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Rémondite-(La)

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Formula:
Na3(La,Ce)3(CO3)5
System:
Monoclinic
Colour:
Bright yellow orange
Hardness:
3
Name:
For its relation to Rémondite-(Ce), and the predominance of La over other rare-earth elements in the composition.
This page provides mineralogical data about Rémondite-(La).

Classification of Rémondite-(La)

Approved 1999
5.AD.15

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
D : With rare-earth elements (REE)
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Type Occurrence of Rémondite-(La)

General Appearance of Type Material:
microporous aggregates up to 2 mm in size
Geological Setting of Type Material:
in hyperagpaitic pegmatites

Physical Properties of Rémondite-(La)

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Bright yellow orange
Streak:
White
Hardness (Mohs):
3
Hardness Data:
Measured
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
3.5 g/cm3 (Measured)    3.57 g/cm3 (Calculated)

Crystallography of Rémondite-(La)

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P21
Cell Parameters:
a = 10.49Å, b = 6.417Å, c = 10.5Å
β = 119.8°
Ratio:
a:b:c = 1.635 : 1 : 1.636
Unit Cell Volume:
V 613 ų
Z:
2

Optical Data of Rémondite-(La)

Type:
Biaxial (-)
RI values:
nα = 1.615 nβ = 1.619 nγ = 1.622
2V:
Measured: 80°
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v
Pleochroism:
Non-pleochroic

Chemical Properties of Rémondite-(La)

Formula:
Na3(La,Ce)3(CO3)5
Essential elements:
All elements listed in formula:

Relationship of Rémondite-(La) to other Species

5.AD.05Sahamalite-(Ce)(Mg,Fe)(Ce,La,Nd)2(CO3)4
5.AD.15Petersenite-(Ce)Na4(Ce,La,Nd)2(CO3)5
5.AD.15Rémondite-(Ce)Na3(Ce,La,Ca,Na,Sr)3(CO3)5
5.AD.20Paratooite-(La)(REE,Ca,Na,Sr)12Cu2(CO3)16

Other Names for Rémondite-(La)

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 Rémondite-(La)

Reference List:
Pekov, I.V., N.V. Chukanov, N.N. Kononkova, A.E. Zadov & Yu.V. Belovitskaya (2000), Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 129(1): 53-60.

Internet Links for Rémondite-(La)

Localities for Rémondite-(La)

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
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
ZVMO 129(1):53-60(2000)
Russia (TL)
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
          • Koashva Mt
I.V. Pekov, N.V. Chukanov, N.N. Kononkova, A.E. Zadov & Yu.V. Belovitskaya (2000) Zap. Vser. Min. Ob. 129 (1), 53-60
Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
Mineral and/or Locality  
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