Meurigite Mineral Data

Meurigite Mineral Data +

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General Meurigite Information

Chemical Formula:

KFe+++7(PO4)5(OH)7·8(H2O)

Composition:

Molecular Weight = 1,168.06 gm

Potassium 3.35 % K 4.03 % K₂O

Iron 33.47 % Fe 47.85 % Fe₂O₃

Phosphorus 13.26 % P 30.38 % P₂O₅

Hydrogen 1.98 % H 17.74 % H₂O

Oxygen 47.94 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

KFe³⁺₇(PO₄)₅(OH)₇·8(H₂O)

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

Santa Rita copper mine at Silver City, New Mexico, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Sir John Meurig Thomas, British chemist

Synonym:

IMA1995-022

Meurigite Image

Images:

Meurigite

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

Images:

Meurigite

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

Images:

Meurigite

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 Crystallography

Axial Ratios:

a:b:c =5.6239:1:3.4787

Cell Dimensions:

a = 29.52, b = 5.249, c = 18.26, Z = 4; beta = 109.27° V = 2,670.88 Den(Calc)= 2.90

Crystal System:

MonoclinicSpace Group: C 2,Cm,C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.216(1), 4.84(0.9), 3.116(0.8),

Physical Properties of Meurigite

Cleavage:

[001] Good

Color:

White, Cream, Yellowish brown, Pale yellow, Canary yellow.

Density:

2.96

Diaphaniety:

Translucent

Habit:

Spherical - Spherical, rounded aggregates.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3 - Calcite

Luster:

Silky

Streak:

pale yellowish white

Optical Properties of Meurigite

Gladstone-Dale:

CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2718,KPDmeas= 0.2663,KC= 0.2745

Optical Data:

Biaxial (+), a=1.78, b=1.785, g=1.8, bire=0.0200

Calculated Properties of Meurigite

Electron Density:

r_electron=2.88 gm/cc
note: r_Meurigite=2.90 gm/cc.

Fermion Index

Fermion Index = 0.00733
Boson Index = 0.99267

Photoelectric:

PE_Meurigite= 10.85 barns/electron
U=PE_Meurigite x r_electron= 31.21 barns/cc.

Radioactivity:

GRapi = 47.87 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Meurigite - barely detectable

Meurigite Classification

Dana Class:

42.12.6.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.12)with miscellaneous formulae

(42.12.6)Dana Group

42.12.6.1 Meurigite ! KFe7(PO4)5(OH)7·8(H2O) C 2,Cm,C 2/m Mono

Strunz Class:

VII/D.11-150 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.11 - Strunzite series

VII/D.11-10 Ferrostrunzite FeFe2(PO4)2(OH)2·6(H2O) P 1,P1 Tri

VII/D.11-20 Strunzite MnFe2(PO4)2(OH)2·6(H2O) P1 1

VII/D.11-30 Ferristrunzite FeFe2(PO4)2(OH)3·5(H2O) P1,P 1 Tri

VII/D.11-40 Bermanite MnMn2(PO4)2(OH)2·4(H2O) P 2₁ 2

VII/D.11-50 Cacoxenite (Fe,Al)25(PO4)17O6(OH)12·75(H2O) P 6/mmm 6/m 2/m 2/m

VII/D.11-60 Tinticite Fe5(PO4,VO4)4·7(H2O) P1 1

VII/D.11-70 Beraunite FeFe5(PO4)4(OH)5·4(H2O) C 2/c 2/m

VII/D.11-71 Oxiberaunite* (Fe,Mn)Fe5(PO4)4O(OH)4·6(H2O) Mono

VII/D.11-90 Souzalite (Mg,Fe)3(Al,Fe)4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

VII/D.11-100 Gormanite Fe3Al4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

VII/D.11-110 Dufrenite FeFe4(PO4)3(OH)5·2(H2O) C 2/c 2/m

VII/D.11-120 Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12·4(H2O) C 2/c 2/m

VII/D.11-130 Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6·2(H2O) C 2/c 2/m

VII/D.11-135 Ercitite! Na(Mn,Fe)(PO4)(OH)·2(H2O) P 2₁/n 2/m

VII/D.11-140 Kidwellite Na(Fe,Cu)9x(PO4)6(OH)11·3(H2O) P 2/c 2/m

VII/D.11-150 Meurigite KFe7(PO4)5(OH)7·8(H2O) C 2,Cm,C 2/m Mono

Other Meurigite Information

References:

NAME( Lapis) PHYS. PROP.(Min.Mag.,Vol.60,p787,1996) OPTIC PROP.(Min.Mag.,Vol.60,p787,1996)

See Also:

Links to other databases for Meurigite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Meurigite

KFe+++7(PO4)5(OH)7·8(H2O)
Dana No: 42.12.6.1 Strunz No: VII/D.11-150
Locality:

Notes: