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Ancylite-(La)

Formula:
Sr(La,Ce)[OH|(CO
 
3
)
 
2
] · H
 
2
O
System:OrthorhombicLustre:Vitreous
Hardness:4 - 4½
Name:From the Greek αυκιλος for 'curved', in allusion to the rounded and distorted crystal shapes, plus the "-(La)" suffix due to lanthanum being the dominant REE in the composition.


The lanthanum analogue of Ancylite-(Ce).

Classification of Ancylite-(La)

IMA status:Approved 1995
Strunz 8th edition ID:5/E.08-28
Nickel-Strunz 10th (pending) edition ID:5.DC.05

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
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Type Occurrence of Ancylite-(La)

Type Locality:Marchenko Peak, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Physical Properties of Ancylite-(La)

Lustre:Vitreous
Hardness (Mohs):4 - 4½

Crystallography of Ancylite-(La)

Crystal System:Orthorhombic

Optical Data of Ancylite-(La)

Type:Biaxial (+)
RI values: nα = 1.640 nβ = 1.668 nγ = 1.731
2V:Measured: 70° , Calculated: 70°
Maximum Birefringence:δ = 0.091

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v moderate

Chemical Properties of Ancylite-(La)

Formula:
Sr(La,Ce)[OH|(CO
 
3
)
 
2
] · H
 
2
O
Essential elements:C, H, La, O, Sr
All elements listed in formula:C, Ce, H, La, O, Sr

Relationship of Ancylite-(La) to other Species

Member of Group:
Ancylite Group:
Related Minerals - Nickel-Strunz Grouping):

- +
5.DC.05Ancylite-(Ce)
SrCe[OH|(CO
 
3
)
 
2
] · H
 
2
O
5.DC.05Calcioancylite-(Ce)
(Ca,Sr)Ce(CO
 
3
)
 
2
OH·H
 
2
O
5.DC.05Calcioancylite-(Nd)
(Nd,Ce)
 
3
Ca(CO
 
3
)
 
4
(OH)
 
3
·H
 
2
O
5.DC.05Gysinite-(Nd)
Pb(Nd,La)[OH|(CO
 
3
)
 
2
] · H
 
2
O
5.DC.05Kozoite-(Nd)
(Nd,La,Sm,Pr)[OH|CO
 
3
]
5.DC.05Kozoite-(La)
(La,Nd)(CO
 
3
)(OH)
5.DC.10Kamphaugite-(Y)
Ca(Y,REE)[OH|(CO
 
3
)
 
2
] · H
 
2
O
5.DC.15Sheldrickite
NaCa
 
3
(CO
 
3
)
 
2
F
 
3
·H
 
2
O
5.DC.20Thomasclarkite-(Y)
(Na,Ce)(Y,REE)[(OH)
 
3
|HCO
 
3
] · 4H
 
2
O
5.DC.25Peterbaylissite
(Hg-Hg)
 
1.5
[OH|CO
 
3
] · 2H
 
2
O
5.DC.30Clearcreekite
(Hg-Hg)
 
1.5
[OH|CO
 
3
] · 2H
 
2
O
5.DC.35Niveolanite
NaBe(CO
 
3
)(OH)·2H
 
2
O

Other Names for Ancylite-(La)

Synonyms:
IMA1995-053
Other Languages:
German:Ankylith-(La)
Russian:Анкилит-(La)

Other Information

Other Information:Readily soluble in acids.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ancylite-(La)

Reference List:Mineralogical Record: 29: 233.

Zapiski Vserossiyskogo Mineral ogicheskogo Obshchestva: 126(1): 96-108.

Internet Links for Ancylite-(La)

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Ancylite-(La) in the Natural History Museum (London) online catalogue
  • Ancylite-(La) details from Handbook of Mineralogy (PDF)
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    Localities for Ancylite-(La)

    The 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. ? 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
        • Lajemmerais RCM
          • Varennes & St-Amable
            • Saint-Amable sill
    Greenland
     
    • Kitaa (West Greenland) Province
      • Narsaq
        • Ilimaussaq complex
          • Tasseq area
            • Tasseq Slopes (Taseq Slopes)
    Petersen, O.V., Johnsen, O., Niedermayr, G., Grice, J.D. (2004): Taseqite, a new member of the Eudialyte group from the Ilimaussaq alkaline complex, South Greenland, Neues Jahrbuch für Mineralogie, Monatshefte, 2004, No2, 83-96
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Buriatia (Buryatia) Republic
          • Vitim Plateau
            • Biraya and Bya Rivers confluence area (Chara Basin)
    A. Konev et al.: Eur. J. Min. 17(5):715–721 (2005)
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Kukisvumchorr Mt
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
            • Yukspor Mt
              • Hackman Valley
    Neues Jahrbuch für Mineralogie, Monatshefte (2003): 10: 461-480.
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 7th Nov 2009 02:20:33