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Wakefieldite-(Y) (Wakefieldit-(Y))


You find additional specimen at the Geolitho Museum

Collectors Summary

Color gelb, hellbraun, hellgelbbraun
Streak color weiß
Hardness (Mohs) 5
Crystal System tetragonal, I41/amd

Chemism

Chemical formula

YVO4

Chemical composition

Yttrium, Sauerstoff, Vanadium

Unit weight: 203.845082 u; Number of atoms in the formula: 6

Info

Empirical formula:

YVO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

31.40

4

66.67

15.9994300

63.9977200

Vanadium

V

24.99

1

16.67

50.9415100

50.9415100

Yttrium

Y

43.61

1

16.67

88.9058520

88.9058520

Analysis wt%

Y2O3 : 55.39, V2O5 : 44.61, Ln2O3 : 55.39 (Ref: berechnet)

Strunz 9th edition incl. updates

8.AD.35

8: Phosphate, Arsenate, Vanadate
A: Phosphate, etc., ohne weitere Anionen, ohne H2O
D: Mit ausschließlich großen [Kationen]
35:Xenotim-Gruppe

Lapis Classification

VII/A.14-030

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
A: Wasserfreie Phosphate [PO4] 3-, ohne fremde Anionen
14: Sehr große Kationen: Ca-Na-K, SE, Bi u.a.; Xenotim-Gruppe

Classification by Hölzel

8.AE.300

8: PHOSPHATES ARSENATES VANADATES
A: Phosphates (-anions -water)
E: Xenotime-Group

Dana 8th edition

38.04.11.03

38: Anhydrous Phosphates, etc
04: Anhydrous Phosphates, etc A+ XO4
11: Zenotime Group (Tetragonal: I41/amd)

IMA status

Mit Anerkennung der CNMNC umbenannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Xenotime group

Optical Properties

Color

gelb, hellbraun, hellgelbbraun

Streak color

weiß

max. Birefringence

0.14

Birefringence chart\! Wakefieldite-(Y) title=Birefringence chart Wakefieldite-(Y)

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

2.00

RI value γ / ε

2.14

Ri mean

2.047

2V angle

Uniaxial (+)

Crystallography

Crystal System

tetragonal

Class (H-M)

4/mmm

Space Group number

141

Space Group

I41/amd

Cell parameters a (Å)

7.105

Cell parameters b (Å)

-

Cell parameters c (Å)

6.29

Cell parameters a/b or c/a

0.885

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

317.526

Crystal structure

aufgeklärt, zirkonartige Struktur, siehe Marcella Cadoni, Marco E. Ciriotti, Giovanni Ferraris: Wakefieldite-(Y) from Montaldo di Mondovì (Italy): new data and crystal structure. Rendiconti Lincei Vol. 22, Nr. 4 (2011) S.307-314.

X-Ray Powder Diffraction

4.74(20),
3.56(100),
2.66(60),
2.51(30),
2.21(20),
1.824(70),
1.774(20),
1.585(10)

XRD chart Wakefieldite-(Y)

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.21

4.264 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Hogarth & Miles, 1969

References

American Mineralogist 56 (1971), 395

IMA group assignments


 
 
YAsO4
tetragonal
I41/amd

 
 
Sc[PO4]
tetragonal
I41/amd

 
 
CeVO4
tetragonal
I41/amd

 
 
LaVO4
tetragonal
I41/amd

 
 
NdVO4
tetragonal
I41/amd

 
 
YVO4
tetragonal
I41/amd

 
 
Gd(PO4)
tetragonal
I41/amd

 
 
(Yb,Y,Er)[PO4]
tetragonal
I41/amd

 
 
YPO4
tetragonal
I41/amd

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Actuality: 17. Jun 2024 - 22:46:15

Other languages

German

Wakefieldit-(Y)

Spanish

Wakefieldita-(Y)

French

Wakefieldite-(Y)

English

Wakefieldite-(Y)

Russian

Уэкфилдит-(Y)

CNMNC (IMA)-Number

IMA 1969-012

CNMNC symbol

Symbol

Wf-Y

Locations with GPS information

IDs

GUSID (Global unique identifier short form) weZWZc8HVEeVh3q_xDSnnw
GUID (Global unique identifier) 6556E6C1-07CF-4754-9587-7ABFC434A79F
Database ID 4112