Romanite Mineral Data (original) (raw)

General Romanite Information

Help on Chemical Formula: Chemical Formula:

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

Help on Composition: 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

Help on Empirical Formula: Empirical Formula:

Fe2+1.2U0.6Pb0.2Ti0.75Fe3+0.25O4

Help on IMA Status: IMA Status:

Not Submitted IMA

Help on Locality: Locality:

Romania. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after the locality.

Romanite Image

Click Here for Larger Romanite Image in a New Browser Window Images:

Click Here for Larger Romanite Image 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

Help on Crystal System: Crystal System:

TrigonalSpace Group: Trig ?

Help on X Ray Diffraction: X Ray Diffraction:

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

Physical Properties of Romanite

Help on Color: Color:

Gray, Black.

Help on Density: Density:

4.07 - 4.46, Average = 4.26

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Fracture: Fracture:

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

Help on Habit: Habit:

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

Help on Habit: Habit:

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

Help on Habit: Habit:

Tabular - Form dimensions are thin in one direction.

Help on Hardness: Hardness:

6.5-7 - Pyrite-Quartz

Help on Luster: Luster:

Vitreous - Metallic

Optical Properties of Romanite

Help on Optical Data: Optical Data:

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

Calculated Properties of Romanite

Help on Electron Density: Electron Density:

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

Help on Fermion Index: Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Help on Photoelectric: Photoelectric:

PERomanite =1,237.46 barns/electron
U=PERomanite x relectron=4,561.68 barns/cc.

Help on Radioactivity: 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

SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor 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

Help on Dana Class: 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

Help on Strunz Class: 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

Help on References: References:

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

Help on See Also: 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:

Notes: