Lokkaite-(Y) (original) (raw)
A valid IMA mineral species
About Lokkaite-(Y)Hide
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Formula:
Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O
Colour:
snow white, may be discolored to pale yellow.
Specific Gravity:
2.92 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor of Lauri Lokka (1885–1966), Finnish mineralogist and Chief Chemist, Geological Survey of Finland, Helsinki, Finland.
This page provides mineralogical data about Lokkaite-(Y).
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:2427:9
f90622c6-be47-49c5-bd45-03b5e38ae408
IMA Classification of Lokkaite-(Y)Hide
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IMA Formula:
CaY4(CO3)7 · 9H2O
Type description reference:
Classification of Lokkaite-(Y)Hide
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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
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Lok-Y | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Lokkaite-(Y)Hide
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Colour:
snow white, may be discolored to pale yellow.
Density:
2.92 g/cm3 (Calculated)
Optical Data of Lokkaite-(Y)Hide
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RI values:
_n_α = 1.569 _n_β = 1.592 _n_γ = 1.620
δ = 0.051
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of Lokkaite-(Y)Hide
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Mindat Formula:
Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O
Crystallography of Lokkaite-(Y)Hide
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Crystal System:
Orthorhombic
Cell Parameters:
a = 39.21(18) Å, b = 6.950(11) Å, c = 9.22(4) Å
Ratio:
a:b:c = 5.642 : 1 : 1.327
Unit Cell V:
2,512.54 ų (Calculated from Unit Cell)
Morphology:
Fibrous crystal bundles, powdery incrustations.
Comment:
Point Group: 2/m 2/m 2/m or mm2.; Space Group: P bmm, P b2m, or P bm2.
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.808 Å | (100) |
| 4.594 Å | (75) |
| 3.902 Å | (60) |
| 6.509 Å | (55) |
| 9.77 Å | (50) |
| 5.792 Å | (45) |
| 2.931 Å | (40) |
Geological EnvironmentHide
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Type Occurrence of Lokkaite-(Y)Hide
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Geological Setting of Type Material:
secondary mineral formed by alteration of primary rare-earth minerals.
Associated Minerals at Type Locality:
Reference:
Perttunen, V. (1970) Lokkaite, a new hydrous RE-carbonate from Pyörönmaa pegmatite in Kangasala, SW-Finland. Bulletin of the Geological Society of Finland: 43: 67-72.
Synonyms of Lokkaite-(Y)Hide
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Other Language Names for Lokkaite-(Y)Hide
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Simplified Chinese:水碳钇石
Traditional Chinese:水碳釔石
Relationship of Lokkaite-(Y) to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 5.CC. | Alicewilsonite-(YCe) | Na2Sr2YCe(CO3)6 · 3H2O | Tric. 1 : _P_1 |
|---|---|---|---|
| 5.CC. | Yuchuanite-(Y) | Y2(CO3)3 · H2O | Tric. 1 : _P_1 |
| 5.CC. | Bainbridgeite-(NdCe) | Na2Ba2NdCe(CO3)6 · 3H2O | Tric. 1 : _P_1 |
| 5.CC.05 | Donnayite-(Y) | NaCaSr3Y(CO3)6 · 3H2O | Tric. 1 : _P_1 |
| 5.CC.05 | Ewaldite | Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O | Hex. 6_m_ m : P_63_m c |
| 5.CC.05 | Mckelveyite-(Nd) | NaCaBa3Nd(CO3)6 · 3H2O | Mon. m : B b |
| 5.CC.05 | Mckelveyite-(Y) | NaCaBa3Y(CO3)6 · 3H2O | Tric. 1 : _P_1 |
| 5.CC.05 | Weloganite | Na2Sr3Zr(CO3)6 · 3H2O | Tric. 1 : _P_1 |
| 5.CC.05 | Unnamed (MSH UK-37A) | Sr3NaCaY(CO3)6 · 3H2O | Hex. 6_m_ m : P_63_m c |
| 5.CC.05 | UM1992-05-CO:CaCeLaNaSr | (Sr,Na,Y,REE,Ca,Ba)2(CO3)2 · H2O | Trig. 3_m_ : R_3_m |
| 5.CC.05 | Mckelveyite Group | A3B3(CO3)6 · 3H2O | |
| 5.CC.05 | Bainbridgeite-(YCe) | Na2Ba2YCe(CO3)6 · 3H2O | Tric. 1 : _P_1 |
| 5.CC.05 | Alicewilsonite-(YLa) | Na2Sr2YLa(CO3)6 · 3H2O | Tric. 1 : _P_1 |
| 5.CC.10 | Tengerite-(Y) | Y2(CO3)3 · 2-3H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 5.CC.15 | Kimuraite-(Y) | Ca(Y,Nd)2(CO3)4 · 6H2O | Orth. |
| 5.CC.15 | Hizenite-(Y) | Ca2Y6(CO3)11 · 14H2O | Orth. |
| 5.CC.20 | Shomiokite-(Y) | Na3Y[CO3]3 · 3H2O | Orth. m _m_2 |
| 5.CC.25 | Calkinsite-(Ce) | (Ce,La)2(CO3)3 · 4H2O | Orth. |
| 5.CC.25 | Lanthanite-(Ce) | (Ce,La,Nd)2(CO3)3 · 8H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.CC.25 | Lanthanite-(La) | (La,Ce)2(CO3)3 · 8H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.CC.25 | Lanthanite-(Nd) | (Nd,La)2(CO3)3 · 8H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.CC.30 | Adamsite-(Y) | NaY[CO3]2 · 6H2O | Tric. 1 : _P_1 |
| 5.CC.35 | Decrespignyite-(Y) | Cu(Y,REE)4(CO3)4(OH)5Cl · 2H2O | Mon. |
| 5.CC.40 | Galgenbergite-(Ce) | Ca(Ce,La,Nd)2(CO3)4 · H2O | Tric. 1 : _P_1 |
| 5.CC.45 | Lecoqite-(Y) | Na3Y(CO3)3 · 6H2O | Hex. 6 : _P_63 |
Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Lokkaite-(Y)Hide
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References for Lokkaite-(Y)Hide
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Reference List:
Nagashima, K., Miyawaki, R., Takase, J., Nakai, I., Sakurai, K., Matsubara, S., Kato, A., Iwano, S. (1986) Kimuraite, CaY2(CO3)4·6H2O, a new mineral from fissures in an alkali olivine basalt from Saga Prefecture, Japan, and new data on lokkaite. American Mineralogist, 71 (7-8) 1028-1033
Localities for Lokkaite-(Y)Hide
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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
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Canada | |
|---|---|
| Ontario Haliburton County Highlands East Township Cardiff Township ⓘ Cardiff Uranium Mine | Reiner Mielke 2011 |
| Québec Outaouais Les Collines-de-l'Outaouais RCM Val-des-Monts Saint-Pierre-de-Wakefield Lake Saint-Pierre ⓘ Evans-Lou Mine | Hogarth et al. (1974) |
| Finland (TL) | |
| Pirkanmaa Valkeakoski ⓘ Pyörönmaa pegmatite (TL) | Perttunen 1971 Bulletin of the ... +1 other reference |
| Japan | |
| Saga Prefecture Higashimatsuura district Genkai-cho Hinodematsu ⓘ Higashimatsuura basalt | Takai et al. (2010) |
| Karatsu City Hizen-cho ⓘ Kirigo | American Mineralogist: 71 (7-8) |
| ⓘ Mitsukoshi | Miyawaki et al. (2003) |
| Norway | |
| Nordland Narvik ⓘ Hundholmen | Neumann (1985) |
| Telemark Kragerø ⓘ Tangen Feldspar Mine | Kristiansen (1975) +1 other reference |
| Skien Kilebygda ⓘ Gislesjø ? | Neumann (1985) |
| Sweden | |
| Norrbotten County Jokkmokk ⓘ Ruoutevare | |
| Stockholm County Vaxholm Resarö ⓘ Ytterby | |
| USA | |
| Georgia Wilkes County Jacksons Crossroads ⓘ Jackson Crossroads Amethyst Mine (JXR Amethyst Mine) | Julian Gray |