Deloneite-(Ce) Mineral Data

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.

Synonym:

IMA1995-036

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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 - PyramidalH-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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Deloneite-(Ce)

Electron Density:

r_electron=3.68 gm/cc
note: r_{Deloneite-(Ce)}=3.94 gm/cc.

Fermion Index

Fermion Index = 0.00997
Boson Index = 0.99003

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)

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	2,203.10	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:

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

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

(41.8.1)Dana Group

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

41.8.1.1 Fluorapatite Ca5(PO4)3F P 6₃/m 6/m

41.8.1.2 Chlorapatite Ca5(PO4)3Cl P 6₃/m 6/m

41.8.1.3 Hydroxylapatite Ca5(PO4)3(OH) P 6₃/m 6/m

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

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

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

41.8.1.6a Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

41.8.1.6b Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

41.8.1.7 Strontium-apatite (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

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

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

Strunz Class:

VII/B.38-05 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.38 - Daqingshanite-(Ce) series

VII/B.38-05 Deloneite-(Ce) NaCa2SrCe(PO4)3F P 3 3

VII/B.38-10 Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(PO4)(CO3)3-x(OH,F)x R 3m, R 3m or R 32 Trig

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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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

Deloneite-(Ce)

NaCa2SrCe(PO4)3F
Dana No: 41.8.1.9 Strunz No: VII/B.38-05
Locality:

Notes: