Autunite Mineral Data (original) (raw)
General Autunite Information
Chemical Formula:
Ca(UO2)2(PO4)2•10-12(H2O)
Composition:
Molecular Weight = 986.26 gm
Calcium 4.06 % Ca 5.69 % CaO
Uranium 48.27 % U 54.76 % UO2
Phosphorus 6.28 % P 14.39 % P2O5
Hydrogen 2.45 % H 21.92 % H2O
Oxygen 38.93 % O
______ ______
100.00 % 96.76 % = TOTAL OXIDE
Empirical Formula:
Ca(UO2)2(PO4)2•12(H2O)
Environment:
Secondary mineral associated with uraninite.
IMA Status:
Valid Species (Pre-IMA) 1852
Locality:
L'Ouche de Jau, St. Symphorien, and other places near Autun, Saone-et-Loire, France. Link to MinDat.org Location Data.
Name Origin:
Named for the locality.
Name Pronunciation:
Autunite 
Synonym:
Lime Uranite
Autunite Image
Images:
 |
Autunite Comments: Fluorescent, tabular to platy, yellow green autunite crystals on matrix. Location: Margnac, Haute Vienne, France.Scale: 1 cm. © John Veevaert |
|---|
Images:
 |
Autunite Meta-autunite Comments: Corner of a meta-autunite crystal showing the dehydration of autunite (dark green) to meta-autunite (lighter yellowish green).. Location: Daybreak Mine, Spokane County, Washington, U.S.A..Scale: See Image. © Paul M. Schumacher |
|---|
Autunite Crystallography
Axial Ratios:
a:c = 1:2.95848
Cell Dimensions:
a = 7.009, c = 20.736, Z = 2; V = 1,018.68 Den(Calc)= 3.22
Crystal System:
Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm
X Ray Diffraction:
By Intensity(I/Io): 10.3(1), 4.96(0.8), 3.59(0.7),
Forms:
Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
- Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above
| | Forms:( 1 1 2) ( 1 1 0) ( 0 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | --------------------------------------------------------------------------------------------------------------------------------------------------- |
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
| | Locock A J , Burns P C , American Mineralogist , 88 (2003) p.240-244, The crystal structure of synthetic autunite, Ca[(UO2)(PO4)]2(H2O)11 | | ---------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Autunite
Cleavage:
{001} Perfect, {100} Poor, {010} Poor
Color:
Yellow, Pale yellow, Lemon yellow, Greenish yellow, Pale green.
Density:
3.1 - 3.2, Average = 3.15
Diaphaneity:
Transparent to translucent
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Foliated - Two dimensional platy forms.
Habit:
Micaceous - Platy texture with "flexible" plates.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
Fluorescent, Short UV=green yellow, Long UV=green yellow.
Luster:
Vitreous - Pearly
Streak:
pale yellow
Optical Properties of Autunite
Gladstone-Dale:
CI meas= -0.077 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.053 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1765,KPDmeas= 0.1804,KC= 0.1676
Ncalc = 1.52 - 1.54
Optical Data:
Biaxial (-), a=1.553, b=1.575, g=1.577, bire=0.0240
Calculated Properties of Autunite
Electron Density:
Bulk Density (Electron Density)=2.94 gm/cc
note: Specific Gravity of Autunite =3.22 gm/cc.
Fermion Index:
Fermion Index = 0.0037207887
Boson Index = 0.9962792113
Photoelectric:
PEAutunite =1,201.01 barns/electron
U=PEAutunite x relectron=3,529.03 barns/cc.
Radioactivity:
GRapi = 3,754,512.44 (Gamma Ray American Petroleum Institute Units)
Concentration of Autunite per GRapi unit = 266.35 (PPB)
Autunite 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) 8.10 ± 2.03 grams of pure Autunite .
Estimated Maximum U.S. Postal Shipping Size(10 mRem/hr limit, Unshielded 100 cm box) 810.14 ±202.53 grams of pure Autunite .
Estimated Radioactivity from Autunite 
- very strong
| SpecimenSizeWeight/Volume(Sphere) * | CalculatedActivityBecquerels(Bq) | CalculatedActivityCuries (Ci) | EstimatedActivityGR(api) | EstimatedExposure(mRem**)/hrIf Held in HandFor One Hour |
|---|---|---|---|---|
| 1000 gm / 8.40 cm | 86,401,548 | 2.34E-03 | 3,754,512.44 | 1,234.36 |
| 100 gm / 3.90 cm | 8,640,155 | 2.34E-04 | 375,451.24 | 123.44 |
| 10 gm / 1.81 cm | 864,015 | 2.34E-05 | 37,545.12 | 12.34 |
| 1 gm / 8.40 mm | 86,402 | 2.34E-06 | 3,754.51 | 1.23 |
| 0.1 gm / 3.90 mm | 8,640 | 2.34E-07 | 375.45 | 0.12 |
| 0.01 gm / 1.81 mm | 864 | 2.34E-08 | 37.55 | 0.01 |
| 0.001 gm / 0.84 mm | 86 | 2.34E-09 | 3.75 | 0.00 |
Weight of pure Autunite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.22 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
Autunite Classification
Dana Class:
40.02a.01.01 (40)Hydrated Phosphates, etc
(40.02a)where A++ (B++)2 (XO4) � x(H2O), containing (UO2)++
(40.02a.01)Autunite Group
40.02a.01.01 Autunite Ca(UO2)2(PO4)2•10-12(H2O) I 4/mmm 4/m 2/m 2/m
40.02a.01.02 Meta-autunite Ca(UO2)2(PO4)2•2-6(H2O) P 4/nmm 4/m 2/m 2/m
40.02a.01.03 Pseudo-autunite* (H3O)4Ca2(UO2)2(PO4)4•5(H2O)(?) Unk Ortho
40.02a.01.04 Sodium meta-autunite! Na2(UO2)2(PO4)2•6-8(H2O) P 4/nmm 4/m 2/m 2/m
Strunz Class:
08.EB.05 08 - PHOSPHATES, ARSENATES, VANADATES
08.E - Uranyl Phosphates and Arsenates
08.EB -UO2:RO4 = 1:1
08.EB.05 Autunite Ca(UO2)2(PO4)2•10-12(H2O) I 4/mmm 4/m 2/m 2/m
08.EB.05 Heinrichite Ba(UO2)2(AsO4)2•10-12(H2O) P 2/c 2/m
08.EB.05 Kahlerite Fe(UO2)2(AsO4)2•10-12(H2O) P 41/n 4/m
08.EB.05 Uranocircite Ba(UO2)2(PO4)2•12(H2O) P 4/nnc 4/m 2/m 2/m
08.EB.05 Novacekite Mg(UO2)2(AsO4)2•12(H2O) P 41/n 4/m
08.EB.05 Saleeite Mg(UO2)2(PO4)2•10(H2O) I 4/mmm 4/m 2/m 2/m
08.EB.05 Xiangjiangite (Fe,Al)(UO2)4(PO4)2(SO4)2(OH)•22(H2O) C 2/c or Cc Mono
08.EB.05 Torbernite Cu(UO2)2(PO4)2•8-12(H2O) I 4/mmm 4/m 2/m 2/m
08.EB.05 Uranospinite Ca(UO2)2(AsO4)2•10(H2O) P nma 2/m 2/m 2/m
08.EB.05 Zeunerite Cu(UO2)2(AsO4)2•10-16(H2O) P 4/nnc 4/m 2/m 2/m
08.EB.05 Metarauchite! Ni(UO2)2(AsO4)2•8H2O P1 1
Other Autunite Information
References:
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)
See Also:
Links to other databases for Autunite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - Philatelic Mineralogy
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - Uranium Minerals
Search for Autunite using:
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]
Visit our Advertisers for Autunite :
A Bijoux Google Search for Autunite
Adam's Minerals Google Search for Autunite
Cape Minerals Google Search for Autunite
Dakota Matrix Minerals Google Search for Autunite
Excalibur Mineral Corp. Google Search for Autunite
Exceptional Minerals Google Search for Autunite
John Betts Fine Minerals Search for Autunite
McDougall Minerals Google Search for Autunite
Mineral News Website Link
Rock and Mineral Shows Google Search for Autunite
Weinrich Minerals, Inc. Google Search for Autunite
Ask about Autunite 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 Espa�ol
Print or Cut-and-Paste your Autunite Specimen Label here :
Autunite
Ca(UO2)2(PO4)2•10-12(H2O)
Dana No: 40.02a.01.01 Strunz No: 08.EB.05
Locality:
Notes: