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Clinofergusonite-(Nd) (Fergusonite-beta-(Nd))

Collectors Summary

Color bräunlich rot, rot, gelbbraun, orange
Streak color blass braun
Hardness (Mohs) 5.75
Crystal System monoklin,

Chemism

Chemical formula

(Nd,Ce)NbO4

Chemical composition

Cerium, Neodymium, Niob, Sauerstoff

Unit weight: 300.115377 u; Number of atoms in the formula: 6

Info

Empirical formula:

(Nd0.75Ce0.25)NbO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

21.32

4

66.67

15.9994300

63.9977200

Niobium

Nb

30.96

1

16.67

92.9063820

92.9063820

Cerium

Ce

11.67

0.25

4.17

140.1161000

35.0290250

Neodymium

Nd

36.05

0.75

12.50

144.2430000

108.1822500

Analysis wt%

La2O3 : 2.05, Ce2O3 : 14.62, Pr2O3 : 4.28, Nd2O3 : 21.25, Sm2O3 : 4.53, Gd2O3 : 1.37, Tb2O3 : 0.71, Dy2O3 : 0.98, Ho2O3 : 0.56, Er2O3 : 0.51, Yb2O3 : 0.45, Y2O3 : 2.83, Nb2O5 : 41.00, ThO2 : 1.09, UO2 : 1.46, Ln2O3 : 55.00 (Ref: Sci.Geol.Sin.83)

Strunz 9th edition incl. updates

4.DG.10

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
G: Mit großen (± mittelgroßen) [Kationen]; Ketten kantenverknüpfter Oktaeder
10:ß-Fergusonit-Gruppe

Lapis Classification

IV/D.24-030

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

Classification by Hölzel

4.DJ.420

4: OXIDES
D: Dioxides
J: Titanates, Niobates and Tantalates, C large, V medium ò 2
4: Fergusonite-Group

Mineral status

anerkanntes Mineral

Optical Properties

Color

bräunlich rot, rot, gelbbraun, orange

Streak color

blass braun

Diaphaneity (Transparency)

durchscheinend bis opak

RI value α / ω / n

2.0

RI value β

metam.

Ri mean

2.0

2V angle

i metam.

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

5.149s

Cell parameters b (Å)

11.29s

Cell parameters c (Å)

5.475s

Cell parameters a/b or c/a

0.456

Cell parameters c/b

0.485

Cell parameters α

90°

Cell parameters β

94.58

Cell parameters γ

90°

Z

4

Volume (ų)

317.258

Physical Properties

Hardness (Mohs)

5.75

VHN (Hardness Vickers)

630 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

6.45

6.283 ( ρ calc. Mineralienatlas )

Tenacity

spröde

References

Sun, Weijun; Ma, Fengjun; and Zhuang, Shijie - Fergusonite-β-Nd. Scientia Geologica Sinica, 1983(1), 78-81. (Chinesisch mit Englishem Abstrakt)

Dunn, P.J., Cabri, L.J., Chao, G.Y., Fleischer, M., Francis, C.A., Grice, J.D., Jambor, J.L., Pabst, A. - New mineral names. American Mineralogist, 69 (1984), 406-412.

Frédéric Hatert; Stuart J. Mills; Marco Pasero; Ritsuro Miyawaki; Ferdinando Bosi: CNMNC guidelines for the nomenclature of polymorphs and polysomes. Mineralogical Magazine Vol. 87, Nr. 2 (2023) S. 225-232. Umbenennung in Klinofergusonit-(Nd)

Other languages

English

Clinofergusonite-(Nd)

renamed; CNMNC Newsletter 69; Mineralogical Magazine, 86

Spanish

Fergusonita-beta-(Nd)

German

Klinofergusonit-(Nd)

umbenannt; CNMNC Newsletter 69; Mineralogical Magazine, 86

old name

German

Fergusonit-(Nd)-β

renamed; CNMNC Newsletter 69; Mineralogical Magazine, 86

English

Fergusonite-(Nd)-β

umbenannt; CNMNC Newsletter 69; Mineralogical Magazine, 86

French

Fergusonite-Beta-(Nd)

English

Fergusonite-beta-(Nd)

Alternative Name

English

Beta-Fergusonite-(Nd)

German

Fergusonit-(Nd)-beta

German

Fergusonit-beta-(Nd)

English

Fergusonite-(Nd)-beta

CNMNC symbol

Symbol

Fgs-Nd-β

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 3RFDux-wTUO1GJD8yUW14Q
GUID (Global unique identifier) BB4311DD-B01F-434D-B518-90FCC945B5E1
Database ID 1122