Metacalciouranoite Mineral Data

General Metacalciouranoite Information

Chemical Formula:

(Ca,Na,Ba)U2O7•2(H2O)

Composition:

Molecular Weight = 718.40 gm

Barium 3.82 % Ba 4.27 % BaO

Sodium 0.96 % Na 1.29 % Na₂O

Calcium 2.23 % Ca 3.12 % CaO

Uranium 69.58 % U 83.61 % UO₃

Hydrogen 0.48 % H 4.26 % H₂O

Lead 2.88 % Pb 3.11 % PbO

Oxygen 20.04 % O

______ ______

100.00 % 99.67 % = TOTAL OXIDE

Empirical Formula:

Ca_0.4Na_0.3Ba_0.2Pb_0.1O2.1(UO₃)•1.7(H₂O)

Environment:

Oxidation zone of U-Mo deposit. An inadequately described species.

IMA Status:

Approved IMA 1973

Locality:

U-Mo deposit in Russia. Link to MinDat.org Location Data.

Name Origin:

Named from meta 'change' and calciouranoite indicating it's lower hydrate content.

Name Pronunciation:

Metacalciouranoite + Pronunciation

Metacalciouranoite Image

Images:

Click Here for Larger Metacalciouranoite Image

Metacalciouranoite Calciouranoite

Comments: Cryptocrystalline looking, greasy yellow blotches, of amorphous calciouranoite (probably, in part, dehydrated to matacalciouranoite).
Location: Oktyabr'skoye Mo-U deposit, east Transbaikal region, Russia. Scale: See Image.
© Rruff Database

Metacalciouranoite Crystallography

Crystal System:

OrthorhombicSpace Group: Ortho ?

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

By Intensity(I/I_o): 3.09(1), 1.676(0.67), 1.283(0.67),3.43(0.6), 1.94(0.4), 1.99(0.4), 1.73(0.3), 1.92(0.3),

Physical Properties of Metacalciouranoite

Color:

Orange.

Density:

4.9

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Optical Properties of Metacalciouranoite

Gladstone-Dale:

CI meas= -0.415 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1864,KC= 0.1318
Ncalc = 1.65

Optical Data:

Biaxial (-), a=1.897, b=1.911, g=1.932, bire=0.0350, 2V(Calc)=80, 2V(Meas)=81.

Calculated Properties of Metacalciouranoite

Electron Density:

Bulk Density (Electron Density)=4.08 gm/cc
note: Specific Gravity of Metacalciouranoite =4.90 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Metacalciouranoite}=1,966.39 barns/electron
U=PE_{Metacalciouranoite} x r_electron=8,028.57 barns/cc.

Radioactivity:

GRapi = 4,941,876.04 (Gamma Ray American Petroleum Institute Units)
Concentration of Metacalciouranoite per GRapi unit = 202.35 (PPB)

Metacalciouranoite 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) 6.15 ± 1.54 grams of pure Metacalciouranoite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 615.49 ±153.87 grams of pure Metacalciouranoite .

**Estimated Radioactivity from Metacalciouranoite** - 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 / 7.30 cm	124,548,420	3.37E-03	4,941,876.04	1,624.73
100 gm / 3.39 cm	12,454,842	3.37E-04	494,187.60	162.47
10 gm / 1.57 cm	1,245,484	3.37E-05	49,418.76	16.25
1 gm / 7.30 mm	124,548	3.37E-06	4,941.88	1.62
0.1 gm / 3.39 mm	12,455	3.37E-07	494.19	0.16
0.01 gm / 1.57 mm	1,245	3.37E-08	49.42	0.02
0.001 gm / 0.73 mm	125	3.37E-09	4.94	0.00

Weight of pure Metacalciouranoite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.90 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

Metacalciouranoite Classification

Dana Class:

05.04.03.01 (05)Oxides Containing Uranium and Thorium

(05.04)with alkaline-earth elements (hydrated)

(05.04.03)Dana Group

05.04.03.01 Metacalciouranoite (Ca,Na,Ba)U2O7•2(H2O) Ortho ? Ortho

05.04.03.02 Wolsendorfite (Pb,Ba,Ca)U2O7•2(H2O) Unk Ortho

Strunz Class:

04.GB.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.G - Uranyl Hydroxides

04.GB -With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra

04.GB.20 Calciouranoite (Ca,Ba,Pb)U2O7•5(H2O) Unk Tri

04.GB.20 Bauranoite BaU2O7•4-5(H2O) Triclinic ? Tri

04.GB.20 Metacalciouranoite (Ca,Na,Ba)U2O7•2(H2O) Ortho ? Ortho

Other Metacalciouranoite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Metacalciouranoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

Search for Metacalciouranoite using:

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

Visit our Advertisers for Metacalciouranoite :

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

Ask about Metacalciouranoite 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 Metacalciouranoite Specimen Label here :

Metacalciouranoite

(Ca,Na,Ba)U2O7•2(H2O)
Dana No: 05.04.03.01 Strunz No: 04.GB.20
Locality:

Notes: