Plumboferrite Mineral Data

Plumboferrite Mineral Data +

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General Plumboferrite Information

Chemical Formula:

Pb2Fe+++(11-x)Mn++xO19-2x (x=1/3)

Composition:

Molecular Weight = 1,314.19 gm

Magnesium 0.18 % Mg 0.31 % MgO

Manganese 0.84 % Mn 1.08 % MnO

Iron 45.05 % Fe 64.40 % Fe₂O₃

Lead 31.53 % Pb 33.97 % PbO

Oxygen 22.40 % O

______ ______

100.00 % 99.76 % = TOTAL OXIDE

Empirical Formula:

Pb₂Mn²⁺_0.2Mg_0.1Fe³⁺_10.6O_18.4

Environment:

In metamorphosed lead-bearing Fe-Mn orebodies. Occurs with jacobsite.

IMA Status:

Valid Species (Pre-IMA) 1881

Locality:

Jakobsberg, Nordmark, Sweden. Link to MinDat.org Location Data.

Name Origin:

From the Latin (PLUMum) for lead and FERROus iron in the composition.

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Plumboferrite Crystallography

Axial Ratios:

a:c = 1:3.97083

Cell Dimensions:

a = 5.931, c = 23.551, Z = 2; V = 717.46 Den(Calc)= 6.08

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 2.9438(1), 3.922(0.85), 2.8132(0.3),

Crystal Structure:

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Holtstam D , Norrestam R , Sjodin A , American Mineralogist , 80 (1995) p.1065-1072, Plumboferrite: New mineralogical data and atomic arrangement

Physical Properties of Plumboferrite

Cleavage:

[0001] Good

Color:

Black.

Density:

Diaphaniety:

Opaque

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

5 - Apatite

Luster:

Metallic

Streak:

dark reddish black

Optical Properties of Plumboferrite

Optical Data:

Uniaxial (-).

NCalc= 2.52 - from Gladstone-Dale relationship (KC = 0.2508) where Ncalc=Dcalc*KC+1
NCalc= 2.5 - from Gladstone-Dale relationship (KC = 0.2508) where Ncalc=Dmeas*KC+1

RL Bireflectance:

Weak.

RL Color:

Light gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Plumboferrite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	27.30	29.40
420 nm	26.90	28.70
440 nm	26.50	28.00
460 nm	26.10	27.50
480 nm	25.80	26.90
500 nm	25.50	26.40
520 nm	25.20	25.90
540 nm	24.90	25.50
560 nm	24.60	25.00
580 nm	24.10	24.60
600 nm	23.60	24.00
620 nm	23.10	23.50
640 nm	22.60	23.00
660 nm	22.20	22.60
680 nm	21.80	22.10
700 nm	21.40	21.70

**Calculated Relative Intensity Colors of Plumboferrite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	360%	380%
R₁
R₂

Calculated Properties of Plumboferrite

Electron Density:

r_electron=5.49 gm/cc
note: r_{Plumboferrite}=6.08 gm/cc.

Fermion Index

Fermion Index = 0.07952
Boson Index = 0.92048

Photoelectric:

PE_{Plumboferrite}= 551.13 barns/electron
U=PE_{Plumboferrite} x r_electron=3,024.02 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Plumboferrite is Not Radioactive

Plumboferrite Classification

Dana Class:

7.11.5.1 (7)Multiple Oxides

(7.11)as titano-oxides with [4] and [6] substitutions

(7.11.5)Dana Group

7.11.5.1 Plumboferrite Pb2Fe(11-x)MnxO19-2x(x=1/3) P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

IV/C.08-50 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.08 - Yimngite - Otjisumeite series

IV/C.08-10 Yimengite K(Cr,Ti,Fe,Mg)12O19 P 6₃/mmc 6/m 2/m 2/m

IV/C.08-20 Hawthorneite Ba[Ti3Cr4Fe4Mg]O19 P 6₃/mmc 6/m 2/m 2/m

IV/C.08-22 Haggertyite! Ba[Fe6Ti5Mg]O19 P 6₃/mmc 6/m 2/m 2/m

IV/C.08-25 Batiferrite! Ba(Ti2Fe8Fe2)O19 P 6₃/mmc 6/m 2/m 2/m

IV/C.08-30 Hibonite (Ca,Ce)(Al,Ti,Mg)12O19 P 6₃/mmc 6/m 2/m 2/m

IV/C.08-35 Nezilovite! PbZn2(Mn,Ti)2Fe8O19 P 6₃/mmc 6/m 2/m 2/m

IV/C.08-40 Magnetoplumbite Pb(Fe,Mn)12O19 P 6₃/mmc 6/m 2/m 2/m

IV/C.08-45 Zenzenite Pb3(Fe,Mn)4Mn3O15 P 6₃/mcm 6/m 2/m 2/m

IV/C.08-47 Lindqvistite Pb2(Mn,Mg)Fe16027 P 6₃/mmc 6/m 2/m 2/m

IV/C.08-50 Plumboferrite Pb2Fe(11-x)MnxO19-2x(x=1/3) P 6₃/mmc 6/m 2/m 2/m

IV/C.08-60 Bartelkeite PbFeGe3O8 P 2₁,P 2₁/m Mono

IV/C.08-70 Otjisumeite PbGe4O9 P1,P 1 Tri

Other Plumboferrite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Plumboferrite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 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 12 -École des Mines de Paris

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Plumboferrite

Pb2Fe+++(11-x)Mn++xO19-2x (x=1/3)
Dana No: 7.11.5.1 Strunz No: IV/C.08-50
Locality:

Notes: