Mineralogy Database

Haiweeite Mineral Data

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General Haiweeite Information

Help on Chemical  Formula: Chemical Formula: Ca[(UO2)2Si5O12(OH)2]•3(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ca(UO2)2Si5O12(OH)2•3(H2O)
Help on Environment: Environment: Secondary, oxidation product.
Help on IMA Status: IMA Status: Approved IMA 1959
Help on Locality: Locality: Haiwee Reservoir, Inyo County, California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after it's locality.
Help on Name Pronunciation: Name Pronunciation: Haiweeite + Pronunciation Say HAIWEEITE
Help on Synonym: Synonym: ICSD 85085
  PDF 22-160
  Ranquilite
 

Haiweeite Image

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  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

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  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

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  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

Help on Axial Ratios: Axial Ratios: a:b:c =0.3972:1:1.0225
Help on Cell Dimensions: Cell Dimensions: a = 7.125, b = 17.937, c = 18.342, Z = 4; V = 2,344.13 Den(Calc)= 2.84
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mcm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.14(1), 4.42(0.6), 4.556(0.6),
 

Physical Properties of Haiweeite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Greenish yellow, Light yellow.
Help on Density: Density: 2.86 - 3.35, Average = 3.1
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luminescence: Luminescence: Fluorescent, Short UV=weak dull green, Long UV=weak dull green.
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Haiweeite

Help on Gladstone-Dale: 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
Ncalc = 1.43 - 1.51
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Haiweeite =3.11 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHaiweeite =1,201.22 barns/electron
U=PEHaiweeite x relectron=3,354.76 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,647,561.22 (Gamma Ray American Petroleum Institute Units)
Concentration of Haiweeite per GRapi unit = 274.16 (PPB)

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 85,162,038 2.30E-03 3,647,561.22 1,199.20
100 gm / 3.95 cm 8,516,204 2.30E-04 364,756.12 119.92
10 gm / 1.83 cm 851,620 2.30E-05 36,475.61 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

Help on  Dana Class: Dana Class: 53.03.02.02 (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
Help on  Strunz Class: 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 Haiweeite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Haiweeite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

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Print or Cut-and-Paste your Haiweeite Specimen Label here :

Haiweeite

Ca[(UO2)2Si5O12(OH)2]•3(H2O)
Dana No: 53.03.02.02 Strunz No: 09.AK.25
Locality:

 

Notes:

 

 
   
 


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