Umbozerite Mineral Data

[Mineral Forums] [Minerals for Sale] [About Us] [En Espanol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

General Umbozerite Information

Chemical Formula:

Na3Sr4ThSi8(O,OH)24

Composition:

Molecular Weight = 1,262.17 gm

Sodium 5.46 % Na 7.37 % Na₂O

Strontium 27.77 % Sr 32.84 % SrO

Thorium 18.38 % Th 20.92 % ThO₂

Silicon 17.80 % Si 38.08 % SiO₂

Hydrogen 0.16 % H 1.43 % H₂O

Oxygen 30.42 % O

______ ______

100.00 % 100.63 % = TOTAL OXIDE

Empirical Formula:

Na₃Sr₄ThSi₈O₂₂(OH)₂

Environment:

In ussingite veinlets cutting alkalic rocks.

IMA Status:

Approved IMA 1974

Locality:

Umbozero (Lake Umba), Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Umbozerite + Pronunciation

Umbozerite Image

Images:

Umbozerite

Comments: Dark brown prismatic umbozerite masses in pegmatite rock.
Location: Pegmatite #100, Mount Karnasurt, Lovozero Massif, Kola Peninsula, Murmansk District,. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Umbozerite Crystallography

Crystal System:

Amorphous- No Crystals

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

By Intensity(I/I_o): 3.29(1), 1.701(0.8), 3.38(0.6),

Physical Properties of Umbozerite

Cleavage:

None

Color:

Bottle green, Greenish brown.

Density:

3.6

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

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

Habit:

Pseudo Tetragonal - Crystals show a tetragonal shape.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Optical Properties of Umbozerite

Gladstone-Dale:

CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1778,KC= 0.1806
Ncalc = 1.65

Optical Data:

Isotropic, n=1.64.

Calculated Properties of Umbozerite

Electron Density:

Bulk Density (Electron Density)=3.31 gm/cc
note: Specific Gravity of Umbozerite =3.60 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Umbozerite= 452.73 barns/electron
U=PE_Umbozerite x r_electron=1,500.48 barns/cc.

Radioactivity:

GRapi = 361,065.87 (Gamma Ray American Petroleum Institute Units)
Concentration of Umbozerite per GRapi unit = 2.77 (PPM)

Umbozerite 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) 84.24 ± 21.06 grams of pure Umbozerite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 8424.1 ±2106.0 grams of pure Umbozerite .

**Estimated Radioactivity from Umbozerite** - 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 / 8.10 cm	8,236,040	2.23E-04	361,065.87	118.71
100 gm / 3.76 cm	823,604	2.23E-05	36,106.59	11.87
10 gm / 1.74 cm	82,360	2.23E-06	3,610.66	1.19
1 gm / 8.10 mm	8,236	2.23E-07	361.07	0.12
0.1 gm / 3.76 mm	824	2.23E-08	36.11	0.01
0.01 gm / 1.74 mm	82	2.23E-09	3.61	0.00
0.001 gm / 0.81 mm	8	2.23E-10	0.36	0.00

Weight of pure Umbozerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.60 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

Umbozerite Classification

Dana Class:

78.07.17.01 (78)Unclassified silicates

(78.07)wholly unclassified silicates

(78.07.17)Dana Group

78.07.17.01 Umbozerite Na3Sr4ThSi8(O,OH)24 None

Strunz Class:

09.HG.15 09 - SILICATES (Germanates)

09.H - Unclassified Silicates

09.HG -With REE, Th

09.HG.15 Umbozerite Na3Sr4ThSi8(O,OH)24 None

Other Umbozerite 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 Umbozerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

Search for Umbozerite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Umbozerite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Umbozerite Mineral Data :

Ask about Umbozerite 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 Umbozerite Specimen Label here :

Umbozerite

Na3Sr4ThSi8(O,OH)24
Dana No: 78.07.17.01 Strunz No: 09.HG.15
Locality:

Notes: