Loranskite-(Y) Mineral Data

Loranskite-(Y) Mineral Data +

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General Loranskite-(Y) Information

Chemical Formula:

(Y,Ce,Ca)ZrTaO6 (?)

Composition:

Molecular Weight = 464.38 gm

Calcium 2.59 % Ca 3.62 % CaO

Cerium 3.02 % Ce 3.53 % Ce₂O₃

Yttrium 9.57 % Y 12.16 % Y₂O₃

Zirconium 17.68 % Zr 23.88 % ZrO₂

Tantalum 42.86 % Ta 52.34 % Ta₂O₅

Iron 3.61 % Fe 4.64 % FeO

Oxygen 20.67 % O

______ ______

100.00 % 100.17 % = TOTAL OXIDE

Empirical Formula:

Y_0.5Ca_0.3Fe²⁺_0.3Ce_0.1Ta_1.1Zr_0.9O₆

Environment:

An ill-defined mineral of uncertain origin and formula. In a pegmatite.

IMA Status:

Valid Species (Pre-IMA) 1899

Locality:

Impilaks, Lake Ladoga, Finland. Link to MinDat.org Location Data.

Name Origin:

Named for Apollonie Mikhailovich Loranski (1847-1917), inspector and teacher of the Mining Institute, St. Petersburg, Russia.

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Loranskite-(Y) Crystallography

Crystal System:

OrthorhombicSpace Group: Unk

Physical Properties of Loranskite-(Y)

Cleavage:

None

Color:

Brownish black, Green yellow, Yellow, Black.

Density:

4.4 - 4.8, Average = 4.59

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

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

Hardness:

5 - Apatite

Luster:

Sub Metallic

Streak:

greenish gray

Optical Properties of Loranskite-(Y)

Optical Data:

NCalc= 1.79 - from Gladstone-Dale relationship (KC = 0.1715) where Ncalc=Dmeas*KC+1

Calculated Properties of Loranskite-(Y)

Electron Density:

r_electron=4.03 gm/cc
note: r_{Loranskite-(Y)}=4.60 gm/cc.

Fermion Index

Fermion Index = 0.02078
Boson Index = 0.97922

Photoelectric:

PE_{Loranskite-(Y)}= 560.07 barns/electron
U=PE_{Loranskite-(Y)} x r_electron=2,256.85 barns/cc.

Radioactivity:

GRapi = 2,819.31 (Gamma Ray American Petroleum Institute Units)

**Estimated Radioactivity from Loranskite-(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 / 7.46 cm	67,586	1.83E-06	2,819.31	0.93
100 gm / 3.46 cm	6,759	1.83E-07	281.93	0.09
10 gm / 1.61 cm	676	1.83E-08	28.19	0.01
1 gm / 7.46 mm	68	1.83E-09	2.82	0.00
0.1 gm / 3.46 mm	7	1.83E-10	0.28	0.00
0.01 gm / 1.61 mm	1	1.83E-11	0.03	0.00
0.001 gm / 0.75 mm	0	1.83E-12	0.00	0.00

Weight of pure Loranskite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.60 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 ( 0.15 % Th) From Sum REE Elements ( 3.02 % REE)

Loranskite-(Y) Classification

Dana Class:

8.1.5.1 (8)Multiple Oxides with Nb, Ta, and Ti

(8.1)where A BO4

(8.1.5)Dana Group

8.1.5.1 Loranskite-(Y) (Y,Ce,Ca)ZrTaO6(?) Unk Ortho

Strunz Class:

IV/D.19-100 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.19 - Polycrase-(Y) - Loranskite-(Y) series

IV/D.19-10 Polycrase-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 Pcan 2/m 2/m 2/m

IV/D.19-15 Uranopolycrase (U,Y)(Ti,Nb,Ta)2O6 P bcn 2/m 2/m 2/m

IV/D.19-20 Yttrocrasite-(Y) (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 Unk Ortho

IV/D.19-30 Fersmite (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6 Pcan 2/m 2/m 2/m

IV/D.19-40 Euxenite-(Y) (Y,Ca,Ce)(Nb,Ta,Ti)2O6 Pcan 2/m 2/m 2/m

IV/D.19-60 Samarskite-(Y) (Y,Fe,U)(Nb,Ta)5O4 P bcn 2/m 2/m 2/m

IV/D.19-70 Ishikawaite (U,Fe,Y,Ca)(Nb,Ta)O4(?) Unk Ortho

IV/D.19-80 Yttrocolumbite-(Y) (Y,U,Fe)(Nb,Ta)O4 Unk Ortho

IV/D.19-90 Yttrotantalite-(Y) (Y,U,Fe)(Ta,Nb)O4 I2/a 2/m

IV/D.19-100 Loranskite-(Y) (Y,Ce,Ca)ZrTaO6(?) Unk Ortho

Other Loranskite-(Y) Information

References:

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

See Also:

Links to other databases for Loranskite-(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

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

Loranskite-(Y)

(Y,Ce,Ca)ZrTaO6 (?)
Dana No: 8.1.5.1 Strunz No: IV/D.19-100
Locality:

Notes: