Romanite Mineral Data

General Romanite Information

Chemical Formula:

(Fe++,U,Pb)2(Ti,Fe+++)O4

Composition:

Molecular Weight = 365.14 gm

Uranium 39.11 % U 44.37 % UO₂

Titanium 9.83 % Ti 16.41 % TiO₂

Iron 22.18 % Fe 23.61 % FeO / 5.47 % Fe₂O₃

Lead 11.35 % Pb 12.23 % PbO

Oxygen 17.53 % O

______ ______

100.00 % 102.08 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_1.2U_0.6Pb_0.2Ti_0.75Fe³⁺_0.25O₄

IMA Status:

Not Submitted IMA

Locality:

Romania. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Romanite Image

Images:

Romanite

Comments: Black, massive coarse-grained aggregate of romanite from amphibolites and its radioactivity is 335 µR/h.
Location: Dzhigda U ore occurrence, Dambuki ore cluster, Amurskaya Oblast', Far-Eastern Region, Russia. Scale: Specimen Size 3x2x1.8 cm.
© Pavel M. Kartashov

Romanite Crystallography

Crystal System:

Trigonal Space Group: Trig ?

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

By Intensity(I/I_o): 1.44(0.9), 2.84(0.9), 1.69(0.85),

Physical Properties of Romanite

Color:

Gray, Black.

Density:

4.07 - 4.46, Average = 4.26

Diaphaneity:

Opaque

Fracture:

Conchoidal - Irregular - Irregular fracture producing small, conchoidal fragments.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Metamict - Mineral originally crystalline, now amorphous due to radiation damage.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

6.5-7 - Pyrite-Quartz

Luster:

Vitreous - Metallic

Optical Properties of Romanite

Optical Data:

NCalc= 1.8 - from Gladstone-Dale relationship (KC = 0.1867) where Ncalc=Dmeas*KC+1

Calculated Properties of Romanite

Electron Density:

Bulk Density (Electron Density)=3.69 gm/cc
note: Specific Gravity of Romanite =4.27 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Romanite=1,237.46 barns/electron
U=PE_Romanite x r_electron=4,561.68 barns/cc.

Radioactivity:

GRapi = 2,881,545.60 (Gamma Ray American Petroleum Institute Units)
Concentration of Romanite per GRapi unit = 347.04 (PPB)

Romanite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 10.56 ± 2.64 grams of pure Romanite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1055.6 ±263.89 grams of pure Romanite .

**Estimated Radioactivity from Romanite** - very strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.65 cm	70,011,742	1.89E-03	2,881,545.60	947.36
100 gm / 3.55 cm	7,001,174	1.89E-04	288,154.56	94.74
10 gm / 1.65 cm	700,117	1.89E-05	28,815.46	9.47
1 gm / 7.65 mm	70,012	1.89E-06	2,881.55	0.95
0.1 gm / 3.55 mm	7,001	1.89E-07	288.15	0.09
0.01 gm / 1.65 mm	700	1.89E-08	28.82	0.01
0.001 gm / 0.77 mm	70	1.89E-09	2.88	0.00

Weight of pure Romanite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.27 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem

Romanite Classification

Dana Class:

04.00.00.00 (04)Oxide Minerals

(04.00)Without Dana Classification Numbers

(04.00.00)Oxide

04.00.00.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m

04.00.00.00 Chubutite* Pb7O6Cl2 Unk Ortho

04.00.00.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono

04.00.00.00 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m

04.00.00.00 IMA2008-022 UO2(OH)2 pseudo-orthorhombic Mono

04.00.00.00 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m

04.00.00.00 Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho

04.00.00.00 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig

04.00.00.00 Tantalowodginite* (Mn2,[])4Ta4Ta8O32 C 2/c 2/m

04.00.00.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 6₃/m,P 6₃ Hex

04.00.00.00 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc m

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 Romanite Information

References:

PHYS. PROP.(Am.Min.,Vol.77,p1117,1992)

See Also:

Links to other databases for Romanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info
12 - Uranium Minerals

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

Romanite

(Fe++,U,Pb)2(Ti,Fe+++)O4
Dana No: 04.00.00.00 Strunz No: 04.CB.05
Locality:

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