Meurigite-Na Mineral Data (original) (raw)
General Meurigite-Na Information
Chemical Formula:
[Na(H2O)2.5][Fe+++8(PO4)6(OH)7(H2O)4]
Composition:
Molecular Weight = 1,239.22 gm
Potassium 0.28 % K 0.34 % K2O
Sodium 1.60 % Na 2.15 % Na2O
Calcium 0.16 % Ca 0.23 % CaO
Magnesium 0.02 % Mg 0.03 % MgO
Aluminum 2.87 % Al 5.43 % Al2O3
Vanadium 0.49 % V 0.88 % V2O5
Iron 29.88 % Fe 42.72 % Fe2O3
Copper 0.21 % Cu 0.26 % CuO
Phosphorus 14.40 % P 32.99 % P2O5
Hydrogen 1.68 % H 14.97 % H2O
Oxygen 48.42 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Na0.86K0.09Ca0.05(H2O)1.9(H3O)0.6Fe3+6.63Al1.32Cu0.04Mg0.016(P0.96)6(V5+0.02)6(O4) (OH)7�4(H2O)
Environment:
Occurs very late in a paragenetic sequence of secondary minerals in a sulfide mine. Meurigite group.
IMA Status:
Approved IMA 2007 (Dana # Added)
Locality:
Silver Coin mine, Valmy, Iron Point district, Humboldt County, Nevada, USA. Link to MinDat.org Location Data.
Name Origin:
Named as the Na analog of meurigite-K.
Name Pronunciation:
Meurigite-Na + Pronunciation 
Synonym:
IMA2007-024
Meurigite-Na Image
Images:
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Meurigite-Na Comments: B&W image of sprays of meurigite-Na with turquoise, intergrown kidwellite/lipscombite, and crandallite on goethite. (AmMin, v94:720). Location: Silver Coin mine, Valmy, Iron Point district, Humboldt County, Nevada, USA.Scale: Largest Spray = 1 mm. © American Mineralogist |
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Images:
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Meurigite-Na Comments: SEM image of meurigite-Na crystals. (AmMin, v94:720). Location: Silver Coin mine, Valmy, Iron Point district, Humboldt County, Nevada, USA.Scale: See Image. © American Mineralogist |
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Images:
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Meurigite-Na Comments: Pale pearly yellow platy Meurigite-Na crystals all over vuggy matrix. Location: Tom's Phosphate quarry, Kapunda, South Australia, Australia.Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix |
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Meurigite-Na Crystallography
Axial Ratios:
a:b:c =5.5614:1:3.7579
Cell Dimensions:
a = 28.835, b = 5.1848, c = 19.484, Z = 4; beta = 106.983° V = 2,785.90 Den(Calc)= 2.95
Crystal System:
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
X Ray Diffraction:
By Intensity(I/Io): 9.349(1), 3.206(0.4), 3.107(0.3),1.574(0.2), 4.318(0.2), 4.843(0.2), 13.8(0.2), 2.971(0.15),
Physical Properties of Meurigite-Na
Cleavage:
{001} Distinct
Color:
Cream, Pale yellow.
Density:
2.94
Diaphaneity:
Transparent
Fracture:
Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Habit:
Acicular - Occurs as needle-like crystals.
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:
3 - Calcite
Luster:
Silky
Streak:
white
Optical Properties of Meurigite-Na
Gladstone-Dale:
CI meas= 0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2556,KPDmeas= 0.2565,KC= 0.2658
Ncalc = 1.78
Optical Data:
Biaxial (-), a=1.74, b=1.759, g=1.763, bire=0.0230, 2V(Calc)=48, 2V(Meas)=50. Dispersion dispersion not observed.
Calculated Properties of Meurigite-Na
Electron Density:
Bulk Density (Electron Density)=2.91 gm/cc
note: Specific Gravity of Meurigite-Na =2.94 gm/cc.
Fermion Index:
Fermion Index = 0.0066036942
Boson Index = 0.9933963058
Photoelectric:
PEMeurigite-Na = 9.87 barns/electron
U=PEMeurigite-Na x relectron= 28.70 barns/cc.
Radioactivity:
GRapi = 4.05 (Gamma Ray American Petroleum Institute Units)
Concentration of Meurigite-Na per GRapi unit = 24.69 (%)
Estimated Radioactivity from Meurigite-Na 
- barely detectable
Meurigite-Na Classification
Dana Class:
42.12.06.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.12)with miscellaneous formulae
(42.12.06)Meurigite group
42.12.06.01 Meurigite-K! [K(H2O)2.5][Fe8(PO4)6(OH)7(H2O)4] C 2/c 2/m
42.12.06.02 Meurigite-Na! [Na(H2O)2.5][Fe8(PO4)6(OH)7(H2O)4] C 2/c 2/m
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-Na Information
References:
NAME( AmMin, v94:720) PHYS. PROP.(AmMin, v94:720) OPTIC PROP.(AmMin, v94:720)
See Also:
Links to other databases for Meurigite-Na :
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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Print or Cut-and-Paste your Meurigite-Na Specimen Label here :
Meurigite-Na
[Na(H2O)2.5][Fe+++8(PO4)6(OH)7(H2O)4]
Dana No: 42.12.06.02 Strunz No: 08.DJ.20
Locality:
Notes: