Xenotime-(Y) Mineral Data

Advertisment

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals

Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.

General Xenotime-(Y) Information

Chemical Formula:

YPO4

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

Empirical Formula:

Y(PO₄)

Environment:

Minor accessory mineral in both acidic and alkalic igneous rocks and their pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1832

Locality:

Hidra (Hitterø), Flekkefjord, Vest-Agder, Norway Link to MinDat.org Location Data.

Name Origin:

From the Greek xenos - "foreign" and time - "honor."

Name Pronunciation:

Xenotime-(Y)

Synonym:

ICSD 79754

PDF 11-254

Xenotime-(Y) Image

Images:

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

Axial Ratios:

a:c = 1:0.87518

Cell Dimensions:

a = 6.89, c = 6.03, Z = 4; V = 286.26 Den(Calc)= 4.27

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/I_o): 3.45(1), 1.768(0.5), 2.56(0.5),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

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

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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)

Cleavage:

{100} Perfect

Color:

Yellowish brown, Greenish brown, Gray, Reddish brown, Brown.

Density:

4.4 - 5.1, Average = 4.75

Diaphaneity:

Opaque

Fracture:

Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

4-5 - Fluorite-Apatite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Xenotime-(Y)

Dichroism (e):

pink, yellow, or yellow brown.

Dichroism (w):

brownish yellow, grayish brown, or greenish.

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

Optical Data:

Uniaxial (+), w=1.721, e=1.816, bire=0.0950.

Calculated Properties of Xenotime-(Y)

Electron Density:

Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Xenotime-(Y) =4.27 gm/cc.

Fermion Index:

Fermion Index = 0.0001670617
Boson Index = 0.9998329383

Photoelectric:

PE_Xenotime-(Y)= 61.49 barns/electron
U=PE_Xenotime-(Y) x rElectron Density= 245.62 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Xenotime-(Y) is Not Radioactive

Xenotime-(Y) Classification

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

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

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

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

Search for Xenotime-(Y) using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Xenotime-(Y) :

A Bijoux Google Search for Xenotime-(Y)
Adam's Minerals Google Search for Xenotime-(Y)
Cape Minerals Google Search for Xenotime-(Y)
Dakota Matrix Minerals Google Search for Xenotime-(Y)
Excalibur Mineral Corp. Google Search for Xenotime-(Y)
Exceptional Minerals Google Search for Xenotime-(Y)
John Betts Fine Minerals Search for Xenotime-(Y)
McDougall Minerals Google Search for Xenotime-(Y)
Mineral News Website Link
Rock and Mineral Shows Google Search for Xenotime-(Y)
Weinrich Minerals, Inc. Google Search for Xenotime-(Y)

Ask about Xenotime-(Y) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Xenotime-(Y)

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

Notes: