Macedonite Mineral Data

Macedonite Mineral Data +

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General Macedonite Information

Chemical Formula:

PbTiO3

Composition:

Molecular Weight = 303.08 gm

Titanium 15.80 % Ti 26.36 % TiO₂

Lead 68.37 % Pb 73.64 % PbO

Oxygen 15.84 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbTiO₃

Environment:

Rare secondary mineral in microcline-quartz syenite pegmatite veins.

IMA Status:

Approved IMA 1971

Locality:

Crni Kamen, near Prilep, Macedonia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 61168

PDF 6-452

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Macedonite Crystallography

Axial Ratios:

a:c = 1:1.08228

Cell Dimensions:

a = 3.889, c = 4.209, Z = 1; V = 63.66 Den(Calc)= 7.91

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mmm

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

By Intensity(I/I_o): 2.843(1), 1.603(0.9), 2.728(0.8),

Physical Properties of Macedonite

Cleavage:

None

Color:

Black.

Density:

7.82

Diaphaniety:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

yellow gray

Optical Properties of Macedonite

Dichroism (e):

brownish yellow.

Dichroism (w):

brownish greenish yellow.

Optical Data:

Uniaxial (?).

NCalc= 2.59 - from Gladstone-Dale relationship (KC = 0.2015) where Ncalc=Dcalc*KC+1
NCalc= 2.58 - from Gladstone-Dale relationship (KC = 0.2015) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Very weak.

RL Color:

Grayish white with yellow brown to dark brownish green interanal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Macedonite in Air**
λ	R	∑ R(λ)
470 nm	22.50
490 nm	22.20
510 nm	21.80
530 nm	21.20
546 nm	21.00
570 nm	20.90
589 nm	20.80
610 nm	20.60
630 nm	20.40
650 nm	20.20

**Calculated Relative Intensity Colors of Macedonite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	430%
R

Calculated Properties of Macedonite

Electron Density:

r_electron=6.68 gm/cc
note: r_Macedonite=7.91 gm/cc.

Fermion Index

Fermion Index = 0.17158
Boson Index = 0.82842

Photoelectric:

PE_Macedonite=1,245.44 barns/electron
U=PE_Macedonite x r_electron=8,321.19 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Macedonite is Not Radioactive

Macedonite Classification

Dana Class:

4.3.6.1 (4)Simple Oxides

(4.3)with a cation charge of 3+ (A+++2 O3)

(4.3.6)Dana Group

4.3.6.1 Macedonite PbTiO3 P 4/mmm 4/m 2/m 2/m

Strunz Class:

IV/C.10-80 IV - Oxides

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

IV/C.10 - Perowskite series

IV/C.10-10 Uhligite Ca3(Ti,Al,Zr)9O20 Unk Cubic

IV/C.10-20 Perovskite CaTiO3 P nma 2/m 2/m 2/m

IV/C.10-30 Latrappite (Ca,Na)(Nb,Ti,Fe)O3 Pcmn 2/m 2/m 2/m

IV/C.10-40 Tausonite SrTiO3 P m3m 4/m 3 2/m

IV/C.10-50 Loparite-(Ce) (Ce,Na,Ca)2(Ti,Nb)2O6 P m3m 4/m 3 2/m

IV/C.10-55 Isolueshite! (Na,La,Ca)(Nb,Ti)O3 P m3m 4/m 3 2/m

IV/C.10-60 Lueshite NaNbO3 P 222₁ 2 2 2

IV/C.10-70 Natroniobite NaNbO3 Mono

IV/C.10-80 Macedonite PbTiO3 P 4/mmm 4/m 2/m 2/m

Other Macedonite Information

References:

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

See Also:

Links to other databases for Macedonite :
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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Macedonite

PbTiO3
Dana No: 4.3.6.1 Strunz No: IV/C.10-80
Locality:

Notes: