Haiweeite Mineral Data

Haiweeite Mineral Data +

General Haiweeite Information

Chemical Formula:

Ca[(UO2)2Si5O12(OH)2]·3(H2O)

Composition:

Molecular Weight = 1,000.61 gm

Calcium 4.01 % Ca 5.60 % CaO

Uranium 47.58 % U 53.97 % UO₂

Silicon 14.03 % Si 30.02 % SiO₂

Hydrogen 0.81 % H 7.20 % H₂O

Oxygen 33.58 % O

______ ______

100.00 % 96.80 % = TOTAL OXIDE

Empirical Formula:

Ca(UO₂)₂Si₅O₁₂(OH)₂·3(H₂O)

Environment:

Secondary, oxidation product.

IMA Status:

Approved IMA 1959

Locality:

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

Name Origin:

Named after it's locality.

Synonym:

ICSD 85085

PDF 22-160

Ranquilite

Haiweeite Image

Images:

Haiweeite

Comments: Minute divergent acicular crystals of white haiweeite on matrix.
Location: Coso Uranium Mine, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Haiweeite Metahaiweeite

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

Images:

Haiweeite

Comments: Yellow, spherical, aggregates of acicular haiweeite with clear calcite scalenohedrons.
Location: Teofilo Otoni, Minas Gerais, Brazil.. Scale: Picture size 1 cm.
© Paul M. Schumacher

Haiweeite Crystallography

Axial Ratios:

a:b:c =0.3972:1:1.0225

Cell Dimensions:

a = 7.125, b = 17.937, c = 18.342, Z = 4; V = 2,344.13 Den(Calc)= 2.84

Crystal System:

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

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

By Intensity(I/I_o): 9.14(1), 4.42(0.6), 4.556(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Burns P C , The Canadian Mineralogist , 39 (2001) p.1153-1160, A new uranyl silicate sheet in the structure of haiweeite and comparison to, other uranyl silicates

Physical Properties of Haiweeite

Cleavage:

[001] Good

Color:

Greenish yellow, Light yellow.

Density:

2.86 - 3.35, Average = 3.1

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

3.5 - Copper Penny

Luster:

Pearly

Streak:

white

Optical Properties of Haiweeite

Gladstone-Dale:

CI meas= -0.212 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.325 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2022,KPDmeas= 0.185,KC= 0.1527

Optical Data:

Biaxial (-), a=1.56-1.571, b=1.575-1.58, g=1.578-1.582, bire=0.0110-0.0180, 2V(Calc)=46-50, 2V(Meas)=15. Dispersion r > v strong.

Calculated Properties of Haiweeite

Electron Density:

r_electron=2.79 gm/cc
note: r_Haiweeite=3.11 gm/cc.

Fermion Index

Fermion Index = 0.01019
Boson Index = 0.98981

Photoelectric:

PE_Haiweeite=1,201.22 barns/electron
U=PE_Haiweeite x r_electron=3,354.76 barns/cc.

Radioactivity:

GRapi = 3,647,558.84 (Gamma Ray American Petroleum Institute Units)

Haiweeite 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) 8.34 ± 2.08 grams of pure Haiweeite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 833.89 ±208.47 grams of pure Haiweeite .

**Estimated Radioactivity from Haiweeite** - 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 / 8.50 cm	85,162,025	2.30E-03	3,647,558.84	1,199.20
100 gm / 3.95 cm	8,516,203	2.30E-04	364,755.88	119.92
10 gm / 1.83 cm	851,620	2.30E-05	36,475.59	11.99
1 gm / 8.50 mm	85,162	2.30E-06	3,647.56	1.20
0.1 gm / 3.95 mm	8,516	2.30E-07	364.76	0.12
0.01 gm / 1.83 mm	852	2.30E-08	36.48	0.01
0.001 gm / 0.85 mm	85	2.30E-09	3.65	0.00

Weight of pure Haiweeite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.11 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

Haiweeite Classification

Dana Class:

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

(53.3)with (UO2)

(53.3.2)Weeksite group

53.3.2.1 Weeksite K2(UO2)2Si6O15·4(H2O) C mmb 2/m 2/m 2/m

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

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

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

Strunz Class:

VIII/B.37-20 VIII - Silicates

VIII/B - Nesosub-silicates. "Insel" silicates with anions unfamiliar to tetraheders. Uranyl-"Insel" silicates with [UO2]2+ - [SiO4]4-

VIII/B.37 - Ursilite - Metahaiweeite series

VIII/B.37-10 Ursilite* (Mg,Ca)4[(UO2)4(OH)5/(Si2O5)5.5]·13(H2O) Unk Ortho

VIII/B.37-20 Haiweeite Ca[(UO2)2Si5O12(OH)2]·3(H2O) C mcm 2/m 2/m 2/m

VIII/B.37-30 Metahaiweeite Ca(UO2)2Si6O15·n(H2O),n<5 P 2/c ? 2/m

Other Haiweeite Information

References:

NAME( MinRec) PHYS. PROP.(AmMin, Vol 84, p 197, Vol 87, p768) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Haiweeite using:

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

Visit our Advertisers for Haiweeite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Haiweeite Mineral Data :

Ask about Haiweeite 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 Haiweeite Specimen Label here :

Haiweeite

Ca[(UO2)2Si5O12(OH)2]·3(H2O)
Dana No: 53.3.2.2 Strunz No: VIII/B.37-20
Locality:

Notes: