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Lokkaite-(Y)

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


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Classification of Lokkaite-(Y)Hide

Approved
Approval Year:
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

Physical Properties of Lokkaite-(Y)Hide

Colour:
snow white
Streak:
white

Optical Data of Lokkaite-(Y)Hide

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)Hide

Formula:
Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O
IMA Formula:
CaY4(CO3)7 · 9H2O

Crystallography of Lokkaite-(Y)Hide

Crystal System:
Orthorhombic

Type Occurrence of Lokkaite-(Y)Hide

Synonyms of Lokkaite-(Y)Hide

Other Language Names for Lokkaite-(Y)Hide

German:Lokkait
Simplified Chinese:水碳钇石
Spanish:Lokkaita
Traditional Chinese:水碳釔石

Relationship of Lokkaite-(Y) to other SpeciesHide

Member of:
Other Members of this group:
Hizenite-(Y)Ca2Y6(CO3)11 · 14H2O Orth.
Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2OOrth.
Tengerite-(Y)Y2(CO3)3 · 2-3H2OOrth. mmm (2/m 2/m 2/m) : Pnnm

Common AssociatesHide

Associated Minerals Based on Photo Data:
Kimuraite-(Y)9 photos of Lokkaite-(Y) associated with Kimuraite-(Y) on mindat.org.
Tengerite-(Y)1 photo of Lokkaite-(Y) associated with Tengerite-(Y) on mindat.org.
Fergusonite-(Y)1 photo of Lokkaite-(Y) associated with Fergusonite-(Y) on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.CC.05Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
5.CC.05EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2OHex. 6mm
5.CC.05Mckelveyite-(Nd)(Ba,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2OTric.
5.CC.05Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2OTric. 1 : P1
5.CC.05WeloganiteNa2Sr3Zr(CO3)6 · 3H2OTric. 1 : P1
5.CC.10Tengerite-(Y)Y2(CO3)3 · 2-3H2OOrth. mmm (2/m 2/m 2/m) : Pnnm
5.CC.15Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2OOrth.
5.CC.20Shomiokite-(Y)Na3Y[CO3]3 · 3H2OOrth.
5.CC.25Calkinsite-(Ce)(Ce,La)2(CO3)3 · 4H2OOrth.
5.CC.25Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2OOrth. mmm (2/m 2/m 2/m)
5.CC.25Lanthanite-(La)(La,Ce)2(CO3)3 · 8H2OOrth.
5.CC.25Lanthanite-(Nd)(Nd,La)2(CO3)3 · 8H2OOrth.
5.CC.30Adamsite-(Y)NaY[CO3]2 · 6H2OTric. 1 : P1
5.CC.35Decrespignyite-(Y)Cu(Y,REE)4(CO3)4(OH)5Cl · 2H2OMon.
5.CC.40Galgenbergite-(Ce)Ca(Ce,La,Nd)2(CO3)4 · H2OTric.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.8.1Calkinsite-(Ce)(Ce,La)2(CO3)3 · 4H2OOrth.
11.8.2Lanthanite-(La)(La,Ce)2(CO3)3 · 8H2OOrth.
11.8.3Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2OOrth. mmm (2/m 2/m 2/m)
11.8.4Lanthanite-(Nd)(Nd,La)2(CO3)3 · 8H2OOrth.
11.8.5Hydroxylbastnäsite-(Ce)Ce(CO3)(OH)Hex. 6 : P6
11.8.6Hydroxylbastnäsite-(Nd)Nd(CO3)(OH)Hex.
11.8.7Hydroxylbastnäsite-(La)(La,Nd,Ce)(CO3)(OH,F)Hex.
11.8.8Rémondite-(Ce)Na3(Ce,La,Ca,Na,Sr)3(CO3)5Mon. 2 : P21
11.8.9Tengerite-(Y)Y2(CO3)3 · 2-3H2OOrth. mmm (2/m 2/m 2/m) : Pnnm
11.8.10Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2OOrth.
11.8.12Calcioancylite-(Nd)Ca(Nd,La,Ce)(CO3)2(OH).H2OMon. m : Pm
11.8.13Calcioancylite-(Ce)(Ce,Ca,Sr)Ce(CO3)(OH,H2O)Orth. mmm (2/m 2/m 2/m)
11.8.14Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5Hex. 6mm : P63mc
11.8.15Khanneshite(Na,Ca)3(Ba,Sr,Ce,Ca)3(CO3)5Hex.
11.8.16Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
11.8.17Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2Orth. mm2
11.8.18Ancylite-(Ce)CeSr(CO3)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
11.8.19EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2OHex. 6mm
11.8.20Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2OTric. 1 : P1
11.8.21Sahamalite-(Ce)(Mg,Fe)(Ce,La,Nd)2(CO3)4Mon. 2/m : P21/b

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 Lokkaite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1971): 56: 1838.
American Mineralogist (1986): 71: 1028-1033.
American Mineralogist (1993): 78: 425-432.

Internet Links for Lokkaite-(Y)Hide

Localities for Lokkaite-(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
 
  • 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 (TL)
 
  • Western and Inner Finland Region
    • Valkeakoski
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.
      • Jacksons Crossroads
Julian Gray
Mineral and/or Locality  
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