Zugshunstite-(Ce) Mineral Data

General Zugshunstite-(Ce) Information

Chemical Formula:

(Ce,Nd,La)Al(SO4)2(C2O4)•8(H2O)

Composition:

Molecular Weight = 667.51 gm

Lanthanum 2.08 % La 2.44 % La₂O₃

Cerium 10.50 % Ce 12.29 % Ce₂O₃

Praeseodymium 2.11 % Pr 2.47 % Pr₂O₃

Aluminum 3.64 % Al 6.87 % Al₂O₃

Iron 0.84 % Fe 1.20 % Fe₂O₃

Hydrogen 3.62 % H 32.39 % H₂O

Carbon 3.60 % C 10.79 % C₂O₃

Sulfur 9.61 % S 23.99 % SO₃

Neodymium 6.48 % Nd 7.56 % Nd₂O₃

Oxygen 57.53 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ce_0.5Nd_0.3La_0.1Pr_0.1Al_0.9Fe³⁺_0.1(SO₄)₂(C₂O₄)·12(H₂O)

Environment:

Associated with epsomite and "hair salts" in soil sheltered by an overhanging bluff. The sulfate is from the oxidation of pyritiferous shales in the bedrock. The cerium dominant ana log of levinsonite-(Y).

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

Alum Cave Bluff, Great Smoky Mountains Park, Tennessee, USA. Link to MinDat.org Location Data.

Name Origin:

Named for the Cherokee Indian term for the Great Smoky Mountains.

Synonym:

IMA1996-055

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Zugshunstite-(Ce) Crystallography

Axial Ratios:

a:b:c =0.476:1:0.7168

Cell Dimensions:

a = 8.718, b = 18.313, c = 13.128, Z = 4; beta = 93.9° V = 2,091.07 Den(Calc)= 2.12

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 7.9(1)(110), 3.93(0.7)(023,220,113,125.01(0.4)(130), 5.36(0.4)(022), 3.07(0.2)(114,024,060), 3.29(0.2)(115,222,004), 3.74(0.2)(042,2

Crystal Structure:

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Rouse R C , Peacor D R , Essene E J , Coskren T D , Lauf R J , Geochimica et Cosmochimica Acta , 65 (2001) p.1101-1115, The new minerals levinsonite-(Y) [(Y,Nd,Ce)Al(SO4)2(C2O4)*12H2O] and, zugshunstite-(Ce) [(Ce,Nd,La)Al(SO4)2(C2O4)*12H2O]: coexisting oxalates with, different structures and differentiation of LREE and HREE, Locality: Alum Cave Bluff, Great Smoky Mountains National Park, Tennessee

Physical Properties of Zugshunstite-(Ce)

Cleavage:

{010} Poor

Color:

Pink, Very pale blue.

Diaphaneity:

Transparent

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Water Soluble - Water soluble mineral.

Habit:

Wedge shaped - Crystals shaped like a wedge.

Luminescence:

Fluorescent, Short UV=very pale blue, Long UV=very pale blue.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Zugshunstite-(Ce)

Gladstone-Dale:

CI calc= -0.122 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2308,KC= 0.2057
Ncalc = 1.44

Optical Data:

Biaxial (+), a=1.455, b=1.485, g=1.528, bire=0.0730, 2V(Calc)=82, 2V(Meas)=85. Dispersion medium, r > v.

Calculated Properties of Zugshunstite-(Ce)

Electron Density:

Bulk Density (Electron Density)=2.11 gm/cc
note: Specific Gravity of Zugshunstite-(Ce) =2.12 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Zugshunstite-(Ce)}= 103.22 barns/electron
U=PE_{Zugshunstite-(Ce)} x r_electron= 218.27 barns/cc.

Radioactivity:

GRapi = 22,523.37 (Gamma Ray American Petroleum Institute Units)
Concentration of Zugshunstite-(Ce) per GRapi unit = 44.40 (PPM)

Zugshunstite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Zugshunstite-(Ce)** - weak
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 9.66 cm	474,205	1.28E-05	22,523.37	7.40
100 gm / 4.48 cm	47,421	1.28E-06	2,252.34	0.74
10 gm / 2.08 cm	4,742	1.28E-07	225.23	0.07
1 gm / 9.66 mm	474	1.28E-08	22.52	0.01
0.1 gm / 4.48 mm	47	1.28E-09	2.25	0.00
0.01 gm / 2.08 mm	5	1.28E-10	0.23	0.00
0.001 gm / 0.97 mm	0	1.28E-11	0.02	0.00

Weight of pure Zugshunstite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.12 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
Estimated Thorium Activity ( 1.06 % Th) From Sum REE Elements (21.17 % REE)

Zugshunstite-(Ce) Classification

Dana Class:

50.01.09.01 (50)Salts of Organic Acids

(50.01)(Oxalates)

(50.01.09)Zugshunstite Group

50.01.09.01 Zugshunstite-(Ce)! (Ce,Nd,La)Al(SO4)2(C2O4)•8(H2O) C 2/c 2/m

50.01.09.02 Coskrenite-(Ce)! (Ce,Nd,La)2(SO4)2(C2O4)•8(H2O) C 2/c 2/m

50.01.09.03 Levinsonite-(Y)! (Y,Nd,La)Al(SO4)2(C2O4)•12(H2O) P 2/n 2/m

Strunz Class:

10.AB.75 10 - ORGANIC COMPOUNDS

10.A - Salts of Organic Acids

10.AB -Oxalates

10.AB.75 Zugshunstite-(Ce)! (Ce,Nd,La)Al(SO4)2(C2O4)•8(H2O) C 2/c 2/m

Other Zugshunstite-(Ce) Information

References:

NAME( AmMin, vol 86, p1536) PHYS. PROP.(AmMin, vol 86, p1536) OPTIC PROP.(AmMin, vol 86, p1536)

See Also:

Links to other databases for Zugshunstite-(Ce) :
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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Print or Cut-and-Paste your Zugshunstite-(Ce) Specimen Label here :

Zugshunstite-(Ce)

(Ce,Nd,La)Al(SO4)2(C2O4)•8(H2O)
Dana No: 50.01.09.01 Strunz No: 10.AB.75
Locality:

Notes: