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Mckelveyite-(Y)

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Vincent Ellis McKelvey
Formula:
NaCaBa3Y(CO3)6 · 3H2O
Colour:
Yellow, orange-brown, gray, greenish-brown, nearly black.
Lustre:
Vitreous, Greasy, Dull
Hardness:
3½ - 4
Specific Gravity:
3.25
Crystal System:
Triclinic
Member of:
Name:
For Vincent Ellis McKelvey (1916-1985), director of the USGS for his studies of the Phosphoria formation.
Donnayite Group

2M polytype known (proposal IMA2005-012a, now withdrawn).



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Classification of Mckelveyite-(Y)Hide

Approved
5.CC.05

5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
15.3.4.2

15 : HYDRATED NORMAL CARBONATES
3 : AmBn(XO3)p·xH2O, with (m+n):p = 1:1
11.8.20

11 : Carbonates
8 : Carbonates of the rare earths

Physical Properties of Mckelveyite-(Y)Hide

Vitreous, Greasy, Dull
Transparency:
Transparent, Translucent, Opaque
Colour:
Yellow, orange-brown, gray, greenish-brown, nearly black.
Hardness:
3½ - 4 on Mohs scale
Density:
3.25(5) g/cm3 (Measured)    3.37 g/cm3 (Calculated)

Optical Data of Mckelveyite-(Y)Hide

Type:
Biaxial (-)
RI values:
nα = 1.550 - 1.554 nβ = 1.550 - 1.554 nγ = 1.649 - 1.658
Max Birefringence:
δ = 0.099 - 0.104
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
weak to distinct
Pleochroism:
Visible
Comments:
In greens

Chemical Properties of Mckelveyite-(Y)Hide

Formula:
NaCaBa3Y(CO3)6 · 3H2O
IMA Formula:
NaBa3(Ca,U)Y(CO3)6 · 3H2O

Crystallography of Mckelveyite-(Y)Hide

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 9.170(3) Å, b = 9.169(3) Å, c = 7.075(2) Å
α = 102.50(3)°, β = 115.63(3)°, γ = 59.99(3)°
Ratio:
a:b:c = 1 : 1 : 0.772
Unit Cell V:
464.43 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Tabular to pyramidal pseudorhombohedral.
Twinning:
Threefold
Comment:
Triclinic polytype.

Type Occurrence of Mckelveyite-(Y)Hide

Place of Conservation of Type Material:
Smithsonian
Geological Setting of Type Material:
From core in the Green River formation

Synonyms of Mckelveyite-(Y)Hide

Other Language Names for Mckelveyite-(Y)Hide

Relationship of Mckelveyite-(Y) to other SpeciesHide

Member of:
Other Members of this group:
Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2OHex. 6mm
UM1992-05-CO:CaCeLaNaSr(Sr,Na,Y,REE,Ca,Ba)2(CO3)2 · H2OTrig. 3m : R3m
WeloganiteNa2Sr3Zr(CO3)6 · 3H2OTric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:
Donnayite-(Y)1 photo of Mckelveyite-(Y) associated with Donnayite-(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.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.15Lokkaite-(Y)Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2OOrth.
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 - Dana Grouping (8th Ed.)Hide

15.3.4.1Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
15.3.4.3Mckelveyite-(Nd)(Ba,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2OTric.
15.3.4.4WeloganiteNa2Sr3Zr(CO3)6 · 3H2OTric. 1 : P1

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.
11.8.11Lokkaite-(Y)Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2OOrth.
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
11.8.21Sahamalite-(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 Mckelveyite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1965): 50: 593-612.
American Mineralogist (1979): 64: 659.
American Mineralogist (1993): 78: 236-237.

Internet Links for Mckelveyite-(Y)Hide

Localities for Mckelveyite-(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.
Bolivia
 
  • Cochabamba Department
    • Ayopaya Province
Anthony R. Kampf
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
Italy
 
  • Lombardy
    • Sondrio Province
      • Valtellina
Demartin F., Gramaccioli C.M., Campostrini I., Diella V. (2008): Canadian Mineralogist, 46, 195-203.
          • Lanterna Valley
            • Lanzada
              • Mt. Motta
Demartin, F., Gramaccioli, C.M., Campostrini, I., Diella, V. (2008): The crystal structure of mckelveyite-(Y)-2M, a new monoclinic polytype from Val Malenco, Italian Alps. Canadian Mineralogist, 46, 195-203.
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
PEKOV, I.V. & NIKOLAEV, A.P. (2013) Minerals of the pegmatites and hydrothermal assemblages of the Koashva deposit (Khibiny, Kola Peninsula, Russia). Mineralogical Almanac 189(2), 7-65.
        • Kukisvumchorr Mt
[World of Stones 95:5-6, p64]
Pekov, I. et al (2003): New Data on Minerals: 38: 20-33.
Zaitsev, A.N., Yakovenchuk, V.N., Chao, G.Y., Gault, R.A., Subbotin, V.V., Pakhomovsky, Ya.A., Bogdanova, A.N. (1996): Kukharenkoite-(Ce), Ва2Се(СО3)3F, a new mineral from Kola Peninsula, Russia, and Québec, Canada. European Journal of Mineralogy, 8, 1327—1336; Pekov I.V. (1998): Minerals first discovered on the territory of the former Soviet Union. Ocean Picture, Moscow, 369 pp.; Zaitsev, A.N., Wall, F., Le Bas, M.J. (1998): REE-Sr-Ba minerals from the Khibina carbonatites, Kola peninsula, Russia: their mineralogy, paragenesis and evolution. Mineralogical Magazine, 62, 225-250; Yakovenchuk, V.N., Ivanyuk, G.Yu., Pakhomovsky, Ya.A., Men'shikov, Yu.P. (2005): Khibiny. Laplandia Minerals Ltd. (in association with the Mineralogical Society of Great Britain and Ireland), Apatity, 468 pp.
www.koeln.netsurf.de/~w.steffens/lovo.htm
      • Northern Karelia
www.koeln.netsurf.de/~w.steffens/vuori.htm; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Geology of Ore Deposits 50(7), 620-628.
USA (TL)
 
  • Wyoming
    • Sweetwater Co.
      • Green River Formation
Am Min 50:593-612
Mineral and/or Locality  
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