Occurrence of Mereiterite

Type Locality:Hilarion Mine (Hilarion adit; Hilarion Mine No. 50), Hilarion area, Kamariza Mines (Kamareza Mines), Agios Konstantinos [St Constantine] (Kamariza), Lavrion District Mines, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece
Year of Discovery:1995

Physical Properties of Mereiterite

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

Crystallography of Mereiterite

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

Optical Data of Mereiterite

Type:Biaxial (+)
RI values: nα = 1.497 nβ = 1.501 nγ = 1.509
2V:Measured: 73° , Calculated: 72°
Maximum Birefringence:δ = 0.012

Chart 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:
K
 
2
Fe(SO
 
4
)
 
2
 · 4H
 
2
O
Essential elements:Fe, H, K, O, S
All elements listed in formula:Fe, H, K, O, S

Relationship of Mereiterite to other Species

Member of:Leonite Group
Other Members of Group:

- +
Leonite
K
 
2
Mg(SO
 
4
)
 
2
 · 4H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
7.CC.05Krausite
KFe(SO
 
4
)
 
2
 · H
 
2
O
7.CC.10Tamarugite
NaAl(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.15Kalinite
KAl(SO
 
4
)
 
2
 · 11H
 
2
O Not confirmed
7.CC.15Mendozite
NaAl(SO
 
4
)
 
2
 · 11H
 
2
O
7.CC.20Lonecreekite
(NH
 
4
)Fe
3+
 
(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Alum-(K)
KAl(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Alum-(Na)
NaAl(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Tschermigite
(NH
 
4
)Al(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Lanmuchangite
Tl
+
 
Al(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.25Voltaite
K
 
2
Fe
2+
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.25Zincovoltaite
K
 
2
Zn
 
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.25Pertlikite
K
 
2
(Fe
2+
 
,Mg)
 
2
Mg
 
4
Fe
3+
2
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.25Ammoniomagnesiovoltaite
(NH
 
4
)
 
2
Mg
2+
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.30Kröhnkite
Na
 
2
Cu(SO
 
4
)
 
2
 · 2H
 
2
O
7.CC.35Ferrinatrite
Na
 
3
Fe(SO
 
4
)
 
3
 · 3H
 
2
O
7.CC.40Goldichite
KFe(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.45Löweite
Na
 
12
Mg
 
7
(SO
 
4
)
 
13
7.CC.50Blödite
Na
 
2
Mg(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.50Nickelblödite
Na
 
2
(Ni,Mg)(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.50Changoite
Na
 
2
Zn(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.50Zincblödite
7.CC.55Leonite
K
 
2
Mg(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.60Boussingaultite
(NH
 
4
)
 
2
Mg(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Cyanochroite
K
 
2
Cu(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Mohrite
(NH
 
4
)
 
2
Fe(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Nickelboussingaultite
(NH
 
4
)
 
2
Ni(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Picromerite
K
 
2
Mg(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.65Polyhalite
K
 
2
Ca
 
2
Mg(SO
 
4
)
 
4
 · 2H
 
2
O
7.CC.70Leightonite
K
 
2
Ca
 
2
Cu(SO
 
4
)
 
4
 · 2H
 
2
O
7.CC.75Amarillite
NaFe(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.80Konyaite
Na
 
2
Mg(SO
 
4
)
 
2
 · 5H
 
2
O
7.CC.85Wattevilleite
Na
 
2
Ca(SO
 
4
)
 
2
 · 4H
 
2
O (?)

Other Names for Mereiterite

Synonyms:
IMA1993-045
Other Languages:
German:Mereiterit
Russian:Мерейтерит
Spanish:Mereiterita

Other Information

Health Warning: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

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mereiterite details from Handbook of Mineralogy (PDF)
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    • Localities for Mereiterite

    Hide Locality List
    (TL) indicates type locality. ? 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
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
            • Kamariza Mines (Kamareza Mines)
              • Hilarion area
    		[MinRec 27:304]
    Mineral and/or Locality
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