Metahaiweeite Mineral Data

[Minerals] [Gems] [Sale Items] [Gold Rings] [Big Stuff] [Main Page]
Shop early for Holiday Season and get the best stuff.
You can put it on layaway for up to six weeks!

General Metahaiweeite Information

Chemical Formula:

Ca(UO2)2Si6O15•n(H2O), n<5

Composition:

Molecular Weight = 1,033.68 gm

Calcium 3.88 % Ca 5.43 % CaO

Uranium 46.05 % U 52.25 % UO₂

Silicon 16.30 % Si 34.88 % SiO₂

Hydrogen 0.49 % H 4.36 % H₂O

Oxygen 33.28 % O

______ ______

100.00 % 96.90 % = TOTAL OXIDE

Empirical Formula:

Ca(UO₂)₂Si₆O₁₅•2.5(H₂O)

IMA Status:

Approved IMA 1959

Locality:

Haiwee Reservoir, Inyo County, California, USA. Link to MinDat.org Location Data.

Name Origin:

Dehydration product of haiweeite.

Name Pronunciation:

Metahaiweeite + Pronunciation

Metahaiweeite Image

Images:

Click Here for Larger Metahaiweeite Image

Metahaiweeite Haiweeite

Comments: Pale yellow scaly metahaiweeite coating on quartz with minute haiweeite acicular crystals.
Location: Coso Uranium Mine, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Metahaiweeite Crystallography

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/c ?

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

By Intensity(I/I_o): 6.98(1), 5.85(0.5), 8.81(0.5),

Physical Properties of Metahaiweeite

Cleavage:

{100} Distinct

Color:

Greenish yellow, Light yellow.

Density:

3.35

Diaphaneity:

Translucent

Hardness:

3.5 - Copper Penny

Luminescence:

Fluorescent, Short UV=dull green, Long UV=dull green.

Luster:

Pearly

Streak:

white

Optical Properties of Metahaiweeite

Gladstone-Dale:

CI meas= -0.236 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1867,KC= 0.151
Ncalc = 1.51

Optical Data:

Biaxial (+), a=1.611, b=1.62, g=1.645, bire=0.0340

Calculated Properties of Metahaiweeite

Electron Density:

Bulk Density (Electron Density)=3.01 gm/cc
note: Specific Gravity of Metahaiweeite =3.35 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Metahaiweeite}=1,162.58 barns/electron
U=PE_{Metahaiweeite} x r_electron=3,504.01 barns/cc.

Radioactivity:

GRapi = 3,531,895.47 (Gamma Ray American Petroleum Institute Units)
Concentration of Metahaiweeite per GRapi unit = 283.13 (PPB)

Metahaiweeite 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) 8.61 ± 2.15 grams of pure Metahaiweeite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 861.20 ±215.30 grams of pure Metahaiweeite .

**Estimated Radioactivity from Metahaiweeite** - 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 / 8.29 cm	82,438,191	2.23E-03	3,531,895.47	1,161.17
100 gm / 3.85 cm	8,243,819	2.23E-04	353,189.55	116.12
10 gm / 1.79 cm	824,382	2.23E-05	35,318.95	11.61
1 gm / 8.29 mm	82,438	2.23E-06	3,531.90	1.16
0.1 gm / 3.85 mm	8,244	2.23E-07	353.19	0.12
0.01 gm / 1.79 mm	824	2.23E-08	35.32	0.01
0.001 gm / 0.83 mm	82	2.23E-09	3.53	0.00

Weight of pure Metahaiweeite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.35 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

Metahaiweeite Classification

Dana Class:

53.03.02.03 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations

(53.03)with (UO2)

(53.03.02)Weeksite group

53.03.02.01 Weeksite K2(UO2)2Si6O15•4(H2O) C mmb 2/m 2/m 2/m

53.03.02.02 Haiweeite Ca[(UO2)2Si5O12(OH)2]•3(H2O) C mcm 2/m 2/m 2/m

53.03.02.03 Metahaiweeite Ca(UO2)2Si6O15•n(H2O),n<5 P 2/c ? 2/m

53.03.02.04 Coutinhoite! ThxBa1-2x(H2O)y(UO2)2Si5O13•H2O C mmb 2/m 2/m 2/m

Strunz Class:

09.AK.25 09 - SILICATES (Germanates)

09.A - Nesosilicates

09.AK -Uranyl neso- and polysilicates

09.AK.25 Haiweeite Ca[(UO2)2Si5O12(OH)2]•3(H2O) C mcm 2/m 2/m 2/m

09.AK.25 Metahaiweeite Ca(UO2)2Si6O15•n(H2O),n<5 P 2/c ? 2/m

Other Metahaiweeite Information

References:

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

See Also:

Links to other databases for Metahaiweeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Metahaiweeite using:

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

Visit our Advertisers for Metahaiweeite :

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 Metahaiweeite Mineral Data :

Ask about Metahaiweeite 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 Metahaiweeite Specimen Label here :

Metahaiweeite

Ca(UO2)2Si6O15•n(H2O), n<5
Dana No: 53.03.02.03 Strunz No: 09.AK.25
Locality:

Notes: