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Lokkaite-(Y)

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Tangen Quarry, Kragerø, Telemark, Norway
© Knut Eldjarn

Show Lokkaite-(Y) Photos (2)
Formula:
Ca(Y,Gd,Nd,Dy)
 
4
[CO
 
3
]
 
7
 · 9H
 
2
O
System:OrthorhombicColour:snow white
This page provides mineralogical data about Lokkaite-(Y).

Classification of Lokkaite-(Y)

IMA status:Approved 1969
Strunz 8th edition ID:5/D.03-60
Nickel-Strunz 10th (pending) edition ID:5.CC.15

5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
Dana 8th edition ID:15.4.4.1

15 : HYDRATED NORMAL CARBONATES
4 : AmBn(XO3)p·xH2O, with (m+n):p < 1:1
Hey's CIM Ref.:11.8.11

11 : Carbonates
8 : Carbonates of the rare earths
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Type Occurrence of Lokkaite-(Y)

Type Locality:Pyörönmaa pegmatite, Kangasala, Länsi-Suomen Lääni, Finland

Physical Properties of Lokkaite-(Y)

Colour:snow white
Streak:white

Crystallography of Lokkaite-(Y)

Crystal System:Orthorhombic

Optical Data of Lokkaite-(Y)

Type:Biaxial
RI values: nα = 1.569 nβ = 1.592 nγ = 1.620
Maximum Birefringence:δ = 0.051

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

Chemical Properties of Lokkaite-(Y)

Formula:
Ca(Y,Gd,Nd,Dy)
 
4
[CO
 
3
]
 
7
 · 9H
 
2
O
Essential elements:C, Ca, H, O, Y
All elements listed in formula:C, Ca, Dy, Gd, H, Nd, O, Y

Relationship of Lokkaite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.CC.05Donnayite-(Y)
Sr
 
3
NaCaY(CO
 
3
)
 
6
·3H
 
2
O
5.CC.05Ewaldite
Ba(Ca,Y,Na,K)(CO
 
3
)
 
2
5.CC.05Mckelveyite-(Nd)
(Ba,Sr)(Nd,Ce,La)(CO
 
3
)
 
2
·4-10H
 
2
O
5.CC.05Mckelveyite-(Y)
Ba
 
3
Na(Ca,U)Y(CO
 
3
)
 
6
·3H
 
2
O
5.CC.05Weloganite
Sr
 
3
Na
 
2
Zr(CO
 
3
)
 
6
·3H
 
2
O
5.CC.10Tengerite-(Y)
Y
 
2
[CO
 
3
]
 
3
 · 2-3H
 
2
O
5.CC.15Kimuraite-(Y)
Ca(Y,Nd)
 
2
[CO
 
3
]
 
4
 · 6H
 
2
O
5.CC.20Shomiokite-(Y)
Na
 
3
Y[CO
 
3
]
 
3
 · 3H
 
2
O
5.CC.25Calkinsite-(Ce)
(Ce,La)
 
2
[CO
 
3
]
 
3
 · 4H
 
2
O
5.CC.25Lanthanite-(Ce)
(Ce,La,Nd)
 
2
[CO
 
3
]
 
3
 · 8H
 
2
O
5.CC.25Lanthanite-(La)
(La,Ce)
 
2
[CO
 
3
]
 
3
 · 8H
 
2
O
5.CC.25Lanthanite-(Nd)
(Nd,La)
 
2
[CO
 
3
]
 
3
 · 8H
 
2
O
5.CC.30Adamsite-(Y)
NaY[CO
 
3
]
 
2
 · 6H
 
2
O
5.CC.35Decrespignyite-(Y)
Cu(Y,REE)
 
4
(CO
 
3
)
 
4
Cl(OH)
 
5
·2H
 
2
O
5.CC.40Galgenbergite-(Ce)
Ca(Ce,La,Nd)
 
2
[CO
 
3
]
 
4
 · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
11.8.1Calkinsite-(Ce)
(Ce,La)
 
2
[CO
 
3
]
 
3
 · 4H
 
2
O
11.8.2Lanthanite-(La)
(La,Ce)
 
2
[CO
 
3
]
 
3
 · 8H
 
2
O
11.8.3Lanthanite-(Ce)
(Ce,La,Nd)
 
2
[CO
 
3
]
 
3
 · 8H
 
2
O
11.8.4Lanthanite-(Nd)
(Nd,La)
 
2
[CO
 
3
]
 
3
 · 8H
 
2
O
11.8.5Hydroxylbastnäsite-(Ce)
(Ce,La)[(OH,F)|CO
 
3
]
11.8.6Hydroxylbastnäsite-(Nd)
(Nd,Ce,La)[(OH,F)|CO
 
3
]
11.8.7Hydroxylbastnäsite-(La)
(La,Ce)[(OH,F)|CO
 
3
]
11.8.8Remondite-(Ce)
Na
 
3
(Ce,La,Ca,Na,Sr)
 
3
(CO
 
3
)
 
5
11.8.9Tengerite-(Y)
Y
 
2
[CO
 
3
]
 
3
 · 2-3H
 
2
O
11.8.10Kimuraite-(Y)
Ca(Y,Nd)
 
2
[CO
 
3
]
 
4
 · 6H
 
2
O
11.8.12Calcioancylite-(Nd)
(Nd,Ce)
 
3
Ca(CO
 
3
)
 
4
(OH)
 
3
·H
 
2
O
11.8.13Calcioancylite-(Ce)
(Ca,Sr)Ce(CO
 
3
)
 
2
OH·H
 
2
O
11.8.14Burbankite
(Na,Ca)
 
3
(Sr,Ba,Ce)
 
3
(CO
 
3
)
 
5
11.8.15Khanneshite
(Na,Ca)
 
3
(Ba,Sr,Ce,Ca)
 
3
(CO
 
3
)
 
5
11.8.16Donnayite-(Y)
Sr
 
3
NaCaY(CO
 
3
)
 
6
·3H
 
2
O
11.8.17Carbocernaite
(Ca,Na)(Sr,Ce,Ba)(CO
 
3
)
 
2
11.8.18Ancylite-(Ce)
SrCe[OH|(CO
 
3
)
 
2
] · H
 
2
O
11.8.19Ewaldite
Ba(Ca,Y,Na,K)(CO
 
3
)
 
2
11.8.20Mckelveyite-(Y)
Ba
 
3
Na(Ca,U)Y(CO
 
3
)
 
6
·3H
 
2
O
11.8.21Sahamalite-(Ce)
(Mg,Fe)(Ce,La,Nd)
 
2
(CO
 
3
)
 
4

Other Names for Lokkaite-(Y)

Synonyms:
IMA1969-045Lokkaite
Other Languages:
German:Lokkait
Spanish:Lokkaita

Other Information

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 Lokkaite-(Y)

Reference List:American Mineralogist (1971): 56: 1838.

American Mineralogist (1986): 71: 1028-1033.

American Mineralogist (1993): 78: 425-432.

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Internet Links for Lokkaite-(Y)

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    Localities for Lokkaite-(Y)

    Hide Locality List
    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.
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    (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
      • Papineau Co.
        • Portland Township
          • St-Pierre-de-Wakefield
    		No reference listed
    Finland
     
    • Länsi-Suomen Lääni
      • Kangasala
    		Am Min 71 (1986), 1028
    Japan
     
    • Kyushu Island
      • Saga Prefecture
        • Higashi-Matsuura-gun
          • Hizen-cho
    		American Mineralogist: 71(7-8): 1028-1033.
    Norway
     
    • Nordland
      • Tysfjord
    		R. Kristiansen (1975, pers. com.); Neumann (1985, p. 102).
    • Telemark
      • Kragerø
    		Kristiansen, R.(1978):"Lokkaitt, (Y,Ca)2(CO3)3 x 2H2O, ett nytt mineral for Norge" NAGS-nytt 5(4), 26-27 (in norwegian); Neumann (1985, p. 102).
      • Skien
    		R. Kristiansen (1975, pers. com.); Neumann (1985, p. 102).
    Sweden
     
    • Lappland
      • Jokkmokk
    		No reference listed
    • Uppland
      • Vaxholm
        • Resarö
    		No reference listed
    Mineral and/or Locality
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