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About Lecoqite-(Y)Hide

Paul-Émile Lecoq de Boisbaudran
Na3Y(CO3)3 · 6H2O
Colourless, white
Specific Gravity:
2.358 (Calculated)
Crystal System:
Named for P.E. Lecoq de Boisbaudran (1838-1912), French chemist and specialist in the spectroscopic analysis of minerals and synthetic compounds. He discovered the chemical elements gallium, samarium and dysprosium.
Known as a synthetic compound.

Classification of Lecoqite-(Y)Hide

Approval Year:

Physical Properties of Lecoqite-(Y)Hide

Colourless, white
2.358 g/cm3 (Calculated)

Optical Data of Lecoqite-(Y)Hide

Uniaxial (+)
RI values:
nα =
Warning: number_format() expects parameter 1 to be float, string given in /home/mindat/www/show_class.php on line 4009
nω = 1.521() nε = 1.497 - 3.000
Max Birefringence:
δ = 0.024
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Lecoqite-(Y)Hide

Na3Y(CO3)3 · 6H2O

Crystallography of Lecoqite-(Y)Hide

Crystal System:
Class (H-M):
6 - Pyramidal
Space Group:
Cell Parameters:
a = 11.316(4) Å, c = 5.931(2) Å
a:c = 1 : 0.524
Unit Cell V:
657.7 ų

X-Ray Powder DiffractionHide

Powder Diffraction Data:
9.82 (57)
5.081 (100)
2.627 (39)
2.471 (37)

Type Occurrence of Lecoqite-(Y)Hide

Synonyms of Lecoqite-(Y)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Siderite1 photo of Lecoqite-(Y) associated with Siderite on

Other InformationHide

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 Lecoqite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
PEKOV, I.V., CHUKANOV, N.V., ZUBKOVA, N.V., KSENOFONTOV, D.A., HORVÁTH, L., ZADOV, A.E.and PUSHCHAROVSKY, D.Yu. (2010) Lecoqite-(Y), Na3Y(CO3)3•6H2O, a new mineral species from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist, 48, 95-104.
Amor Ben Ali, Mohamed Osman Awaleh, Marc Leblanc, Leila Samia Smiri, Vincent Maisonneuve and Sylvie Houlbert (2004): Hydrothermal synthesis, crystal structure, thermal behaviour, IR and Raman spectroscopy of Na3Y(CO3)3.6H2O. Comptes Rendus Chimie 7, 661-668.

Internet Links for Lecoqite-(Y)Hide

Localities for Lecoqite-(Y)Hide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada (TL)
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
PEKOV, I.V., CHUKANOV, N.V., ZUBKOVA, N.V., KSENOFONTOV, D.A., HORVÁTH, L., ZADOV, A.E.and PUSHCHAROVSKY, D.Yu. (2010) Lecoqite-(Y), Na3Y(CO3)3•6H2O, a new mineral species from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist, 48, 95-104.
  • Catalonia
    • Lleida (Lérida)
      • El Pallars Jussà
        • La Vall Fosca
          • La Torre de Cabdella (La Torre de Capdella)
            • Castell-estaó
Desor, J (2018). New minerals from the Eureka mine.
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