Pyrophanite Mineral Data

General Pyrophanite Information

Chemical Formula:

MnTiO3

Composition:

Molecular Weight = 150.82 gm

Titanium 31.75 % Ti 52.96 % TiO₂

Manganese 36.43 % Mn 47.04 % MnO

Oxygen 31.83 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺TiO₃

Environment:

Principally in metamorphosed manganese deposits, less commonly as an accessory mineral in granite, amphibolite, and serpentinites.

IMA Status:

Valid Species (Pre-IMA) 1890

Locality:

Jartstig mine, Pajsberg, Hear Persberg, Vermland, Sweden. Link to MinDat.org Location Data.

Name Origin:

From the Greek pyr - "fire" and fanos - "shining."

Name Pronunciation:

Pyrophanite + Pronunciation

Synonym:

ICSD 6006

PDF 29-902

Pyrophanite Image

Images:

Pyrophanite

Comments: Red-brown platy pyrophanite crystals with deep red internal hints, associated with barite.
Location: Harstigen Mine, Pajsberg, Filipstad, VÃ¤rmland, Sweden. Scale: See Image.
© Rruff Database

Pyrophanite Crystallography

Axial Ratios:

a:c = 1:2.78177

Cell Dimensions:

a = 5.137, c = 14.29, Z = 6; V = 326.57 Den(Calc)= 4.60

Crystal System:

Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 2.78(1), 2.57(0.9), 1.745(0.8),

Physical Properties of Pyrophanite

Cleavage:

{0221} Perfect

Color:

Blood red, Green yellow, Dark red.

Density:

4.5 - 4.53, Average = 4.51

Diaphaneity:

Subtranslucent to opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Scaly - Morphology like fish scales.

Hardness:

5 - Apatite

Luster:

Sub Metallic

Streak:

ochre yellow

Optical Properties of Pyrophanite

Dichroism (e):

orange.

Dichroism (w):

orange.

Gladstone-Dale:

CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2924,KPDmeas= 0.2979,KC= 0.3008
Ncalc = 2.35 - 2.38

Optical Data:

Uniaxial (-), e=2.21, w=2.48, bire=0.2700.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Pyrophanite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	23.50	19.90
420 nm	22.70	19.60
440 nm	21.80	18.90
460 nm	21.10	18.20
480 nm	20.40	17.60
500 nm	19.90	17.10
520 nm	19.40	16.70
540 nm	19.00	16.30
560 nm	18.80	16.10
580 nm	18.50	15.90
600 nm	18.30	15.70
620 nm	18.20	15.60
640 nm	18.00	15.50
660 nm	17.80	15.40
680 nm	17.80	15.30
700 nm	17.60	15.20

**Calculated Relative Intensity Colors of Pyrophanite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%	550%
R₁
R₂

Calculated Properties of Pyrophanite

Electron Density:

Bulk Density (Electron Density)=4.25 gm/cc
note: Specific Gravity of Pyrophanite =4.52 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Pyrophanite= 14.91 barns/electron
U=PE_Pyrophanite x rElectron Density= 63.38 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pyrophanite is Not Radioactive

Pyrophanite Classification

Dana Class:

04.03.05.03 (04)Simple Oxides

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

(04.03.05)Ilmenite Group

04.03.05.01 Ilmenite FeTiO3 R 3 3

04.03.05.02 Geikielite MgTiO3 R 3 3

04.03.05.03 Pyrophanite MnTiO3 R 3 3

04.03.05.04 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3

04.03.05.05 Melanostibite Mn(Sb,Fe)O3 R 3 3

04.03.05.06 Brizziite-III NaSbO3 R 3 3

04.03.05.07 Akimotoite! (Mg,Fe)SiO3 R 3 3

Strunz Class:

04.CB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.C - Metal:Oxygen = 2:3, 3:5, and Similar

04.CB -With medium-sized cations

04.CB.05 Auroantimonate* AuSbO3 Ortho ? Ortho

04.CB.05 Geikielite MgTiO3 R 3 3

04.CB.05 Brizziite-III NaSbO3 R 3 3

04.CB.05 Brizziite-VII NaSbO3 R 3 3

04.CB.05 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3

04.CB.05 Corundum Al2O3 R 3c 3 2/m

04.CB.05 Eskolaite Cr2O3 R 3c 3 2/m

04.CB.05 Hematite Fe2O3 R 3c 3 2/m

04.CB.05 Karelianite V2O3 R 3c 3 2/m

04.CB.05 Ilmenite FeTiO3 R 3 3

04.CB.05 Melanostibite Mn(Sb,Fe)O3 R 3 3

04.CB.05 Pyrophanite MnTiO3 R 3 3

04.CB.05 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig

04.CB.05 Tistarite! Ti2O3 R 3c 3 2/m

Other Pyrophanite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Pyrophanite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - Franklin Minerals(Dunn)
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - University of Colorado - Mineral Structure Data
19 - WWW-MINCRYST

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Print or Cut-and-Paste your Pyrophanite Specimen Label here :

Pyrophanite

MnTiO3
Dana No: 04.03.05.03 Strunz No: 04.CB.05
Locality:

Notes:

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