Carbocernaite Mineral Data

Carbocernaite Mineral Data

General Carbocernaite Information

Chemical Formula:

(Ca,Na)(Sr,Ce,Ba)(CO3)2

Composition:

Molecular Weight = 264.16 gm

Barium 5.20 % Ba 5.80 % BaO

Sodium 2.18 % Na 2.93 % Na₂O

Strontium 19.90 % Sr 23.54 % SrO

Calcium 11.38 % Ca 15.92 % CaO

Cerium 15.91 % Ce 18.64 % Ce₂O₃

Carbon 9.09 % C 33.32 % CO₂

Oxygen 36.34 % O

______ ______

100.00 % 100.15 % = TOTAL OXIDE

Empirical Formula:

Ca_0.75Na_0.25Sr_0.6Ce_0.3Ba_0.1(CO₃)₂

IMA Status:

Approved IMA 1961

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 201461

PDF 25-175

Carbocernaite Image

Images:

Carbocernaite

Comments: Light brownish massive carbocernaite.
Location: Olenii (Oleny) Ruchei Stream apatite deposit, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Carbocernaite Crystallography

Axial Ratios:

a:b:c =0.8806:1:0.7141

Cell Dimensions:

a = 6.41, b = 7.279, c = 5.198, Z = 2; V = 242.53 Den(Calc)= 3.62

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P mc2₁

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

By Intensity(I/I_o): 2.989(1), 4.05(0.5), 4.81(0.5),

Physical Properties of Carbocernaite

Cleavage:

[100] Indistinct, [021] Indistinct, [010] Indistinct

Color:

Brown, Colorless, Yellow, Yellow brown, White.

Density:

3.53

Diaphaniety:

Transparent to Translucent

Fracture:

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

Hardness:

3 - Calcite

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Carbocernaite

Gladstone-Dale:

CI meas= -0.039 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1801,KPDmeas= 0.1847,KC= 0.1777

Optical Data:

Biaxial (-), a=1.569, b=1.679, g=1.708, bire=0.1390, 2V(Calc)=50, 2V(Meas)=52.

Calculated Properties of Carbocernaite

Electron Density:

r_electron=3.39 gm/cc
note: r_{Carbocernaite}=3.62 gm/cc.

Fermion Index

Fermion Index = 0.02452
Boson Index = 0.97548

Photoelectric:

PE_{Carbocernaite}= 124.93 barns/electron
U=PE_{Carbocernaite} x r_electron= 423.03 barns/cc.

Radioactivity:

GRapi = 15,876.76 (Gamma Ray American Petroleum Institute Units)

Carbocernaite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Carbocernaite** - 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 / 8.08 cm	356,436	9.63E-06	15,876.76	5.22
100 gm / 3.75 cm	35,644	9.63E-07	1,587.68	0.52
10 gm / 1.74 cm	3,564	9.63E-08	158.77	0.05
1 gm / 8.08 mm	356	9.63E-09	15.88	0.01
0.1 gm / 3.75 mm	36	9.63E-10	1.59	0.00
0.01 gm / 1.74 mm	4	9.63E-11	0.16	0.00
0.001 gm / 0.81 mm	0	9.63E-12	0.02	0.00

Weight of pure Carbocernaite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.62 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 ( 0.80 % Th) From Sum REE Elements (15.91 % REE)

Carbocernaite Classification

Dana Class:

14.4.6.1 (14)Anhydrous Carbonates

(14.4)with Compound Formula A+2 B++2 (CO3)4

(14.4.6)Dana Group

14.4.6.1 Carbocernaite (Ca,Na)(Sr,Ce,Ba)(CO3)2 P mc2₁ mm2

Strunz Class:

V/B.05-120 V - Nitrates, Carbonates and Borates

V/B - Waterfree carbonates [CO3]2- without unfamiliar anions

V/B.05 - Eitelie - Shortite - Carbocernaite series

V/B.05-10 Eitelite Na2Mg(CO3)2 R 3 3

V/B.05-20 Nyerereite Na2Ca(CO3)2 C mc2₁ mm2

V/B.05-30 Natrofairchildite Na2Ca(CO3)2 P 6₃/mmc 6/m 2/m 2/m

V/B.05-40 Gregoryite (Na2,K2,Ca)CO3 P 6₃mc 6mm

V/B.05-50 Fairchildite K2Ca(CO3)2 P 6₃/mmc 6/m 2/m 2/m

V/B.05-55 Zemkorite (Na,K)2Ca(CO3)2 P 6₃/mmc, P 6₃mc, P 6₂c- Hex

V/B.05-60 Butschliite K2Ca(CO3)2 R 3m 3 2/m

V/B.05-70 Shortite Na2Ca2(CO3)3 Amm2 mm2

V/B.05-80 Sahamalite-(Ce) (Mg,Fe)Ce2(CO3)4 P 2₁/a 2/m

V/B.05-90 Remondite-(Ce) Na3(Ce,La,Ca,Na,Sr)3(CO3)5 P 2₁ 2

V/B.05-92 Remondite-(La)! Na3(La,Ce,Ca)3(CO3)5 P 2₁ 2

V/B.05-95 Petersenite-(Ce) (Na,Ca)4(Ce,La,Nd)2(CO3)5 P 2₁ 2

V/B.05-98 Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 P 6₃mc 6mm

V/B.05-100 Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 P 6₃/mmc 6/m 2/m 2/m

V/B.05-110 Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 P 6₃mc 6mm

V/B.05-120 Carbocernaite (Ca,Na)(Sr,Ce,Ba)(CO3)2 P mc2₁ mm2

Other Carbocernaite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Carbocernaite

(Ca,Na)(Sr,Ce,Ba)(CO3)2
Dana No: 14.4.6.1 Strunz No: V/B.05-120
Locality:

Notes: