Ewaldite
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About Ewaldite
Formula:
Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O
Colour:
Bluish green, pale greenish gray
Specific Gravity:
3.25 - 5
Crystal System:
Hexagonal
Member of:
Name:
Named in honor of Paul Peter Ewald (23 January 1888, Berlin, Germany – 22 August 1985, Ithaca, New York, USA), physicist, crystallographer, and Professor at the Polytechnic Institute of New York, Brooklyn, New York,
USA. He was a pioneer in the field of X-ray diffraction and founded the journal Acta Crystallographica.
USA. He was a pioneer in the field of X-ray diffraction and founded the journal Acta Crystallographica.
Type Locality:
This page provides mineralogical data about Ewaldite.
Classification of Ewaldite
Approved
Approval year:
1969
First published:
1971
Approval history:
IMA1969-013
5/D.04-05
5.CC.05
5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
14.2.4.1
14 : ANHYDROUS NORMAL CARBONATES
2 : AB(XO3)2
14 : ANHYDROUS NORMAL CARBONATES
2 : AB(XO3)2
11.8.19
11 : Carbonates
8 : Carbonates of the rare earths
11 : Carbonates
8 : Carbonates of the rare earths
Physical Properties of Ewaldite
Transparency:
Translucent
Colour:
Bluish green, pale greenish gray
Density:
3.25 - 5 g/cm3 (Measured) 3.37 g/cm3 (Calculated)
Comment:
measured on impure material
Optical Data of Ewaldite
Type:
Uniaxial (-)
RI values:
nω = 1.646 nε = 1.572
Max Birefringence:
δ = 0.074

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Visible
Comments:
O = dark bluish green; E = pale yellowish green
Chemical Properties of Ewaldite
Formula:
Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O
Common Impurities:
TR,La,Pr,Nd,Gd,Tb,Dy
Crystallography of Ewaldite
Crystal System:
Hexagonal
Class (H-M):
6mm - Dihexagonal Pyramidal
Space Group:
P63mc
Cell Parameters:
a = 5.31 Å, c = 12.83 Å
Ratio:
a:c = 1 : 2.416
Unit Cell V:
313.29 ų (Calculated from Unit Cell)
Z:
2
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0015637 | Ewaldite | Donnay G, Preston H (1971) Ewaldite, a new barium calcium carbonate II. Its crystal structure Tschermaks Mineralogische und Petrographische Mitteilungen 15 201-212 | 1971 | 0 | 293 |
CIF Raw Data - click here to close
Type Occurrence of Ewaldite
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1971,137.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 121 683.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 121 683.
Associated Minerals at Type Locality:
Reference:
Donnay, G., Donnay, J.D.H., Hey, M.H. (1971) Ewaldite, a new barium calcium carbonate. Part I. Tschermaks Mineralogische und Petrologische Mitteilungen: 15: 185-200.
Synonyms of Ewaldite
Other Language Names for Ewaldite
Relationship of Ewaldite to other Species
Member of:
Other Members of this group:
Donnayite-(Y) | NaCaSr3Y(CO3)6 · 3H2O | Tric. 1 : P1 |
UM1992-05-CO:CaCeLaNaSr | (Sr,Na,Y,REE,Ca,Ba)2(CO3)2 · H2O | Trig. 3m : R3m |
Weloganite | Na2Sr3Zr(CO3)6 · 3H2O | Tric. 1 : P1 |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Nickel-Strunz Grouping
5.CC. | Alicewilsonite-(YCe) | Na2Sr2YCe(CO3)6 · 3H2O | Tric. 1 : P1 |
5.CC. | Bainbridgeite-(YCe) | Na2Ba2YCe(CO3)6 · 3H2O | Tric. 1 : P1 |
5.CC.05 | Donnayite-(Y) | NaCaSr3Y(CO3)6 · 3H2O | Tric. 1 : P1 |
5.CC.05 | Mckelveyite-(Nd) | (Ba,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2O | Tric. |
5.CC.05 | Mckelveyite-(Y) | NaCaBa3Y(CO3)6 · 3H2O | Tric. 1 : P1 |
5.CC.05 | Weloganite | Na2Sr3Zr(CO3)6 · 3H2O | Tric. 1 : P1 |
5.CC.10 | Tengerite-(Y) | Y2(CO3)3 · 2-3H2O | Orth. mmm (2/m 2/m 2/m) : Pnnm |
5.CC.15 | Kimuraite-(Y) | Ca(Y,Nd)2(CO3)4 · 6H2O | Orth. |
5.CC.15 | Lokkaite-(Y) | Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O | Orth. |
5.CC.20 | Shomiokite-(Y) | Na3Y[CO3]3 · 3H2O | Orth. |
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. mmm (2/m 2/m 2/m) |
5.CC.25 | Lanthanite-(La) | (La,Ce)2(CO3)3 · 8H2O | Orth. |
5.CC.25 | Lanthanite-(Nd) | (Nd,La)2(CO3)3 · 8H2O | Orth. |
5.CC.30 | Adamsite-(Y) | NaY[CO3]2 · 6H2O | Tric. 1 : P1 |
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. |
Related Minerals - Hey's Chemical Index of Minerals Grouping
11.8.1 | Calkinsite-(Ce) | (Ce,La)2(CO3)3 · 4H2O | Orth. |
11.8.2 | Lanthanite-(La) | (La,Ce)2(CO3)3 · 8H2O | Orth. |
11.8.3 | Lanthanite-(Ce) | (Ce,La,Nd)2(CO3)3 · 8H2O | Orth. mmm (2/m 2/m 2/m) |
11.8.4 | Lanthanite-(Nd) | (Nd,La)2(CO3)3 · 8H2O | Orth. |
11.8.5 | Hydroxylbastnäsite-(Ce) | Ce(CO3)(OH) | Hex. 6 : P6 |
11.8.6 | Hydroxylbastnäsite-(Nd) | Nd(CO3)(OH) | Hex. |
11.8.7 | Hydroxylbastnäsite-(La) | (La,Nd,Ce)(CO3)(OH,F) | Hex. |
11.8.8 | Rémondite-(Ce) | Na3(Ce,Ca,Na)3(CO3)5 | Mon. 2 : P21 |
11.8.9 | Tengerite-(Y) | Y2(CO3)3 · 2-3H2O | Orth. mmm (2/m 2/m 2/m) : Pnnm |
11.8.10 | Kimuraite-(Y) | Ca(Y,Nd)2(CO3)4 · 6H2O | Orth. |
11.8.11 | Lokkaite-(Y) | Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O | Orth. |
11.8.12 | Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O | Mon. m : Pm |
11.8.13 | Calcioancylite-(Ce) | (Ce,Ca,Sr)CO3(OH,H2O) | Orth. mmm (2/m 2/m 2/m) |
11.8.14 | Burbankite | (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 | Hex. 6mm : P63mc |
11.8.15 | Khanneshite | (Na,Ca)3(Ba,Sr,Ce,Ca)3(CO3)5 | Hex. |
11.8.16 | Donnayite-(Y) | NaCaSr3Y(CO3)6 · 3H2O | Tric. 1 : P1 |
11.8.17 | Carbocernaite | (Ca,Na)(Sr,Ce,Ba)(CO3)2 | Orth. mm2 |
11.8.18 | Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O | Orth. mmm (2/m 2/m 2/m) |
11.8.20 | Mckelveyite-(Y) | NaCaBa3Y(CO3)6 · 3H2O | Tric. 1 : P1 |
11.8.21 | Sahamalite-(Ce) | (Mg,Fe)(Ce,La,Nd)2(CO3)4 | Mon. 2/m : P21/b |
Other Information
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 Ewaldite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Donnay, G., Donnay, J.D.H., Hey, M.H. (1971) Ewaldite, a new barium calcium carbonate. Part I. Tschermaks Mineralogische und Petrologische Mitteilungen: 15: 185-200.
Donnay, G., Preston, H. (1971) Ewaldite, a new barium calcium carbonate. Part II. Tschermaks Mineralogische und Petrologische Mitteilungen: 15: 201-212.
Fleischer, M. (1971) New mineral names. American Mineralogist: 56: 2156-2159.
Nickel, E.H., Mandarino, J.A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist: 72: 1031-1042.
Voloshin, A.V., Subbotin, V.V., Yakovenchuk, V.N., Pakhomoskiy, Ya.A., Men’shikov, Yu.P., Nadezhdina, T.N., Puscharovsky, D.Yu. (1992) New data on ewaldite. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 121(1): 56-57.
American Mineralogist 78 (1993) 110.
Jambor, J.L., Kovalenker, V.A., Roberts, A.C. (1995) New mineral names. American Mineralogist: 80: 630-635.
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(2): 225-250.
Internet Links for Ewaldite
mindat.org URL:
https://www.mindat.org/min-1429.html
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Localities for Ewaldite
Locality List




All localities listed without proper references should be considered as questionable.
Canada | |
| MCDONALD, A.M. (1989) Ewaldite, a possible member of the weloganite group, and UK62, a new sodium calcium fluorocarbonate from Mont Saint-Hilaire, Quebec. M.Sc. Thesis, Ottawa-Carleton Geoscience Centre, Ottawa, Canada. 78 pages.; GRICE, J.D. (1989) Mont Saint-Hilaire, Quebec: Canada's Most Diverse Mineral Locality. In: Famous mineral localities of Canada. Published by Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences, 190 pages: 100-108; 166-175.; HORVÁTH, L., GAULT, R.A. (1990) The mineralogy of Mont Saint-Hilaire. Mineralogical Record, 21, 281-359. |
| Nadeau, O., Stevenson, R. and Jébrak, M. (2014) The geology, petrology and geochemistry of the Montviel alkaline-carbonatite hosted lanthanide-Nb ore deposit, Abitibi, Canada. Abstract with Program, GAC/MAC Annual meeting 2014. 1p. |
Greenland | |
| Petersen, O.V., Balić-Žunić, T.; Gault, R. A.; Andersen, T. (2003) The first occurrence of ewaldite and donnayite-(Y), two rare carbonate minerals, in the Narssârssuk pegmatite, South Greenland. Neues Jahrbuch für Mineralogie - Monatshefte. 12: 543-555 |
Russia | |
| [World of Stones 95:5-6, p64]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow |
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. | |
| New Data on Minerals (2004): 39: 50-64 |
UK | |
| National Museum of Wales Database.; Wight, Q. (2006) Micromounting. Mineralogical Record 37 (4), p.320.; Hubbard, N., Green, D.I., and Tindle, A.G. (2008) Barium Zeolites and Calcioancylite-(Ce) From Guisachan Quarry, Tomich, Highland, Scotland. Journal of the Russell Society, vol. 11, 73-79. Cotterell, T.F. et al. (2011) The mineralogy of Dolyhir quarry, Old Radnor, Powys, Wales. UK Journal of Mines & Minerals, vol. 32, 5-61. |
USA (TL) | |
| American Mineralogist: 56: 2156. |
Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada