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Röntgenite-(Ce)

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Wilhelm Conrad Röntgen
Formula:
Ca2(Ce,La)3(CO3)5F3
System:
Trigonal
Colour:
Yellow to brown, green
Hardness:
Name:
For Wilhelm Conrad Röntgen (1845-1923), German physicist, who discovered the X rays (Nobel prize in 1901)
Needs reinvestigation by modern methods.

Cf. parisite-(Ce), synchysite-(Y).

Classification of Röntgenite-(Ce)

Approved 1987
5.BD.20d

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
D : With rare earth elements (REE)
16a.1.6.1

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)(XO3)Zq
12.1.16

12 : Carbonates with other anions
1 : Carbonates with halides
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http://www.mindat.org/min-3429.html
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Type Occurrence of Röntgenite-(Ce)

Occurrences of Röntgenite-(Ce)

Geological Setting:
Pegmatites

Physical Properties of Röntgenite-(Ce)

Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Yellow to brown, green
Hardness (Mohs):
Fracture:
Sub-Conchoidal
Density:
4.19 g/cm3 (Calculated)

Crystallography of Röntgenite-(Ce)

Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
R3
Cell Parameters:
a = 7.13(3) Å, c = 69.4(2) Å
Ratio:
a:c = 1 : 9.734
Unit Cell Volume:
V 3,055.41 ų (Calculated from Unit Cell)
Z:
9
Morphology:
Hexagonal
Twinning:
On (0001), rare
X-Ray Powder Diffraction Data:
d-spacingIntensity
23.13 (100)
11.57 (70)
7.71 (13)
4.627 (44)
3.565 (49)
2.824 (48)
2.058 (15)
1.941 (16)
1.881 (18)
(
Comments:
ICDD-PDF 35-579

Optical Data of Röntgenite-(Ce)

Type:
Uniaxial (+)
RI values:
nω = 1.658 - 1.662 nε = 1.756
Max Birefringence:
δ = 0.098
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of Röntgenite-(Ce)

Formula:
Ca2(Ce,La)3(CO3)5F3
Essential elements:
All elements listed in formula:

Relationship of Röntgenite-(Ce) to other Species

5.BD.05Cordylite-(Ce)NaBaCe2(CO3)4F
5.BD.05Lukechangite-(Ce)Na3Ce2(CO3)4F
5.BD.10Zhonghuacerite-(Ce)Ba2Ce(CO3)3F
5.BD.10Kukharenkoite-(Ce)Ba2Ce(CO3)3F
5.BD.10Kukharenkoite-(La)Ba2(La,Ce,Th)(CO3)3F
5.BD.15Cebaite-(Ce)Ba3Ce2(CO3)5F2
5.BD.15Cebaite-(Nd)Ba3(Nd,Ce)2(CO3)5F2
5.BD.18Arisite-(Ce)NaCe2(CO3)3-xF2x+1
5.BD.18Arisite-(La)NaLa2(CO3)3-xF2x+1
5.BD.20aBastnäsite-(Ce)(Ce,La)(CO3)F
5.BD.20aBastnäsite-(La)(La,Ce)(CO3)F
5.BD.20aBastnäsite-(Y)(Y,Ce)(CO3)F
5.BD.20aHydroxylbastnäsite-(Ce)(Ce,La)(CO3)(OH,F)
5.BD.20aHydroxylbastnäsite-(Nd)(Nd,Ce,La)(CO3)(OH,F)
5.BD.20aHydroxylbastnäsite-(La)(La,Nd,Ce)(CO3)(OH,F)
5.BD.20bParisite-(Ce)Ca(Ce,La)2(CO3)3F2
5.BD.20bParisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2
5.BD.20cSynchysite-(Ce)Ca(Ce,La)(CO3)2F
5.BD.20cSynchysite-(Nd)Ca(Nd,Y,Gd)(CO3)2F
5.BD.20cSynchysite-(Y)Ca(Y,Ce)(CO3)2F
5.BD.20aThorbastnäsiteTh(Ca,Ce)(CO3)2F2 · 3H2O
5.BD.20aBastnäsite-(Nd)Nd(CO3)F
5.BD.25Horváthite-(Y)NaY(CO3)F2
5.BD.25Qaqarssukite-(Ce)Ba(Ce,REE)(CO3)2F
5.BD.35Huanghoite-(Ce)BaCe(CO3)2F
12.1.1NorthupiteNa3Mg(CO3)2Cl
12.1.2BarentsiteNa7Al(HCO3)2(CO3)2F4
12.1.3RouvilleiteNa3(Ca,Mn,Fe)2(CO3)3F
12.1.4ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2O
12.1.5DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x<0.5)
12.1.6BrenkiteCa2(CO3)F2
12.1.7Stenonite(Sr,Ba,Na)2Al(CO3)F5
12.1.8Bastnäsite-(Ce)(Ce,La)(CO3)F
12.1.9Bastnäsite-(La)(La,Ce)(CO3)F
12.1.10Bastnäsite-(Y)(Y,Ce)(CO3)F
12.1.11Parisite-(Ce)Ca(Ce,La)2(CO3)3F2
12.1.12Parisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2
12.1.13Synchysite-(Ce)Ca(Ce,La)(CO3)2F
12.1.14Synchysite-(Y)Ca(Y,Ce)(CO3)2F
12.1.15Synchysite-(Nd)Ca(Nd,Y,Gd)(CO3)2F
12.1.17Cordylite-(Ce)NaBaCe2(CO3)4F
12.1.19Huanghoite-(Ce)BaCe(CO3)2F
12.1.20Zhonghuacerite-(Ce)Ba2Ce(CO3)3F
12.1.21Cebaite-(Ce)Ba3Ce2(CO3)5F2
12.1.22ThorbastnäsiteTh(Ca,Ce)(CO3)2F2 · 3H2O
12.1.23PhosgenitePb2CO3Cl2
12.1.24BarstowitePb4Cl6(CO3) · H2O
12.1.25AlbrechtschraufiteCa4Mg(UO2)2(CO3)6F2 · 17-18H2O
12.1.26KettneriteCaBiCO3OF

Other Names for Röntgenite-(Ce)

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Röntgenite-(Ce)

Reference List:
American Mineralogist (1953): 38: 392, 868-870, 932-963.

Yunxiang, Ni, John M. Hughes, and Anthony N. Mariano (1993) The atomic arrangement of bastnäsite-(Ce), Ce(CO3)F, and structural elements of synchysite-(Ce), röntgenite-(Ce), and parisite-(Ce). American Mineralogist: 78: 415-418.

Internet Links for Röntgenite-(Ce)

Localities for Röntgenite-(Ce)

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada
 
  • Ontario
    • Thunder Bay District
McLaughlin (1990)
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
HORVÁTH, L. and HORVÁTH-PFENNINGER, E. (2000) Die Mineralien des Mont Saint-Hilaire. Lapis, 25, Nr. 7/8, 23-61 (in German).; HORVÁTH, L., PFENNINGER‑HORVÁTH, E. (2000) I minerali di Mont-Saint-Hilaire (Québec, Canada) Rivista Mineralogica Italiana, XXIV, 140-202 (in Italian with English summary).
China
 
  • Inner Mongolia Autonomous Region
    • Baotou League (Baotou Prefecture)
      • Bayan Obo Mining District
        • Bayan Obo
          • Bayan Obo deposit (Bayun-Obo deposit; Baiyunebo deposit)
Pavel M. Kartashov data
  • Sichuan Province
    • Liangshan Autonomous Prefecture
      • Mianning Co.
Anthony, J.W. et al.: Handbook of Mineralogy
France
 
  • Auvergne
    • Haute-Loire
      • Langeac
        • Marsanges
PERINET F. (2014) - Minéraux des terres rares de Marsanges (Haute Loire). Le Cahier des Micromonteurs N° 123 pp. 18-22
  • Brittany
    • Finistère
      • Guilligomarc'h
analysed at CNRS Nantes
    • Morbihan
      • Grand-Champ
Pierre le Roc'h collection (analyzed by Yves Lulzac, BRGM Nantes, end May 2009)
Greenland (TL)
 
  • Kujalleq
    • Narsaq
      • Igaliku (Igaliko)
        • Narsaarsuk Plateau
G. Donnay: Amer. Mineral. 38:868-870 (1953)
Mongolia
 
  • Dornogovi Aimag
    • Hövsgöl
Kynický, J. & Samec, P. (2005): Hydrothermally-metasomatic and exsolution-like mineralization of the carbonatites from selected localities at Gobi. Mongolian Geoscientist. sv. 9, č. 27, s. 52-55.
  • Hovd Aimag (Khovd Aimag)
    • Altai Mts
      • Khaldzan Buragtag massif
Pavel M. Kartashov analytical data (2012), specimens selfcollected in 1990
Romania
 
  • Harghita Co.
    • Ditrău (Ditró)
Szakáll, S. & Kristály, F., Eds. (2010): Mineralogy of Székelyland, Eastern Transylvania, Romania. Csík County Nature and Conservation Society, Miercurea-Ciuc, Romania, 321 pp.
Russia
 
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
      • Polar Yakutia
Pavel M. Kartashov analytical data
Slovakia
 
  • Banská Bystrica Region
    • Rimavská Sobota Co.
      • Tisovec
Ondrejka M., Uher P., Pršek J., Ozdín D., 2007: Arsenian monazite-(Ce) and xenotime-(Y), REE arsenates and carbonates from the Tisovec-Rejkovo rhyolite, Western Carpathians, Slovakia: Composition and substitutions in the (REE,Y)XO4 system (X = P, As, Si, Nb, S). Lithos, 95, 116-129.
South Korea
 
  • Chungcheongbukdo (Chungchong-pukto)
    • Chungju (Chung Won Kum; Chung-ju)
      • Joongwon-gun
        • Mt. Eorae
P.M. Kartashov data
USA
 
  • Massachusetts
    • Norfolk Co.
Gleba, 1978. Massachusetts Mineral & Fossil Localities
  • New Hampshire
    • Carroll Co.
      • Conway
        • Redstone
Caruso, Louis; Simmons, Gene (1985). Uranium and microcracks in a 1,000-meter core, Redstone, New Hampshire (Contributions to Mineralogy and Petrology, Volume 90, Issue 1, pp.1-17)
  • Virginia
    • Augusta Co.
      • Parnassus
http://csmres.jmu.edu/geollab/baedke/dept/abs2002.pdf.
Mineral and/or Locality  
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