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Röntgenite-(Ce) (Röntgenit-(Ce))

Pictures (2 Images total)

Röntgenit-(Ce)
Views (File:
1130010493
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Röntgenit-(Ce)
Bildbreite:3mm; Fundort:Mont Saint-Hilaire
Copyright: Stephan Wolfsried; Contribution: JHM
Location: Kanada/Québec/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Röntgenite-(Ce)
Image: 1130010493
Rating: 6.5 (votes: 2)
License: Usage for Mineralienatlas project only
Röntgenit-(Ce)

Bildbreite:3mm; Fundort:Mont Saint-Hilaire
Copyright: Stephan Wolfsried
Contribution: JHM 2005-10-22
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec / Kanada
Roentgenit-(Ce) (rot), Huanghoit-(Ce) (orange), Aegirin (grün)
Views (File:
1244993392
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Roentgenit-(Ce) (rot), Huanghoit-(Ce) (orange), Aegirin (grün)
Bildbreite: 6 mm; Fundort: Ost-Bruch, Bayan-Obo-Lagerstätte, Vereinigtes Darhan-Mumingan-Banner, Baotou, Innere Mongolei, China
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: China/Innere Mongolei (Neimenggu)/Baotou/Vereinigtes Darhan-Mumingan-Banner/Bayan Obo/Bayan Obo SE-Fe-Nb-Lagerstätte/Ost-Bruch (East Mine)
Mineral: Huanghoite-(Ce), Röntgenite-(Ce)
Image: 1244993392
Rating: 5 (votes: 3)
License: Usage for Mineralienatlas project only
Roentgenit-(Ce) (rot), Huanghoit-(Ce) (orange), Aegirin (grün)

Bildbreite: 6 mm; Fundort: Ost-Bruch, Bayan-Obo-Lagerstätte, Vereinigtes Darhan-Mumingan-Banner, Baotou, Innere Mongolei, China
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-14
Locality: Ost-Bruch (East Mine) / Bayan Obo SE-Fe-Nb-Lagerstätte / Bayan Obo / Vereinigtes Darhan-Mumingan-Banner / Baotou / Innere Mongolei (Neimenggu) / China

Collectors Summary

Color gelblichbraun
Streak color weiß
Hardness (Mohs) 4.5
Solubility +++ Säuren
Crystal System trigonal, R3

Chemism

Chemical formula

Ca2(Ce,La)3(CO3)5F3

Chemical composition

Calcium, Cerium, Lanthanum, Fluor, Kohlenstoff, Sauerstoff

Unit weight: 856.63772475 u; Number of atoms in the formula: 28

Info

Empirical formula:

Ca2(Ce0.75La0.25)3(CO3)5F3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Carbon

C

7.01

5

17.86

12.0107800

60.0539000
Oxygen

O

28.02

15

53.57

15.9994300

239.9914500
Fluorine

F

6.65

3

10.71

18.9984033

56.9952098
Calcium

Ca

9.36

2

7.14

40.0784000

80.1568000
Lanthanum

La

12.16

0.75

2.68

138.9055200

104.1791400
Cerium

Ce

36.80

2.25

8.04

140.1161000

315.2612250

Analysis wt%

CaO : 13.08, Ce2O3 : 57.41, F : 6.65, CO2 : 25.66, Ln2O3 : 57.41 (Ref: berechnet)

Strunz 9th edition incl. updates

5.BD.30

5: Carbonate (Carbonate, Nitrate)
B: Carbonate mit weitere Anionen, ohne H2O
D: Mit Selten-Erden-Elementen (REE)
30:Parisit-Röntgenit-Gruppe

Lapis Classification

V/C.07-090

V: NITRATE, CARBONATE UND BORATE
C: Wasserfreie Carbonate, mit fremden Anionen
7: Bastnäsit-Gruppe

Classification by Hölzel

5.BD.330

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
B: Carbonates (+Anions -Water)
D: Carbonates with Rare Earth Elements
3: F/CO3 >0.5 <1 Parisite-Group

Dana 8th edition

16a.01.06.01

16a: Carbonates - Hydroxyl or Halogen
01: Carbonates - Hydroxyl or Halogen in the Bastnasite/Shynchysite/Parasite Groups

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelblichbraun

Streak color

weiß

max. Birefringence

0.094
Birefringence chart\! Röntgenite-(Ce) title=Birefringence chart Röntgenite-(Ce)

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

1.662

RI value γ / ε

1.756

Ri mean

1.693

2V angle

Uniaxial (+)

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

146

Space Group

R3

Cell parameters a (Å)

7.131

Cell parameters b (Å)

-

Cell parameters c (Å)

69.41

Cell parameters a/b or c/a

9.734

Cell parameters c/b

-

Z

9

Volume (ų)

3056.705

X-Ray Powder Diffraction

23.13(100),
11.57(70),
4.627(40),
3.565(50),
2.824(50),
2.058(10),
1.941(20),
1.881(20)
XRD chart Röntgenite-(Ce)

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)

4.5

VHN (Hardness Vickers)

280 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.19 (berechnet)

4.188 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Grönland/Qaasuitsup Kommunia/Narsaarsuk (Narssârssuk)/Narssârssuk-Pegmatit

Preface

Author (Name, Year)

Donnay & Donnay, 1953

Danger of confusion

Zur Unterscheidung von Parisit–(Ce) und Röntgenit–(Ce) wird vorgeschlagen, im Ramanspektrum das Verhältnis der Banden bei 1092 cm−1 / 1081 cm−1 heranzuziehen. Siehe Manuela Zeug, Lutz Nasdala, Martin Ende, Gerlinde Habler, Christoph Hauzenberger, Chutimun Chanmuang N., Radek Škoda, Dan Topa, Manfred Wildner, Richard Wirth: The parisite–(Ce) enigma: challenges in the identification of fluorcarbonate minerals. Mineralogy and Petrology Vol. 115, Nr. 1 (2021) S. 1–19.

References

American Mineralogist 38 (1953), 868

Other languages

German

Röntgenit-(Ce)

Spanish

Röntgenita-(Ce)

English

Röntgenite-(Ce)

French

Röntgenite-(Ce)

CNMNC symbol

Symbol

Rng-Ce

Locations with GPS information

IDs

GUSID (Global unique identifier short form) fe5Ij8IugkOuc5USW9HBxA
GUID (Global unique identifier) 8F48EE7D-2EC2-4382-AE73-95125BD1C1C4
Database ID 3194