Schrockingerite Mineral Data

Schrockingerite Mineral Data +

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General Schrockingerite Information

Chemical Formula:

NaCa3(UO2)(CO3)3(SO4)F·10(H2O)

Composition:

Molecular Weight = 888.49 gm

Sodium 2.59 % Na 3.49 % Na₂O

Calcium 13.53 % Ca 18.93 % CaO

Uranium 26.79 % U 30.39 % UO₂

Hydrogen 2.27 % H 20.28 % H₂O

Carbon 4.06 % C 14.86 % CO₂

Sulfur 3.61 % S 9.01 % SO₃

Oxygen 45.02 % O

Fluorine 2.14 % F 2.14 % F

- % F -0.90 % -O=F₂

______ ______

100.00 % 98.20 % = TOTAL OXIDE

Empirical Formula:

NaCa₃(UO₂)(CO₃)₃(SO₄)F·10(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1783

Locality:

Jochymov, Bohemia, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named after Julius Freiherr Schrockinger von Neudenberg (1814-1882), who found and described the U occurrence at Jochymov, Bohemia, Czech Republic.

Synonym:

Schroeckingerite

Schrockingerite Image

Images:

Schrockingerite

Comments: Pale greenish-yellow schr?ckingerite aggregates on matrix.
Location: St Christoph Mine, B?renhecke, Glash?tte, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Schrockingerite

Comments: Pale greenish-yellow, platy schr?ckingerite on matrix.
Location: Jack Daniels No. 1 Mine, Cameron District, Coconino County, Arizona, USA. Scale: See Photo.
© Paul M. Schumacher

Schrockingerite Crystallography

Axial Ratios:

a:b:c =0.5757:1:0.8472

Cell Dimensions:

a = 9.69, b = 16.83, c = 14.26, Z = 4; V = 2,325.56 Den(Calc)= 2.54

Crystal System:

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

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

By Intensity(I/I_o): 7.26(1), 4.796(0.8), 8.48(0.7),

Crystal Structure:

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Mereiter K , Tschermaks Mineralogische und Petrographische Mitteilungen , 35 (1986) p.1-18, Crystal structure and crystallographic properties of a schrockingerite from Joachimsthal, Locality: Joachimsthal, Czech Republic

Physical Properties of Schrockingerite

Cleavage:

[001] Perfect

Color:

Yellow.

Density:

2.55

Diaphaniety:

Transparent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).

Hardness:

2.5 - Finger Nail

Luminescence:

Fluorescent and radioactive, Short UV=yellow green, Long UV=yellow green.

Luster:

Vitreous - Pearly

Optical Properties of Schrockingerite

Gladstone-Dale:

CI meas= -0.066 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.07 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2076,KPDmeas= 0.2068,KC= 0.194

Optical Data:

Biaxial (-), a=1.495, b=1.543, g=1.544, bire=0.0490

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Schrockingerite

Electron Density:

r_electron=2.45 gm/cc
note: r_{Schrockingerite}=2.55 gm/cc.

Fermion Index

Fermion Index = 0.00304
Boson Index = 0.99696

Photoelectric:

PE_{Schrockingerite}= 635.97 barns/electron
U=PE_{Schrockingerite} x r_electron=1,555.12 barns/cc.

Radioactivity:

GRapi = 2,189,746.38 (Gamma Ray American Petroleum Institute Units)

Schrockingerite 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) 13.89 ± 3.47 grams of pure Schrockingerite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1389.0 ±347.26 grams of pure Schrockingerite .

**Estimated Radioactivity from Schrockingerite** - 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 / 9.08 cm	47,954,369	1.30E-03	2,189,746.38	719.92
100 gm / 4.22 cm	4,795,437	1.30E-04	218,974.64	71.99
10 gm / 1.96 cm	479,544	1.30E-05	21,897.46	7.20
1 gm / 9.08 mm	47,954	1.30E-06	2,189.75	0.72
0.1 gm / 4.22 mm	4,795	1.30E-07	218.97	0.07
0.01 gm / 1.96 mm	480	1.30E-08	21.90	0.01
0.001 gm / 0.91 mm	48	1.30E-09	2.19	0.00

Weight of pure Schrockingerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.55 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

Schrockingerite Classification

Dana Class:

17.1.5.1 (17)Compound Carbonates

(17.1)with miscellaneous formulae

(17.1.5)Dana Group

17.1.5.1 Schrockingerite NaCa3(UO2)(CO3)3(SO4)F·10(H2O) C mmm 2/m 2/m 2/m

Strunz Class:

VI/D.21-20 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Uranylsulfates [UO2]4+ - [SO4]2-

VI/D.21 - Johannite - Schröckingerite series

VI/D.21-10 Johannite Cu(UO2)2(SO4)2(OH)2·8(H2O) P1 1

VI/D.21-20 Schrockingerite NaCa3(UO2)(CO3)3(SO4)F·10(H2O) C mmm 2/m 2/m 2/m

VI/D.21-30 Marecottite! Mg3(H2O)18[(UO2)4O3(SO4)2]2·10(H2O) P1 1

Other Schrockingerite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Schrockingerite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 - WWW-MINCRYST

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Schrockingerite

NaCa3(UO2)(CO3)3(SO4)F·10(H2O)
Dana No: 17.1.5.1 Strunz No: VI/D.21-20
Locality:

Notes: