Abenakiite-(Ce) Mineral Data (original) (raw)

General Abenakiite-(Ce) Information

Help on Chemical Formula: Chemical Formula:

Na26REE6(SiO3)6(PO4)6(CO3)6(S++++O2)O

Help on Composition: Composition:

Molecular Weight = 2,928.18 gm

Sodium 20.41 % Na 27.52 % Na2O

La,Ce,Pr,Nd,Sm, 29.51 % RE 34.42 % REE2O3

Silicon 5.75 % Si 12.31 % SiO2

Phosphorus 6.35 % P 14.54 % P2O5

Carbon 2.46 % C 9.02 % CO2

Sulfur 1.10 % S 2.19 % SO2

Oxygen 34.42 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Na26REE6(SiO3)6(PO4)6(CO3)6(SO2)O

Help on Environment: Environment:

A single crystal embedded in sodalite in a xenolith of sodalite syenite.

Help on IMA Status: IMA Status:

Approved IMA 1994

Help on Locality: Locality:

Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

For the Abenaki Indian tribe, which inhabited the area around Mont Saint-Hilaire.

Help on Name Pronunciation: Name Pronunciation:

Abenakiite-(Ce) + Pronunciation Say ABENAKIITE-(CE)

Help on Synonym: Synonym:

ICSD 79159

IMA1991-054

PDF 47-1858

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Abenakiite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:1.23367

Help on Cell Dimensions: Cell Dimensions:

a = 16.018, c = 19.761, Z = 3; V = 4,390.93 Den(Calc)= 3.32

Help on Crystal System: Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.674(1), 3.773(0.9), 8.036(0.85),

Click Here for Large Abenakiite-(Ce) Structure Window Crystal Structure:

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| | McDonald A M , Chao G Y , Grice J D , The Canadian Mineralogist , 32 (1994) p.843-854, Abenakiite-(Ce), a new silicophosphate carbonate mineral from Mont, Saint-Hilaire, Quebec: description and structure determination, Locality: Mont Saint-Hilaire, Quebec, Canada | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Abenakiite-(Ce)

Help on Cleavage: Cleavage:

{0001} Poor

Help on Color: Color:

Pale brown.

Help on Density: Density:

3.21

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Help on Habit: Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Help on Hardness: Hardness:

4 - Fluorite

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Abenakiite-(Ce)

Help on Dichroism (e): Dichroism (e):

None.

Help on Dichroism (w): Dichroism (w):

None.

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.051 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.177,KPDmeas= 0.183,KC= 0.1741
Ncalc = 1.56 - 1.58

Help on Optical Data: Optical Data:

Uniaxial (-), e=1.586, w=1.589, bire=0.0030.

Calculated Properties of Abenakiite-(Ce)

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.13 gm/cc
note: Specific Gravity of Abenakiite-(Ce) =3.32 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Help on Photoelectric: Photoelectric:

PEAbenakiite-(Ce) = 178.05 barns/electron
U=PEAbenakiite-(Ce) x relectron= 557.99 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 29,815.33 (Gamma Ray American Petroleum Institute Units)
Concentration of Abenakiite-(Ce) per GRapi unit = 33.54 (PPM)

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

Estimated Radioactivity from Abenakiite-(Ce) - weak

SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor One Hour
1000 gm / 8.32 cm 663,314 1.79E-05 29,815.33 9.80
100 gm / 3.86 cm 66,331 1.79E-06 2,981.53 0.98
10 gm / 1.79 cm 6,633 1.79E-07 298.15 0.10
1 gm / 8.32 mm 663 1.79E-08 29.82 0.01
0.1 gm / 3.86 mm 66 1.79E-09 2.98 0.00
0.01 gm / 1.79 mm 7 1.79E-10 0.30 0.00
0.001 gm / 0.83 mm 1 1.79E-11 0.03 0.00

Weight of pure Abenakiite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.32 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 ( 1.48 % Th) From Sum REE Elements (29.51 % REE)

Abenakiite-(Ce) Classification

Help on Dana Class: Dana Class:

61.04.01.01 (61)Cyclosilicate Six-Membered Rings

(61.04)with other anions

(61.04.01)Dana Group

61.04.01.01 Abenakiite-(Ce) Na26REE6(SiO3)6(PO4)6(CO3)6(SO2)O R 3m 3 2/m

Help on Strunz Class: Strunz Class:

09.CK.10 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CK -[Si6O18]12- 6-membered single rings, with insular complex anions

09.CK.10 Abenakiite-(Ce) Na26REE6(SiO3)6(PO4)6(CO3)6(SO2)O R 3m 3 2/m

Other Abenakiite-(Ce) Information

Help on References: References:

NAME( MinRec) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(MinRec)

Help on See Also: See Also:

Links to other databases for Abenakiite-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Abenakiite-(Ce) Specimen Label here :

Abenakiite-(Ce)

Na26REE6(SiO3)6(PO4)6(CO3)6(S++++O2)O
Dana No: 61.04.01.01 Strunz No: 09.CK.10
Locality:

Notes: