Karnasurtite-(Ce) Mineral Data

Karnasurtite-(Ce) Mineral Data +

General Karnasurtite-(Ce) Information

Chemical Formula:

(Ce,La,Th)(Ti,Nb)(Al,Fe+++)(Si,P)2O7(OH)4·3(H2O) (?)

Composition:

Molecular Weight = 450.31 gm

Sodium 0.77 % Na 1.03 % Na₂O

Lanthanum 4.32 % La 5.06 % La₂O₃

Cerium 16.80 % Ce 19.68 % Ce₂O₃

Thorium 6.18 % Th 7.04 % ThO₂

Magnesium 0.59 % Mg 0.98 % MgO

Titanium 8.08 % Ti 13.48 % TiO₂

Niobium 6.40 % Nb 9.15 % Nb₂O₅

Aluminum 4.37 % Al 8.26 % Al₂O₃

Iron 1.24 % Fe 1.60 % FeO

Silicon 10.60 % Si 22.68 % SiO₂

Phosphorus 1.58 % P 3.62 % P₂O₅

Hydrogen 0.78 % H 7.00 % H₂O

Oxygen 37.31 % O

Fluorine 0.97 % F 0.97 % F

- % F -0.41 % -O=F₂

______ ______

100.00 % 102.97 % = TOTAL OXIDE

Empirical Formula:

Ce_0.54Na_0.15La_0.14Th_0.12Ti_0.76Nb_0.31Al_0.73Mg_0.11Fe²⁺_0.1Si_1.7P_0.23O₇(OH)_3.5F_0.23

Environment:

Zoned pegmatitic stock associated with other alkalic minerals.

IMA Status:

Approved IMA 1959

Locality:

Vein No. 2, Mt. Karnasurt, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

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Karnasurtite-(Ce) Crystallography

Axial Ratios:

a:c = 1:0.68867

Cell Dimensions:

a = 10.6, c = 7.3, Z = 3; V = 710.34 Den(Calc)= 3.16

Crystal System:

HexagonalSpace Group: Unk.

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

By Intensity(I/I_o): 2.88(0.7), 3.1(0.7), 3.29(0.6),

Physical Properties of Karnasurtite-(Ce)

Cleavage:

[???] Good

Color:

Yellow, Honey, Light yellow.

Density:

2.89 - 2.95, Average = 2.92

Diaphaniety:

Semitransparent

Fracture:

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

Habit:

Metamict - Mineral originally crystalline, now amorphous due to radiation damage.

Hardness:

2 - Gypsum

Luster:

Greasy (Oily)

Streak:

light yellow

Optical Properties of Karnasurtite-(Ce)

Gladstone-Dale:

CI meas= 0.087 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.156 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1918,KPDmeas= 0.2075,KC= 0.2272

Optical Data:

Uniaxial (-), e=1.595, w=1.617, bire=0.0220.

Calculated Properties of Karnasurtite-(Ce)

Electron Density:

r_electron=2.74 gm/cc
note: r_{Karnasurtite-(Ce)}=2.92 gm/cc.

Fermion Index

Fermion Index = 0.01647
Boson Index = 0.98353

Photoelectric:

PE_{Karnasurtite-(Ce)}= 253.00 barns/electron
U=PE_{Karnasurtite-(Ce)} x r_electron= 693.66 barns/cc.

Radioactivity:

GRapi = 123,861.63 (Gamma Ray American Petroleum Institute Units)

Karnasurtite-(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) 245.57 ± 61.39 grams of pure Karnasurtite-(Ce) .

**Estimated Radioactivity from Karnasurtite-(Ce)** - strong
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 / 8.68 cm	2,770,190	7.49E-05	123,861.63	40.72
100 gm / 4.03 cm	277,019	7.49E-06	12,386.16	4.07
10 gm / 1.87 cm	27,702	7.49E-07	1,238.62	0.41
1 gm / 8.68 mm	2,770	7.49E-08	123.86	0.04
0.1 gm / 4.03 mm	277	7.49E-09	12.39	0.00
0.01 gm / 1.87 mm	28	7.49E-10	1.24	0.00
0.001 gm / 0.87 mm	3	7.49E-11	0.12	0.00

Weight of pure Karnasurtite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.92 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

Karnasurtite-(Ce) Classification

Dana Class:

52.4.9.7 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.4)with cations in [6] and/or > [6] coordination

(52.4.9)Silicate apatites

52.4.9.0 Ellestadite* Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 6₃/m 6/m

52.4.9.1 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 6₃/m 6/m

52.4.9.2 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 6₃/m 6/m

52.4.9.3 Fluorellestadite Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 6₃/m 6/m

52.4.9.4 Hydroxylellestadite Ca5(SiO4,SO4)3(OH,Cl,F) P 6₃/m 6/m

52.4.9.5 Chlorellestadite Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 6₃/m 6/m

52.4.9.6 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 6₃/m 6/m

52.4.9.7 Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4·3(H2O)(?) Unk. Hex

52.4.9.8 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 6₃/m 6/m

Strunz Class:

VIII/C.18-10 VIII - Silicates

VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F]

VIII/C.18 - Karnasurtite-(Ce) series

VIII/C.18-10 Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4·3(H2O)(?) Unk. Hex

Other Karnasurtite-(Ce) Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Karnasurtite-(Ce) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas

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Karnasurtite-(Ce)

(Ce,La,Th)(Ti,Nb)(Al,Fe+++)(Si,P)2O7(OH)4·3(H2O) (?)
Dana No: 52.4.9.7 Strunz No: VIII/C.18-10
Locality:

Notes: