Mineevite-(Y) Mineral Data

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General Mineevite-(Y) Information

Chemical Formula:

Na25Ba(Y,Gd,Dy)2(HCO3)4(CO3)11(SO4)2ClF2

Composition:

Molecular Weight = 2,115.35 gm

Barium 6.49 % Ba 7.25 % BaO

Sodium 27.17 % Na 36.62 % Na₂O

Gadolinium 4.46 % Gd 5.14 % Gd₂O₃

Dysprosium 1.54 % Dy 1.76 % Dy₂O₃

Yttrium 5.04 % Y 6.40 % Y₂O₃

Hydrogen 0.19 % H 1.70 % H₂O

Carbon 8.52 % C 31.21 % CO₂

Sulfur 3.03 % S 7.57 % SO₃

Chlorine 1.68 % Cl 1.68 % Cl

- % Cl -0.38 % -O=Cl₂

Oxygen 40.09 % O

Fluorine 1.80 % F 1.80 % F

- % F -0.76 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂₅BaY_1.2Gd_0.6Dy_0.2(HCO₃)₄(CO₃)₁₁(SO₄)₂ClF₂

IMA Status:

Approved IMA 1992

Locality:

Mount Alluaiv, Lovozero Massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Dimitry A. Mineev (1935-1992), Russian mineralogist and Geochemist.

Name Pronunciation:

Mineevite-(Y) + Pronunciation

Synonym:

ICSD 39649

PDF 46-1420

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Mineevite-(Y) Crystallography

Axial Ratios:

a:c = 1:4.2027

Cell Dimensions:

a = 8.811, c = 37.03, Z = 2; V = 2,489.63 Den(Calc)= 2.82

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6₃/m

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

By Intensity(I/I_o): 2.829(1), 2.27(0.9), 2.531(0.71),

Crystal Structure:

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Yamonva N A , Pushcharovskii D Y , Vyatkin S V , Khomyakov A P , Soviet Physics Crystallography , 37 (1992) p.753-756, Crystal structure of the new native sulfate-carbonate, Na25BaTR2(CO3)11(HCO3)4(SO4)2F2Cl, Locality: Lovozero pegmatites, Kola peninsula, Russia, Note: OH occupancies chosen to reproduce chemical formula

Physical Properties of Mineevite-(Y)

Cleavage:

{0001} Perfect

Color:

Green, Yellowish green, Colorless.

Density:

2.85

Diaphaneity:

Transparent

Habit:

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

Hardness:

4 - Fluorite

Luminescence:

Fluorescent, Short UV=weak yellow green, Long UV=weak yellow green.

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Mineevite-(Y)

Gladstone-Dale:

CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1855,KPDmeas= 0.1835,KC= 0.1893
Ncalc = 1.53 - 1.54

Optical Data:

Uniaxial (-), e=1.51, w=1.536, bire=0.0260.

Calculated Properties of Mineevite-(Y)

Electron Density:

Bulk Density (Electron Density)=2.70 gm/cc
note: Specific Gravity of Mineevite-(Y) =2.82 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_{Mineevite-(Y)}= 75.80 barns/electron
U=PE_{Mineevite-(Y)} x r_electron= 205.01 barns/cc.

Radioactivity:

GRapi = 6,134.70 (Gamma Ray American Petroleum Institute Units)
Concentration of Mineevite-(Y) per GRapi unit = 163.01 (PPM)

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

**Estimated Radioactivity from Mineevite-(Y)** - mild
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 / 8.78 cm	134,325	3.63E-06	6,134.70	2.02
100 gm / 4.08 cm	13,433	3.63E-07	613.47	0.20
10 gm / 1.89 cm	1,343	3.63E-08	61.35	0.02
1 gm / 8.78 mm	134	3.63E-09	6.13	0.00
0.1 gm / 4.08 mm	13	3.63E-10	0.61	0.00
0.01 gm / 1.89 mm	1	3.63E-11	0.06	0.00
0.001 gm / 0.88 mm	0	3.63E-12	0.01	0.00

Weight of pure Mineevite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.82 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 ( 0.30 % Th) From Sum REE Elements ( 6.00 % REE)

Mineevite-(Y) Classification

Dana Class:

17.01.14.01 (17)Compound Carbonates

(17.01)with miscellaneous formulae

(17.01.14)Dana Group

17.01.14.01 Mineevite-(Y) Na25Ba(Y,Gd,Dy)2(HCO3)4(CO3)11(SO4)2ClF2 P 6₃/m 6/m

17.01.14.02 Reederite-(Y)! Na15Y2(CO3)9(SO3F)Cl P 6 6

Strunz Class:

05.BF.25 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BF -With (Cl), SO4, PO4, TeO3

05.BF.25 Mineevite-(Y) Na25Ba(Y,Gd,Dy)2(HCO3)4(CO3)11(SO4)2ClF2 P 6₃/m 6/m

Other Mineevite-(Y) Information

References:

PHYS. PROP.(Am.Min.,Vol.79,p764,1994;Dana8) OPTIC PROP.(Am.Min.,Vol.79,p764,1994)

See Also:

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

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Print or Cut-and-Paste your Mineevite-(Y) Specimen Label here :

Mineevite-(Y)

Na25Ba(Y,Gd,Dy)2(HCO3)4(CO3)11(SO4)2ClF2
Dana No: 17.01.14.01 Strunz No: 05.BF.25
Locality:

Notes: