Mineralogy Database

Romanite Mineral Data

Search Webmineral :
  
Advertisment

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

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

Search for Romanite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Romanite :

Ask about Romanite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

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:

 

 
   
 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.