Xenotime-(Y) Mineral Data

Xenotime-(Y) Mineral Data
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General Xenotime-(Y) Information

Help on Chemical Formula: Chemical Formula: YPO4
Help on Composition: Composition: Molecular Weight = 183.88 gm
   Yttrium     48.35 %  Y    61.40 % Y2O3
   Phosphorus  16.84 %  P    38.60 % P2O5
   Oxygen      34.80 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y(PO4)
Help on Environment: Environment: Minor accessory mineral in both acidic and alkalic igneous rocks and their pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: Hidra (Hitterø), Flekkefjord, Vest-Agder, Norway Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek xenos - "foreign" and time - "honor."
Help on Name Pronunciation: Name Pronunciation: Xenotime-(Y) Say XENOTIME-(Y)
Help on Synonym: Synonym: ICSD 79754
  PDF 11-254
 

Xenotime-(Y) Image

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Xenotime-(Y)

Comments: Dark brown colored Xenotime-(Y) crystal.
Location: Hurricane Mountain, Conway, Carroll County, New Hampshire, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Xenotime-(Y) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.87518
Help on Cell Dimensions: Cell Dimensions: a = 6.89, c = 6.03, Z = 4; V = 286.26 Den(Calc)= 4.27
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-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): 3.45(1), 1.768(0.5), 2.56(0.5),
Help on Forms: Forms:

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Forms: ( 1 0 0) ( 1 0 1)

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Click Here for Large Xenotime-(Y) Structure Window Crystal Structure:

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Ni Y , Hughes J M , Mariano A N , American Mineralogist , 80 (1995) p.21-26, Crystal chemistry of the monazite and xenotime structures

 

Physical Properties of Xenotime-(Y)

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Yellowish brown, Greenish brown, Gray, Reddish brown, Brown.
Help on Density: Density: 4.4 - 5.1, Average = 4.75
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Xenotime-(Y)

Help on Dichroism (e): Dichroism (e): pink, yellow, or yellow brown.
Help on Dichroism (w): Dichroism (w): brownish yellow, grayish brown, or greenish.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.076 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.18,KPDmeas= 0.1618,KC= 0.175
Ncalc = 1.75 - 1.89
Help on Optical Data: Optical Data: Uniaxial (+), w=1.721, e=1.816, bire=0.0950.
 

Calculated Properties of Xenotime-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Xenotime-(Y) =4.27 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001670617
Boson Index = 0.9998329383
Help on Photoelectric: Photoelectric: PEXenotime-(Y) = 61.49 barns/electron
U=PEXenotime-(Y) x rElectron Density= 245.62 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Xenotime-(Y) is Not Radioactive
 

Xenotime-(Y) Classification
Help on Dana Class: Dana Class: 38.04.11.01 (38)Anhydrous Phosphates, etc
  (38.04)A+ XO4
  (38.04.11)Zenotime Group (Tetragonal: I41/amd)
 
38.04.11.01 Xenotime-(Y) YPO4 I 41/amd 4/m 2/m 2/m
 
38.04.11.02 Chernovite-(Y) YAsO4 I 41/amd 4/m 2/m 2/m
 
38.04.11.03 Wakefieldite-(Y) YVO4 I 41/amd 4/m 2/m 2/m
 
38.04.11.04 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 41/amd 4/m 2/m 2/m
 
38.04.11.05 Pretulite! ScPO4 I 41/amd 4/m 2/m 2/m
 
38.04.11.06 Xenotime-(Yb)! YbPO4 I 41/amd 4/m 2/m 2/m
 
38.04.11.07 Wakefieldite-(La)! LaVO4 I 41/amd 4mm
 
38.04.11.08 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 Xenotime-(Y) Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Xenotime-(Y) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Xenotime-(Y)

YPO4
Dana No: 38.04.11.01 Strunz No: 08.AD.35
Locality:

 

Notes: