Romanite Mineral Data

Advertisment

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.

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:

TrigonalSpace 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 Becquerels (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

Search for Romanite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Romanite :

A Bijoux Google Search for Romanite
Adam's Minerals Google Search for Romanite
Cape Minerals Google Search for Romanite
Dakota Matrix Minerals Google Search for Romanite
Excalibur Mineral Corp. Google Search for Romanite
Exceptional Minerals Google Search for Romanite
John Betts Fine Minerals Search for Romanite
McDougall Minerals Google Search for Romanite
Mineral News Website Link
Rock and Mineral Shows Google Search for Romanite
Weinrich Minerals, Inc. Google Search 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 Español

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: