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Lokkaite-(Y)

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Formula:
Ca(Y,Gd,Nd,Dy)
 
4
(CO
 
3
)
 
7
· 9H
 
2
O
System:OrthorhombicColour:snow white
Member of:Tengerite Group
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, Western and Inner Finland Region, 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
Simplified for copy/paste:Ca(Y,Gd,Nd,Dy)4(CO3)7·9H2O
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

Member of:Tengerite Group
Other Members of Group:

- +
Hizenite-(Y)
Ca
 
2
Y
 
6
(CO
 
3
)
 
11
· 14H
 
2
O
Kimuraite-(Y)
Ca(Y,Nd)
 
2
(CO
 
3
)
 
4
· 6H
 
2
O
Tengerite-(Y)
Y
 
2
(CO
 
3
)
 
3
· 2-3H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
5.CC.05Donnayite-(Y)
NaCaSr
 
3
Y(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)
NaCaBa
 
3
Y(CO
 
3
)
 
6
· 3H
 
2
O
5.CC.05Weloganite
Na
 
2
Sr
 
3
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
(OH)
 
5
Cl · 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)(CO
 
3
)(OH,F)
11.8.6Hydroxylbastnäsite-(Nd)
(Nd,Ce,La)(CO
 
3
)(OH,F)
11.8.7Hydroxylbastnäsite-(La)
(La,Nd,Ce)(CO
 
3
)(OH,F)
11.8.8Rémondite-(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)
Ca(Nd,La,Ce)(CO
 
3
)
 
2
(OH)
 
.
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)
NaCaSr
 
3
Y(CO
 
3
)
 
6
· 3H
 
2
O
11.8.17Carbocernaite
(Ca,Na)(Sr,Ce,Ba)(CO
 
3
)
 
2
11.8.18Ancylite-(Ce)
SrCe(CO
 
3
)
 
2
(OH) · H
 
2
O
11.8.19Ewaldite
Ba(Ca,Y,Na,K)(CO
 
3
)
 
2
11.8.20Mckelveyite-(Y)
NaCaBa
 
3
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
Simplified Chinese:水碳钇石
Spanish:Lokkaita
Traditional Chinese:水碳釔石

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.

Internet Links for Lokkaite-(Y)

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Lokkaite-(Y) details from Handbook of Mineralogy (PDF)
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  • Localities for Lokkaite-(Y)

    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
     
    • Ontario
      • Haliburton Co.
        • Cardiff Township
    Reiner Mielke 2011
    • Québec
      • Outaouais
        • Les Collines-de-l'Outaouais RCM
          • Val-des-Monts
            • Lac Saint-Pierre (Wakefield Lake)
    Hogarth, D.D., Chao, G.Y., Plant. G.A. & Steacy, H. R. (1974): Caysichite, a new silico-carbonate of yttrium and calcium. Canadian Mineralogist.12: 293-298
    Finland
     
    • Western and Inner Finland Region
      • Kangasala
    Am Min 71 (1986), 1028; Perttunen 1971 Bulletin of the Geological Society of Finland 43
    Japan
     
    • Kyushu Region
      • Saga Prefecture
        • Karatsu City (Higashi-Matsuura-gun)
          • Hizen-cho
    American Mineralogist: 71(7-8): 1028-1033.
    Norway
     
    • Nordland
      • Tysfjord
    Neumann, H. (1985): Norges Mineraler. Norges Geologiske Undersøkelse Skrifter 68, 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 norwegian9
      • Skien
        • Kilebygda
    Neumann, H. (1985): Norges Mineraler. Norges Geologiske Undersøkelse Skrifter 68 (p. 102).
    Sweden
     
    • Lappland
      • Jokkmokk
    No reference listed
    • Uppland
      • Vaxholm
        • Resarö
    No reference listed
    USA
     
    • Georgia
      • Wilkes Co.
    Julian Gray
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