Albrechtschraufite Mineral Data

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General Albrechtschraufite Information

Chemical Formula:

Ca4Mg(UO2)2(CO3)6F2•17(H2O)

Composition:

Molecular Weight = 1,428.98 gm

Calcium 11.22 % Ca 15.70 % CaO

Magnesium 1.70 % Mg 2.82 % MgO

Uranium 33.31 % U 37.79 % UO₂

Hydrogen 2.40 % H 21.43 % H₂O

Carbon 5.04 % C 18.48 % CO₂

Oxygen 43.67 % O

Fluorine 2.66 % F 2.66 % F

- % F -1.12 % -O=F₂

______ ______

100.00 % 97.76 % = TOTAL OXIDE

Empirical Formula:

Ca₄Mg(UO₂)₂(CO₃)₆F₂•17(H₂O)

Environment:

Museum specimen of schrockingerite.

IMA Status:

Approved IMA 1984

Locality:

Jachymov, Zapadocesky, Czech Rep, Link to MinDat.org Location Data.

Name Origin:

Named for Albrecht Schrauf (1837-1897), Austrian crystallographer, University of Vienna, Vienna, Austria.

Name Pronunciation:

Albrechtschraufite + Pronunciation

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Albrechtschraufite Crystallography

Axial Ratios:

a:b:c =1.0116:1:0.8679

Cell Dimensions:

a = 13.562, b = 13.406, c = 11.636, Z = 2; alpha = 115.72°, beta = 107.66°, gamma = 92.86° V = 1,813.88 Den(Calc)= 2.62

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

Physical Properties of Albrechtschraufite

Color:

Yellow green.

Density:

2.6

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Albrechtschraufite

Optical Data:

NCalc= 1.51 - from Gladstone-Dale relationship (KC = 0.1895) where Ncalc=Dcalc*KC+1
NCalc= 1.49 - from Gladstone-Dale relationship (KC = 0.1895) where Ncalc=Dmeas*KC+1

Calculated Properties of Albrechtschraufite

Electron Density:

Bulk Density (Electron Density)=2.53 gm/cc
note: Specific Gravity of Albrechtschraufite =2.67 gm/cc.

Fermion Index:

Fermion Index = 0.0050188888
Boson Index = 0.9949811112

Photoelectric:

PE_{Albrechtschraufite}= 800.51 barns/electron
U=PE_{Albrechtschraufite} x r_electron=2,022.22 barns/cc.

Radioactivity:

GRapi = 2,686,675.89 (Gamma Ray American Petroleum Institute Units)
Concentration of Albrechtschraufite per GRapi unit = 372.21 (PPB)

Albrechtschraufite 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) 11.32 ± 2.83 grams of pure Albrechtschraufite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1132.1 ±283.03 grams of pure Albrechtschraufite .

**Estimated Radioactivity from Albrechtschraufite** - 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 / 8.94 cm	59,632,813	1.61E-03	2,686,675.89	883.29
100 gm / 4.15 cm	5,963,281	1.61E-04	268,667.59	88.33
10 gm / 1.93 cm	596,328	1.61E-05	26,866.76	8.83
1 gm / 8.94 mm	59,633	1.61E-06	2,686.68	0.88
0.1 gm / 4.15 mm	5,963	1.61E-07	268.67	0.09
0.01 gm / 1.93 mm	596	1.61E-08	26.87	0.01
0.001 gm / 0.89 mm	60	1.61E-09	2.69	0.00

Weight of pure Albrechtschraufite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.67 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

Albrechtschraufite Classification

Dana Class:

16b.07.11.01 (16b)Carbonates - Hydroxyl or Halogen

(16b.07)Dana Type

(16b.07.11)Dana Group

16b.07.11.01 Albrechtschraufite Ca4Mg(UO2)2(CO3)6F2•17(H2O) P1 1

Strunz Class:

05.ED.15 05 - CARBONATES (NITRATES)

05.E - Uranyl Carbonates

05.ED -UO2:CO3 = 1:3

05.ED.15 Albrechtschraufite Ca4Mg(UO2)2(CO3)6F2•17(H2O) P1 1

Other Albrechtschraufite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Dana8)

See Also:

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

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Albrechtschraufite

Ca4Mg(UO2)2(CO3)6F2•17(H2O)
Dana No: 16b.07.11.01 Strunz No: 05.ED.15
Locality:

Notes: