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Lokkaite-(Y)

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Formula:
Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O
System:
Orthorhombic
Colour:
snow white
Member of:
This page provides mineralogical data about Lokkaite-(Y).

Classification of Lokkaite-(Y)

Approved 1969
5.CC.15

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

15 : HYDRATED NORMAL CARBONATES
4 : AmBn(XO3)p·xH2O, with (m+n):p < 1:1
11.8.11

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

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
Max Birefringence:
δ = 0.051
Image 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(CO3)7 · 9H2O
Essential elements:
All elements listed in formula:

Relationship of Lokkaite-(Y) to other Species

Member of:
Other Members of Group:
Hizenite-(Y)Ca2Y6(CO3)11 · 14H2O
Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2O
Tengerite-(Y)Y2(CO3)3 · 2-3H2O
5.CC.05Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2O
5.CC.05EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O
5.CC.05Mckelveyite-(Nd)(Ba,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2O
5.CC.05Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2O
5.CC.05WeloganiteNa2Sr3Zr(CO3)6 · 3H2O
5.CC.10Tengerite-(Y)Y2(CO3)3 · 2-3H2O
5.CC.15Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2O
5.CC.20Shomiokite-(Y)Na3Y[CO3]3 · 3H2O
5.CC.25Calkinsite-(Ce)(Ce,La)2(CO3)3 · 4H2O
5.CC.25Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2O
5.CC.25Lanthanite-(La)(La,Ce)2(CO3)3 · 8H2O
5.CC.25Lanthanite-(Nd)(Nd,La)2(CO3)3 · 8H2O
5.CC.30Adamsite-(Y)NaY[CO3]2 · 6H2O
5.CC.35Decrespignyite-(Y)Cu(Y,REE)4(CO3)4(OH)5Cl · 2H2O
5.CC.40Galgenbergite-(Ce)Ca(Ce,La,Nd)2(CO3)4 · H2O
11.8.1Calkinsite-(Ce)(Ce,La)2(CO3)3 · 4H2O
11.8.2Lanthanite-(La)(La,Ce)2(CO3)3 · 8H2O
11.8.3Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2O
11.8.4Lanthanite-(Nd)(Nd,La)2(CO3)3 · 8H2O
11.8.5Hydroxylbastnäsite-(Ce)(Ce,La)(CO3)(OH,F)
11.8.6Hydroxylbastnäsite-(Nd)(Nd,Ce,La)(CO3)(OH,F)
11.8.7Hydroxylbastnäsite-(La)(La,Nd,Ce)(CO3)(OH,F)
11.8.8Rémondite-(Ce)Na3(Ce,La,Ca,Na,Sr)3(CO3)5
11.8.9Tengerite-(Y)Y2(CO3)3 · 2-3H2O
11.8.10Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2O
11.8.12Calcioancylite-(Nd)Ca(Nd,La,Ce)(CO3)2(OH).H2O
11.8.13Calcioancylite-(Ce)(Ca,Sr)Ce(CO3)2(OH) · H2O
11.8.14Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
11.8.15Khanneshite(Na,Ca)3(Ba,Sr,Ce,Ca)3(CO3)5
11.8.16Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2O
11.8.17Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2
11.8.18Ancylite-(Ce)SrCe(CO3)2(OH) · H2O
11.8.19EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O
11.8.20Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2O
11.8.21Sahamalite-(Ce)(Mg,Fe)(Ce,La,Nd)2(CO3)4

Other Names for Lokkaite-(Y)

Name in Other Languages:
German:Lokkait
Simplified Chinese:水碳钇石
Spanish:Lokkaita
Traditional Chinese:水碳釔石

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 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)

Localities for Lokkaite-(Y)

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
 
  • 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.
Miyawaki R, Matsubara S, Yokoyama K, Iwano S, Hamasaki K, Yukinori I (2003) Kozoite-(La), La(CO3)(OH), a new mineral from Mitsukoshi, Hizen-cho, Saga Prefecture, Japan. Journal of Mineralogical and Petrological Sciences 98, 137-141
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
Mineral and/or Locality  
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