Galgenbergite-(Ce) Mineral Data

General Galgenbergite-(Ce) Information

Chemical Formula:

Ca(REE)2(CO3)4•(H2O)

Composition:

Molecular Weight = 577.84 gm

Calcium 6.87 % Ca 9.61 % CaO

Lanthanum 10.10 % La 11.84 % La₂O₃

Cerium 25.22 % Ce 29.54 % Ce₂O₃

Praeseodymium 2.93 % Pr 3.42 % Pr₂O₃

Hydrogen 0.35 % H 3.12 % H₂O

Carbon 8.31 % C 30.47 % CO₂

Neodymium 10.23 % Nd 11.94 % Nd₂O₃

Oxygen 35.99 % O

______ ______

100.00 % 99.93 % = TOTAL OXIDE

Empirical Formula:

Ca_0.99Ce_1.04La_0.42Nd_0.41Pr_0.12(CO₃)₄•(H₂O)

Environment:

Small fissures in an albite-chlorite schist.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Galgenberg Tunnel, St. Leoben, Steiermark, Austria. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Synonym:

IMA1997-036

Galgenbergite-(Ce) Crystallography

Axial Ratios:

a:b:c =1.0003:1:1.9398

Cell Dimensions:

a = 6.388, b = 6.386, c = 12.388, Z = 2; alpha = 96.54°, beta = 100.85°, gamma = 100.51° V = 484.82 Den(Calc)= 3.96

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 5.049(1)(101), 3.005(0.65)(004), 5.901(0.59)(011), 3.899(0.49)(112), 3.125(0.45)(021), 4.468(0.38)(111), 4.695(0.38)(0

Physical Properties of Galgenbergite-(Ce)

Cleavage:

{001} Perfect

Color:

Colorless, White.

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Splintery - Brittle fracture leaving splintery fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Galgenbergite-(Ce)

Gladstone-Dale:

CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1767,KC= 0.1763
Ncalc = 1.7

Optical Data:

Biaxial (-), a=1.635, b=1.725, g=1.75, bire=0.1150

Calculated Properties of Galgenbergite-(Ce)

Electron Density:

Bulk Density (Electron Density)=3.66 gm/cc
note: Specific Gravity of Galgenbergite-(Ce) =3.98 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Galgenbergite-(Ce)}= 248.93 barns/electron
U=PE_{Galgenbergite-(Ce)} x r_electron= 911.28 barns/cc.

Radioactivity:

GRapi = 47,558.71 (Gamma Ray American Petroleum Institute Units)
Concentration of Galgenbergite-(Ce) per GRapi unit = 21.03 (PPM)

Galgenbergite-(Ce) 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) 639.56 ±159.89 grams of pure Galgenbergite-(Ce) .

**Estimated Radioactivity from Galgenbergite-(Ce)** - weak
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 / 7.83 cm	1,085,844	2.93E-05	47,558.71	15.64
100 gm / 3.63 cm	108,584	2.93E-06	4,755.87	1.56
10 gm / 1.69 cm	10,858	2.93E-07	475.59	0.16
1 gm / 7.83 mm	1,086	2.93E-08	47.56	0.02
0.1 gm / 3.63 mm	109	2.93E-09	4.76	0.00
0.01 gm / 1.69 mm	11	2.93E-10	0.48	0.00
0.001 gm / 0.78 mm	1	2.93E-11	0.05	0.00

Weight of pure Galgenbergite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.98 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 ( 2.42 % Th) From Sum REE Elements (48.48 % REE)

Galgenbergite-(Ce) Classification

Dana Class:

15.04.09.01 (15)Hydrated Carbonates

(15.04)Dana Type

(15.04.09)Dana Group

15.04.09.01 Galgenbergite-(Ce)! Ca(REE)2(CO3)4•(H2O) P1 1

Strunz Class:

05.CC.40 05 - CARBONATES (NITRATES)

05.C - Carbonates without Additional Anions, with H2O

05.CC -With rare-earth elements (REE)

05.CC.40 Galgenbergite-(Ce)! Ca(REE)2(CO3)4•(H2O) P1 1

Other Galgenbergite-(Ce) Information

References:

NAME( CanMin, 42:226) PHYS. PROP.(CanMin, 42:226) OPTIC PROP.(CanMin, 42:226)

See Also:

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

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Galgenbergite-(Ce)

Ca(REE)2(CO3)4•(H2O)
Dana No: 15.04.09.01 Strunz No: 05.CC.40
Locality:

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