Lermontovite Mineral Data

Lermontovite Mineral Data +

[Mineral Specimens] [Mineral Locations] [About Us] [Search] [Register]
Greenside Minerals
Newest website on the Internet for top quality, affordable minerals from around the World
We specialize in minerals from the UK and Ireland

General Lermontovite Information

Chemical Formula:

U++++(PO4)(OH)·(H2O) (?)

Composition:

Molecular Weight = 368.02 gm

Uranium 64.68 % U 73.37 % UO₂

Phosphorus 8.42 % P 19.28 % P₂O₅

Hydrogen 0.82 % H 7.34 % H₂O

Oxygen 26.08 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

U(PO₄)(OH)·(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Link to MinDat.org Location Data.

Search for Lermontovite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Lermontovite Crystallography

Axial Ratios:

a:b:c =0.5126:1:0.5315

Cell Dimensions:

a = 9.74, b = 19, c = 10.1, Z = 12; V = 1,869.11 Den(Calc)= 3.92

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C cca

Physical Properties of Lermontovite

Color:

Gray green.

Density:

4.5

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Luster:

Silky

Streak:

light green

Optical Properties of Lermontovite

Gladstone-Dale:

CI meas= -0.175 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.349 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1803,KPDmeas= 0.157,KC= 0.1336

Optical Data:

Biaxial (?), a=1.686-1.69, b=1.707, g=1.724-1.726, bire=0.0360-0.0380

Calculated Properties of Lermontovite

Electron Density:

r_electron=3.86 gm/cc
note: r_Lermontovite=4.50 gm/cc.

Fermion Index

Fermion Index = 0.00478
Boson Index = 0.99522

Photoelectric:

PE_Lermontovite=1,709.40 barns/electron
U=PE_Lermontovite x r_electron=6,604.95 barns/cc.

Radioactivity:

GRapi = 4,733,699.09 (Gamma Ray American Petroleum Institute Units)

Lermontovite 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) 6.43 ± 1.61 grams of pure Lermontovite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 642.56 ±160.64 grams of pure Lermontovite .

**Estimated Radioactivity from Lermontovite** - 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 / 7.52 cm	115,773,155	3.13E-03	4,733,699.09	1,556.28
100 gm / 3.49 cm	11,577,316	3.13E-04	473,369.91	155.63
10 gm / 1.62 cm	1,157,732	3.13E-05	47,336.99	15.56
1 gm / 7.52 mm	115,773	3.13E-06	4,733.70	1.56
0.1 gm / 3.49 mm	11,577	3.13E-07	473.37	0.16
0.01 gm / 1.62 mm	1,158	3.13E-08	47.34	0.02
0.001 gm / 0.75 mm	116	3.13E-09	4.73	0.00

Weight of pure Lermontovite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.50 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

Lermontovite Classification

Dana Class:

40.4.8.2 (40)Hydrated Phosphates, etc

(40.4)where A+++ XO4 · x(H2O)

(40.4.8)Dana Group

40.4.8.1 Ningyoite (U,Ca,Ce)2(PO4)2·1-2(H2O) P 222 2 2 2

40.4.8.2 Lermontovite U(PO4)(OH)·(H2O)(?) C cca 2/m 2/m 2/m

40.4.8.3 Vyacheslavite U(PO4)(OH)·2.5(H2O) C mcm, C mc2₁, C 2cm Ortho

Strunz Class:

VII/D.43-20 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K

VII/D.43 - Vyacheslavite - Lermontovite series

VII/D.43-10 Vyacheslavite U(PO4)(OH)·2.5(H2O) C mcm, C mc2₁, C 2cm Ortho

VII/D.43-20 Lermontovite U(PO4)(OH)·(H2O)(?) C cca 2/m 2/m 2/m

Other Lermontovite Information

References:

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

See Also:

Links to other databases for Lermontovite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 -École des Mines de Paris

Search for Lermontovite using:

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

Visit our Advertisers for Lermontovite :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

T G Fine Minerals

Wrights Rock Shop

Translate Lermontovite Mineral Data :

Ask about Lermontovite 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 Lermontovite Specimen Label here :

Lermontovite

U++++(PO4)(OH)·(H2O) (?)
Dana No: 40.4.8.2 Strunz No: VII/D.43-20
Locality:

Notes: