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Mckelveyite-(Y)

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Formula:
NaCaBa
 
3
Y(CO
 
3
)
 
6
· 3H
 
2
O
System:TriclinicColour:Yellow, orange-brown, ...
Hardness:3½ - 4
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2M polytype known (proposal IMA2005-012a, now withdrawn).

Classification of Mckelveyite-(Y)

IMA status:Approved
Strunz 8th edition ID:5/D.04-20
Nickel-Strunz 10th (pending) edition ID:5.CC.05

5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
Dana 8th edition ID:15.3.4.2

15 : HYDRATED NORMAL CARBONATES
3 : AmBn(XO3)p·xH2O, with (m+n):p = 1:1
Hey's CIM Ref.:11.8.20

11 : Carbonates
8 : Carbonates of the rare earths
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Type Occurrence of Mckelveyite-(Y)

Type Locality:Diamond Alkali Daco No. 3, Green River Formation, Sweetwater Co., Wyoming, USA
Place of Conservation of Type Material:Smithsonian
Geological Setting of type material:From core in the Green River formation

Physical Properties of Mckelveyite-(Y)

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

Crystallography of Mckelveyite-(Y)

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 Volume:V 464.43 ų (Calculated from Unit Cell)
Z:1
Morphology:Tabular to pyramidal pseudorhombohedral.
Twinning:Threefold

Optical Data of Mckelveyite-(Y)

Type:Biaxial (-)
RI values: nα = 1.550 - 1.554 nβ = 1.550 - 1.554 nγ = 1.649 - 1.658
Maximum Birefringence:δ = 0.099 - 0.104

Chart 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)

Formula:
NaCaBa
 
3
Y(CO
 
3
)
 
6
· 3H
 
2
O
Simplified for copy/paste:NaCaBa3Y(CO3)6·3H2O
Essential elements:Ba, C, Ca, H, Na, O, Y
All elements listed in formula:Ba, C, Ca, H, Na, O, Y

Relationship of Mckelveyite-(Y) to other Species

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.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.15Lokkaite-(Y)
Ca(Y,Gd,Nd,Dy)
 
4
(CO
 
3
)
 
7
· 9H
 
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
11.8.11Lokkaite-(Y)
Ca(Y,Gd,Nd,Dy)
 
4
(CO
 
3
)
 
7
· 9H
 
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
11.8.21Sahamalite-(Ce)
(Mg,Fe)(Ce,La,Nd)
 
2
(CO
 
3
)
 
4

Other Names for Mckelveyite-(Y)

Synonyms:
Mackelveyite-(Y)
Other Languages:
German:Mckelveyit-(Y)

Polytypes for Mckelveyite-(Y)

Polytypes:
Mckelveyite-(Y)-2M

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 Mckelveyite-(Y)

Reference List:

- +
American Mineralogist (1965): 50: 593-612.

American Mineralogist (1979): 64: 659.

American Mineralogist (1993): 78: 236-237.

Internet Links for Mckelveyite-(Y)

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  • Raman and XRD data at RRUFF project
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  • Mckelveyite-(Y) details from Handbook of Mineralogy (PDF)
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  • Localities for Mckelveyite-(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
     
    • 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
    Demartin F., Gramaccioli C.M., Campostrini I., Diella V. (2008): Canad.Mineral., 46, 195-203.
          • Lanzada
    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
      • Murmanskaja Oblast'
        • Kola Peninsula
          • 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.
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    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.
        • 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
    USA
     
    • Wyoming
      • Sweetwater Co.
        • Green River Formation
    Am Min 50:593-612
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