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Ewaldite

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Paul Peter Ewald
Formula:
Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O
Colour:
Bluish green, pale greenish gray
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.
This page provides mineralogical data about Ewaldite.


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Classification of EwalditeHide

Approved
Approval Year:
1969
First Published:
1971
Approval History:
IMA1969-013
5.CC.05

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
11.8.19

11 : Carbonates
8 : Carbonates of the rare earths

Physical Properties of EwalditeHide

Transparency:
Translucent
Colour:
Bluish green, pale greenish gray

Optical Data of EwalditeHide

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.
Surface Relief:
Moderate

Chemical Properties of EwalditeHide

Formula:
Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O
Common Impurities:
TR,La,Pr,Nd,Gd,Tb,Dy

Crystallography of EwalditeHide

Crystal System:
Hexagonal
Class (H-M):
6mm - Dihexagonal Pyramidal
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)

Type Occurrence of EwalditeHide

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.
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 EwalditeHide

Other Language Names for EwalditeHide

German:Ewaldit
Spanish:Ewaldita

Relationship of Ewaldite to other SpeciesHide

Member of:
Other Members of this group:
Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2OTric. 1 : P1
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)31 photos of Ewaldite associated with Donnayite-(Y) on mindat.org.
Harmotome1 photo of Ewaldite associated with Harmotome on mindat.org.
Pyrite1 photo of Ewaldite associated with Pyrite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.CC.05Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
5.CC.05Mckelveyite-(Nd)(Ba,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2OTric.
5.CC.05Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2OTric. 1 : P1
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 - 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)
11.8.20Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2OTric. 1 : P1
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 EwalditeHide

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 EwalditeHide

Localities for EwalditeHide

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.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
McDONALD, A.M. (1989) Ewaldite, a possible member of the weloganite group, and UK62, a new sodium, calcium fluocarbonate From Mont Saint Hilaire, Quebec. M.Sc. Thesis, Ottawa Carleton Geoscience Centre, Ottawa, Canada. 78 p. HORVÁTH, L., and GAULT, R.A. (1990) The mineralogy of Mont Saint-Hilaire. Mineralogical Record, 21, 284-359.
    • Nord-du-Québec
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
 
  • Kujalleq
    • Narsaq
      • Igaliku (Igaliko)
        • Narsaarsuk Plateau
Petersen et al. (2003): N. Jb. Miner. Mh. 12: 543-555
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
        • Kukisvumchorr Mt
[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.
      • Northern Karelia
New Data on Minerals (2004): 39: 50-64
UK
 
  • Wales
    • Powys
      • Old Radnor
        • Wethel
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)
 
  • Wyoming
    • Sweetwater Co.
      • Green River Formation
American Mineralogist: 56: 2156.
Mineral and/or Locality  
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