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Unnamed (MSH UK-37A)

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Sr3NaCaY(CO3)6 · 3H2O
White, Grey, Brown, Green-Grey
Crystal System:
Currently unnamed - from Mont Saint-Hilaire, Quebec, Canada
Probably the Sr analogue of ewaldite. The correct name is UM1986-09-CO:CaHNaSrY.

The UM1992-05-CO:CaCeLaNaSr is suggested to be polymorphous, but its chemistry may slightly be different.

Occurs as barrel- and pagoda-shaped crystals, macroscopically indistinguishable from ewaldite, donnayite-(Y), and mckelveyite-(Y).

Environment: silicate cavities, carbonate cavities, pegmatites, and igneous breccia.

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Classification of Unnamed (MSH UK-37A)Hide

Unnamed (probably valid)

Physical Properties of Unnamed (MSH UK-37A)Hide

White, Grey, Brown, Green-Grey

Chemical Properties of Unnamed (MSH UK-37A)Hide

Sr3NaCaY(CO3)6 · 3H2O

Crystallography of Unnamed (MSH UK-37A)Hide

Crystal System:
Class (H-M):
6mm - Dihexagonal Pyramidal
Space Group:
Cell Parameters:
a = 5.193(1) Å, c = 12.25(1) Å
a:c = 1 : 2.359
Unit Cell V:
286.09 ų (Calculated from Unit Cell)
Barrel and Pagoda shaped crystals

X-Ray Powder DiffractionHide

Powder Diffraction Data:

Synonyms of Unnamed (MSH UK-37A)Hide

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 Unnamed (MSH UK-37A)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Rocks & Minerals: 61: 182
Mineral. Record: 21: 363
Chao, G.Y., Conlon, R.P., Van Velthuizen, J. (1990): Mont Saint-Hilaire unknowns. Mineral. Record: 21(4): 363-368; in: Jambor, J.L., Grew, E.S. (1991): New mineral Names. American Mineralogist: 75: 302
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; (2016)

Internet Links for Unnamed (MSH UK-37A)Hide

Localities for Unnamed (MSH UK-37A)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.
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
A. Steed (pers. comm.)
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