Lakebogaite Mineral Data

General Lakebogaite Information

Chemical Formula:

CaNaFe+++2H(UO2)2(PO4)4(OH)2(H2O)8

Composition:

Molecular Weight = 1,231.53 gm

Sodium 1.49 % Na 2.01 % Na₂O

Strontium 0.71 % Sr 0.84 % SrO

Calcium 3.25 % Ca 4.55 % CaO

Uranium 34.79 % U 39.47 % UO₂

Aluminum 0.66 % Al 1.24 % Al₂O₃

Iron 8.39 % Fe 11.99 % Fe₂O₃

Phosphorus 10.24 % P 23.46 % P₂O₅

Hydrogen 1.49 % H 13.34 % H₂O

Oxygen 38.97 % O

______ ______

100.00 % 96.91 % = TOTAL OXIDE

Empirical Formula:

CaNa_0.8Sr_0.1Fe³⁺_1.85Al_0.3(UO₂)_1.8(PO₄)_4.07(OH)₂(H₂O)_8.12

Environment:

Uranyl phosphate.

IMA Status:

Approved IMA 2007 (Dana # Added)

Locality:

A quarry, 10 km SSW of the township of Lake Boga, north-western Victoria, Australia Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA2007-001

Lakebogaite Image

Images:

Lakebogaite

Comments: Yellow, tabular, prismatic lakebogaite crystal with Na-analogue of meurigite (IMA 2007-024) globules on a quartz matrix.
Location: A quarry, 10 km SSW of the township of Lake Boga, north-western Victoria, Australia. Scale: Crystal size 0.4 mm across.
© American Mineralogist

Lakebogaite Crystallography

Axial Ratios:

a:b:c =2.7684:1:2.6357

Cell Dimensions:

a = 19.6441, b = 7.0958, c = 18.7029, Z = 4; beta = 115.692° V = 2,349.27 Den(Calc)= 3.48

Crystal System:

Monoclinic - Domatic H-M Symbol (m) Space Group: Cc

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

By Intensity(I/I_o): 6.6(1), 3.16(0.4), 2.002(0.2),2.797(0.2), 3.31(0.2), 3.56(0.2), 3.8(0.2), 4.07(0.2),

Physical Properties of Lakebogaite

Cleavage:

{h0l} Indistinct

Color:

Bright lemon yellow.

Density:

2.995 - 4.3, Average = 3.64

Diaphaneity:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Blocky - Crystal shape tends to be equant (e.g. feldspars).

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

pale yellow

Optical Properties of Lakebogaite

Gladstone-Dale:

CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1945,KPDmeas= 0.1856,KC= 0.1827
Ncalc = 1.55 - 1.79

Optical Data:

Biaxial (+), a=1.664, b=1.681, g=1.686, bire=0.0220, 2V(Calc)=56, 2V(Meas)=80-85. Dispersion r > v strong.

Calculated Properties of Lakebogaite

Electron Density:

Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Lakebogaite =3.65 gm/cc.

Fermion Index:

Fermion Index = 0.0050147312
Boson Index = 0.9949852688

Photoelectric:

PE_Lakebogaite= 857.94 barns/electron
U=PE_Lakebogaite x r_electron=2,894.17 barns/cc.

Radioactivity:

GRapi = 2,742,618.31 (Gamma Ray American Petroleum Institute Units)
Concentration of Lakebogaite per GRapi unit = 364.62 (PPB)

Lakebogaite 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) 11.09 ± 2.77 grams of pure Lakebogaite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1109.0 ±277.26 grams of pure Lakebogaite .

**Estimated Radioactivity from Lakebogaite** - 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 / 8.06 cm	62,274,736	1.68E-03	2,742,618.31	901.68
100 gm / 3.74 cm	6,227,474	1.68E-04	274,261.83	90.17
10 gm / 1.74 cm	622,747	1.68E-05	27,426.18	9.02
1 gm / 8.06 mm	62,275	1.68E-06	2,742.62	0.90
0.1 gm / 3.74 mm	6,227	1.68E-07	274.26	0.09
0.01 gm / 1.74 mm	623	1.68E-08	27.43	0.01
0.001 gm / 0.81 mm	62	1.68E-09	2.74	0.00

Weight of pure Lakebogaite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.65 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

Lakebogaite Classification

Dana Class:

42.04.06.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.04)where (AB)5 (XO4)2 Zq � x(H2O)

(42.04.06)Phuralumite Group

42.04.06.01 Phuralumite Al2(UO2)3(PO4)2(OH)6•10(H2O) P 2₁/a 2/m

42.04.06.02 Lakebogaite! CaNaFe2H(UO2)2(PO4)4(OH)2(H2O)8 Cc m

Strunz Class:

08.EA.20 08 - PHOSPHATES, ARSENATES, VANADATES

08.E - Uranyl Phosphates and Arsenates

08.EA -UO2:RO4 = 1:2

08.EA.20 Lakebogaite! CaNaFe2H(UO2)2(PO4)4(OH)2(H2O)8 Cc m

Other Lakebogaite Information

References:

NAME( AmMin. V93:691) PHYS. PROP.(AmMin. V93:691) OPTIC PROP.(AmMin. V93:691)

See Also:

Links to other databases for Lakebogaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Lakebogaite

CaNaFe+++2H(UO2)2(PO4)4(OH)2(H2O)8
Dana No: 42.04.06.02 Strunz No: 08.EA.20
Locality:

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