Mineralogy Database

Mereiterite Mineral Data

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General Mereiterite Information

Help on Chemical  Formula: Chemical Formula: K2Fe++(SO4)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 398.23 gm
   Potassium  19.64 %  K    23.65 % K2O
   Iron       14.02 %  Fe   18.04 % FeO
   Hydrogen    2.02 %  H    18.10 % H2O
   Sulfur     16.10 %  S    40.21 % SO3
   Oxygen     48.21 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2Fe2+(SO4)2•4(H2O)
Help on Environment: Environment: In a pocket in marble.
Help on IMA Status: IMA Status: Approved IMA 1995, Dana # Changed (
Help on Locality: Locality: The D-level of the Hilarion adit, Agios Konstadinos, Lavrion Mining District, Greece. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Dr. Kurt Mereiter (1945- ), Technical University of Vienna, Austria.
Help on Name Pronunciation: Name Pronunciation: Mereiterite + Pronunciation Say MEREITERITE
Help on Synonym: Synonym: Dana
  ICSD 79854
  PDF 46-1437

Mereiterite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2395:1:1.0407
Help on Cell Dimensions: Cell Dimensions: a = 11.841, b = 9.553, c = 9.942, Z = 4; beta = 94.9° V = 1,120.50 Den(Calc)= 2.36
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.444(1), 3.505(0.52), 2.39(0.49),

Physical Properties of Mereiterite

Help on Cleavage: Cleavage: None
Help on Color: Color: Pale yellow.
Help on Density: Density: 2.36
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white

Optical Properties of Mereiterite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2129,KPDmeas= 0.2129,KC= 0.213
Ncalc = 1.5
Help on Optical Data: Optical Data: Biaxial (+), a=1.497, b=1.501, g=1.509, bire=0.0120, 2V(Calc)=72, 2V(Meas)=73. Dispersion very weak, r > v.

Calculated Properties of Mereiterite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.37 gm/cc
note: Specific Gravity of Mereiterite =2.36 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0044388608
Boson Index = 0.9955611392
Help on Photoelectric: Photoelectric: PEMereiterite = 7.02 barns/electron
U=PEMereiterite x relectron= 16.64 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 284.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Mereiterite per GRapi unit = 0.35 (%)

Estimated Radioactivity from Mereiterite - barely detectable


Mereiterite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.03)where (A+)2 B (XO4)2 � x(H2O)
  (29.03.03)Blodite Group Blodite Na2Mg(SO4)2•4(H2O) P 21/a 2/m Nickelblodite Na2(Ni,Mg)(SO4)2•4(H2O) P 21/a 2/m Leonite K2Mg(SO4)2•4(H2O) C 2/m 2/m Mereiterite! K2Fe(SO4)2•4(H2O) C 2/m 2/m Changoite! Na2Zn(SO4)2•4(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 07.CC.55 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CC -With medium-sized and large cations
07.CC.55 Mereiterite! K2Fe(SO4)2•4(H2O) C 2/m 2/m
07.CC.55 Leonite K2Mg(SO4)2•4(H2O) C 2/m 2/m

Other Mereiterite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Mereiterite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 07.CC.55





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