Mineralogy Database

Chernovite-(Y) Mineral Data

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General Chernovite-(Y) Information

Help on Chemical  Formula: Chemical Formula: YAsO4
Help on Composition: Composition: Molecular Weight = 228.43 gm
   Lanthanum    6.08 %  La    7.13 % La2O3
   Yttrium     35.03 %  Y    44.48 % Y2O3
   Arsenic     29.52 %  As   45.28 % As2O5
   Phosphorus   1.36 %  P     3.11 % P2O5
   Oxygen      28.02 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.9La0.1(AsO4)0.9(PO4)0.1
Help on Environment: Environment: In piemontite veinlets in liparite porphyry (Nyarta-Syu-Yu River, Russia); in Alpine-type fissures (Binntal, Switzerland)
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Near the head of the Nyarta-Syu-Yu River, east of Mt. Tel�posiz, Polar Ural Mountains, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Professor Aleksandr Aleksandrovich Chernov (1877-1963), Russian geologist, Institute of Geology, Syktyvar, Russia, explorer of the Polar Urals
Help on Synonym: Synonym: ICSD 24513
  PDF 13-429

Chernovite-(Y) Image

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Comments: Dark brown irregular masses and veinlets of chernovite-(Y) in pale creamy tan-colored matrix.
Location: Montaldo Mine, Piedmont, Italy. Scale: 2 1/4" x 2".
© Chris Wright / Wrights Rock Shop

Chernovite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.89139
Help on Cell Dimensions: Cell Dimensions: a = 7.09, c = 6.32, Z = 4; V = 317.69 Den(Calc)= 4.78
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.811(1), 2.644(1), 3.519(1),

Physical Properties of Chernovite-(Y)

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Brown, Colorless, Light yellow.
Help on Density: Density: 4.866
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Pseudo Octohedral - Crystals show an octohedral outline.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Chernovite-(Y)

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): pale rose-yellow.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1738,KPDmeas= 0.1708,KC= 0.1652
Ncalc = 1.79 - 1.8
Help on Optical Data: Optical Data: Uniaxial (+), w=1.783, e=1.879, bire=0.0960.

Calculated Properties of Chernovite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.43 gm/cc
note: Specific Gravity of Chernovite-(Y) =4.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001892059
Boson Index = 0.9998107941
Help on Photoelectric: Photoelectric: PEChernovite-(Y) = 94.90 barns/electron
U=PEChernovite-(Y) x relectron= 420.47 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 5,906.17 (Gamma Ray American Petroleum Institute Units)
Concentration of Chernovite-(Y) per GRapi unit = 169.31 (PPM)

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

Estimated Radioactivity from Chernovite-(Y) - mild
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 7.32 cm 136,212 3.68E-06 5,906.17 1.94
100 gm / 3.40 cm 13,621 3.68E-07 590.62 0.19
10 gm / 1.58 cm 1,362 3.68E-08 59.06 0.02
1 gm / 7.32 mm 136 3.68E-09 5.91 0.00
0.1 gm / 3.40 mm 14 3.68E-10 0.59 0.00
0.01 gm / 1.58 mm 1 3.68E-11 0.06 0.00
0.001 gm / 0.73 mm 0 3.68E-12 0.01 0.00

Weight of pure Chernovite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.87 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 ( 6.08 % REE)

Chernovite-(Y) Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.04)A+ XO4
  (38.04.11)Zenotime Group (Tetragonal: I41/amd) Xenotime-(Y) YPO4 I 41/amd 4/m 2/m 2/m Chernovite-(Y) YAsO4 I 41/amd 4/m 2/m 2/m Wakefieldite-(Y) YVO4 I 41/amd 4/m 2/m 2/m Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 41/amd 4/m 2/m 2/m Pretulite! ScPO4 I 41/amd 4/m 2/m 2/m Xenotime-(Yb)! YbPO4 I 41/amd 4/m 2/m 2/m Wakefieldite-(La)! LaVO4 I 41/amd 4mm Wakefieldite-(Nd)! NdVO4 I 41/amd 4mm
Help on  Strunz Class: Strunz Class: 08.AD.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AD -With only large cations
08.AD.35 Dreyerite BiVO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Chernovite-(Y) YAsO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Pretulite! ScPO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Xenotime-(Y) YPO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Wakefieldite-(Y) YVO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Xenotime-(Yb)! YbPO4 I 41/amd 4/m 2/m 2/m
08.AD.35 Wakefieldite-(La)! LaVO4 I 41/amd 4mm
08.AD.35 Wakefieldite-(Nd)! NdVO4 I 41/amd 4mm

Other Chernovite-(Y) Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Chernovite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 08.AD.35





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