Deloneite-(Ce) Mineral Data

General Deloneite-(Ce) Information

Chemical Formula:

NaCa2SrCe(PO4)3F

Composition:

Molecular Weight = 634.79 gm

Sodium 3.62 % Na 4.88 % Na₂O

Strontium 13.80 % Sr 16.32 % SrO

Calcium 12.63 % Ca 17.67 % CaO

Cerium 22.07 % Ce 25.85 % Ce₂O₃

Phosphorus 14.64 % P 33.54 % P₂O₅

Oxygen 30.24 % O

Fluorine 2.99 % F 2.99 % F

- % F -1.26 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaCa₂SrCe(PO₄)₃F

Environment:

Carbonitite igneous rocks.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

Mount Koashva, Khibina alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

For B. N. Delone (Delaunay) (1890-1980), Russian mathematical crystallographer.

Name Pronunciation:

Deloneite-(Ce) + Pronunciation

Synonym:

IMA1995-036

Deloneite-(Ce) Image

Images:

Deloneite-(Ce)

Comments: Pale yellow deloneite-(Ce) in matrix.
Location: Koashva Mt., Chibiny, Kola, Russia. Scale: Specimen Size 1.5x2.5 cm.
© Diederik Visser

Deloneite-(Ce) Crystallography

Axial Ratios:

a:c = 1:0.73711

Cell Dimensions:

a = 9.51, c = 7.01, Z = 2; V = 549.05 Den(Calc)= 3.84

Crystal System:

Trigonal - Pyramidal H-M Symbol (3) Space Group: P 3

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

By Intensity(I/I_o): 2.84(1), 2.753(0.4), 3.12(0.4),

Physical Properties of Deloneite-(Ce)

Cleavage:

{100} Fair, {001} Fair

Color:

Bright yellow.

Density:

3.92 - 3.95, Average = 3.93

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Deloneite-(Ce)

Gladstone-Dale:

CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1747,KPDmeas= 0.1705,KC= 0.1701
Ncalc = 1.65 - 1.67

Optical Data:

Uniaxial (-), e=1.66, w=1.682, bire=0.0220.

Calculated Properties of Deloneite-(Ce)

Electron Density:

Bulk Density (Electron Density)=3.68 gm/cc
note: Specific Gravity of Deloneite-(Ce) =3.94 gm/cc.

Fermion Index:

Fermion Index = 0.009977685
Boson Index = 0.990022315

Photoelectric:

PE_{Deloneite-(Ce)}= 126.94 barns/electron
U=PE_{Deloneite-(Ce)} x r_electron= 467.40 barns/cc.

Radioactivity:

GRapi = 22,031.05 (Gamma Ray American Petroleum Institute Units)
Concentration of Deloneite-(Ce) per GRapi unit = 45.39 (PPM)

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

**Estimated Radioactivity from Deloneite-(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 / 7.86 cm	494,425	1.34E-05	22,031.05	7.24
100 gm / 3.65 cm	49,443	1.34E-06	2,203.11	0.72
10 gm / 1.69 cm	4,944	1.34E-07	220.31	0.07
1 gm / 7.86 mm	494	1.34E-08	22.03	0.01
0.1 gm / 3.65 mm	49	1.34E-09	2.20	0.00
0.01 gm / 1.69 mm	5	1.34E-10	0.22	0.00
0.001 gm / 0.79 mm	0	1.34E-11	0.02	0.00

Weight of pure Deloneite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.94 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 ( 1.10 % Th) From Sum REE Elements (22.07 % REE)

Deloneite-(Ce) Classification

Dana Class:

41.08.01.09 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.08)where (A)5 (XO4)3 Zq

(41.08.01)Apatite Group

41.08.01.00 Apatite* Ca5(PO4)3(OH,F,Cl) P 6₃/m 6/m

41.08.01.01 Apatite-(CaF) Ca5(PO4)3F P 6₃/m 6/m

41.08.01.02 Apatite-(CaCl) Ca5(PO4)3Cl P 6₃/m 6/m

41.08.01.03 Apatite-(CaOH) Ca5(PO4)3(OH) P 6₃/m 6/m

41.08.01.04 Carbonate-fluorapatite? Ca5(PO4,CO3)3F P 6₃/m 6/m

41.08.01.05 Carbonate-hydroxylapatite? Ca5(PO4,CO3)3(OH) P 6₃/m 6/m

41.08.01.06 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3

41.08.01.06a Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

41.08.01.06b Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

41.08.01.07 Apatite-(SrOH) (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

41.08.01.08 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 6₃ 6

41.08.01.09 Deloneite-(Ce)! NaCa2SrCe(PO4)3F P 3 3

41.08.01.10 IMA2008-009! Sr5(PO4)3F P 6₃/m 6/m 2/m 2/m

41.08.01.11 IMA2008-068! Ca2Pb3(PO4)3F P 6₃/m 6/m

41.08.01.12 Phosphohedyphane! Ca2Pb3(PO4)3Cl P 6₃/m 6/m

Strunz Class:

08.BN.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BN -With only large cations, (OH, etc.):RO4 = 0.33:1

08.BN.05 Alforsite Ba5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite* Ca5(PO4)3(OH,F,Cl) P 6₃/m 6/m

08.BN.05 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3

08.BN.05 Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

08.BN.05 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 6₃/m 6/m

08.BN.05 Deloneite-(Ce)! NaCa2SrCe(PO4)3F P 3 3

08.BN.05 Johnbaumite Ca5(AsO4)3(OH) P 6₃/m,P 6₃ Hex

08.BN.05 Apatite-(CaOH) Ca5(PO4)3(OH) P 6₃/m 6/m

08.BN.05 Apatite-(CaCl) Ca5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Carbonate-fluorapatite? Ca5(PO4,CO3)3F P 6₃/m 6/m

08.BN.05 Carbonate-hydroxylapatite? Ca5(PO4,CO3)3(OH) P 6₃/m 6/m

08.BN.05 Clinomimetite Pb5(AsO4)3Cl P 2₁/b 2/m

08.BN.05 Apatite-(CaF) Ca5(PO4)3F P 6₃/m 6/m

08.BN.05 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 6₃ 6

08.BN.05 Hedyphane Ca2Pb3(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Mimetite Pb5(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(SrOH) (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

08.BN.05 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 6₃/m,P 6₃ Hex

08.BN.05 Pyromorphite Pb5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Vanadinite Pb5(VO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(CaOH)-M! (Ca,Na)5[(P,S)O4]3(OH,Cl) P 2₁/b 2/m

08.BN.05 IMA2008-068! Ca2Pb3(PO4)3F P 6₃/m 6/m

08.BN.05 Svabite Ca5(AsO4)3F P 6₃/m 6/m

08.BN.05 Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

08.BN.05 Turneaureite Ca5[(As,P)O4]3Cl P 6₃/m 6/m

08.BN.05 Phosphohedyphane! Ca2Pb3(PO4)3Cl P 6₃/m 6/m

08.BN.05 IMA2008-009! Sr5(PO4)3F P 6₃/m 6/m 2/m 2/m

08.BN.05 Hydroxylpyromorphite! Pb5(PO4)3OH P 6₃/m 6/m

Other Deloneite-(Ce) Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.82,p820,1997) OPTIC PROP.(MinRec)

See Also:

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

Deloneite-(Ce)

NaCa2SrCe(PO4)3F
Dana No: 41.08.01.09 Strunz No: 08.BN.05
Locality:

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