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Meurigite-K Mineral Data

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General Meurigite-K Information

Help on Chemical  Formula: Chemical Formula: [K(H2O)2.5][Fe+++8(PO4)6(OH)7(H2O)4]
Help on Composition: Composition: Molecular Weight = 1,258.57 gm
   Potassium    2.83 %  K     3.41 % K2O
   Sodium       0.05 %  Na    0.07 % Na2O
   Aluminum     0.36 %  Al    0.69 % Al2O3
   Iron        33.37 %  Fe   47.71 % Fe2O3
   Copper       0.15 %  Cu    0.19 % CuO
   Phosphorus  13.49 %  P    30.90 % P2O5
   Hydrogen     1.82 %  H    16.30 % H2O
   Carbon       0.20 %  C     0.73 % CO2
   Oxygen      47.72 %  O
              ______        ______ 
              100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.91Na0.03(H2O)2.56Fe3+7.52Al0.17Cu0.03(PO4)5.48(CO3)0.21(OH)7.2(H2O)5.23
Help on Environment: Environment: Renamed 2007 to meurigite-K because of the approval of meuigite-Na (2007)
Help on IMA Status: IMA Status: Approved IMA 1995 (Dana # Added), Renamed IMA 2007
Help on Locality: Locality: Santa Rita copper mine at Silver City, New Mexico, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Sir John Meurig Thomas, British chemist and potassium in formula.
Help on Name Pronunciation: Name Pronunciation: Meurigite-K + Pronunciation Say MEURIGITE-K
Help on Synonym: Synonym: IMA1995-022

Meurigite-K Image

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Comments: Brown meuirite-K oolite showing the concentric-fibrous internal structure.
Location: Rengersdorf, Görlitz, Oberlausitz, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

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Comments: Yellow, radial acicular sprays of meurigite to about 0.75 mm.
Location: Teskov quarry, near Prague, Bohemia, Czech Republic. Scale: Picture size 1.5 cm.
© Tom Loomis / Dakota Matrix

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Comments: Yellow-green spheroidal crystals of meurigite to 0.1mm, in a 5mm vug in black rockbridgeite(?) matrix.
Location: Hagendorf Sud Pegmatite, Oberpfalz, Bavaria, Germany. Scale: Picture size 1.2 cm.
© Tom Loomis / Dakota Matrix

Meurigite-K Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =5.5922:1:3.7955
Help on Cell Dimensions: Cell Dimensions: a = 29.018, b = 5.189, c = 19.695, Z = 4; beta = 106.987° V = 2,836.18 Den(Calc)= 2.95
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.216(1), 4.84(0.9), 3.116(0.8),

Physical Properties of Meurigite-K

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: White, Cream, Yellowish brown, Pale yellow, Canary yellow.
Help on Density: Density: 2.96
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Silky
Help on Streak: Streak: pale yellowish white

Optical Properties of Meurigite-K

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.019 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2672,KPDmeas= 0.2663,KC= 0.2724
Ncalc = 1.8 - 1.81
Help on Optical Data: Optical Data: Biaxial (+), a=1.78, b=1.785, g=1.8, bire=0.0200

Calculated Properties of Meurigite-K

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Meurigite-K =2.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0073314294
Boson Index = 0.9926685706
Help on Photoelectric: Photoelectric: PEMeurigite-K = 10.88 barns/electron
U=PEMeurigite-K x relectron= 31.75 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 40.39 (Gamma Ray American Petroleum Institute Units)
Concentration of Meurigite-K per GRapi unit = 2.48 (%)

Estimated Radioactivity from Meurigite-K - barely detectable


Meurigite-K Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.12)with miscellaneous formulae
  (42.12.06)Meurigite group Meurigite-K! [K(H2O)2.5][Fe8(PO4)6(OH)7(H2O)4] C 2/c 2/m Meurigite-Na! [Na(H2O)2.5][Fe8(PO4)6(OH)7(H2O)4] C 2/c 2/m
Help on  Strunz Class: Strunz Class: 08.DJ.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DJ -With large and medium-sized cations, (OH, etc.):RO4 = 1:l
08.DJ.20 Meurigite-K! [K(H2O)2.5][Fe8(PO4)6(OH)7(H2O)4] C 2/c 2/m
08.DJ.20 Phosphofibrite KCuFe15(PO4)12(OH)12•12(H2O) Pbmn,Pnmn 2/m 2/m 2/m
08.DJ.20 Meurigite-Na! [Na(H2O)2.5][Fe8(PO4)6(OH)7(H2O)4] C 2/c 2/m

Other Meurigite-K Information

Help on References: References: NAME( Lapis) PHYS. PROP.(Min.Mag.,60:787, AmMin v92:1518) OPTIC PROP.(Min.Mag.,Vol.60,p787,1996)
Help on See Also: See Also: Links to other databases for Meurigite-K :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.DJ.20





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