Ewaldite (original) (raw)

A valid IMA mineral species

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About EwalditeHide

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Formula:

Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O

Colour:

Bluish green, pale greenish gray

Specific Gravity:

3.25 - 5

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.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:1429:4

73e0993b-0a58-4626-883a-f851c7c12169

IMA Classification of EwalditeHide

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Approval history:

IMA1969-013

Type description reference:

Classification of EwalditeHide

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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

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol Source Reference
Ew IMA–CNMNC Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of EwalditeHide

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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 EwalditeHide

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RI values:

_n_ω = 1.646 _n_ε = 1.572

δ = 0.074

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

O = dark bluish green; E = pale yellowish green

Chemistry of EwalditeHide

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Mindat Formula:

Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O

Common Impurities:

TR,La,Pr,Nd,Gd,Tb,Dy

Crystallography of EwalditeHide

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Class (H-M):

6_m_ m - Dihexagonal Pyramidal

Cell Parameters:

a = 5.31 Å, c = 12.83 Å

Unit Cell V:

313.29 ų (Calculated from Unit Cell)

Crystal StructureHide

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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

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

d-spacing Intensity
3.135 Å (100)
2.044 Å (90)
2.024 Å (90)
2.655 Å (80)
2.626 Å (80)
4.340 Å (70)
1.609 Å (60)

Comments:

Vuoriyarvi complex, Kola Peninsula, Russia. Data from Voloshin et al. (1992).

Geological EnvironmentHide

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Type Occurrence of EwalditeHide

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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

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Other Language Names for EwalditeHide

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Relationship of Ewaldite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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5.CC. Alicewilsonite-(YCe) Na2Sr2YCe(CO3)6 · 3H2O Tric. 1 : _P_1
5.CC. Yuchuanite-(Y) Y2(CO3)3 · H2O Tric. 1 : _P_1
5.CC. Bainbridgeite-(NdCe) Na2Ba2NdCe(CO3)6 · 3H2O Tric. 1 : _P_1
5.CC.05 Donnayite-(Y) NaCaSr3Y(CO3)6 · 3H2O Tric. 1 : _P_1
5.CC.05 Mckelveyite-(Nd) NaCaBa3Nd(CO3)6 · 3H2O Mon. m : B b
5.CC.05 Mckelveyite-(Y) NaCaBa3Y(CO3)6 · 3H2O Tric. 1 : _P_1
5.CC.05 Weloganite Na2Sr3Zr(CO3)6 · 3H2O Tric. 1 : _P_1
5.CC.05 Unnamed (MSH UK-37A) Sr3NaCaY(CO3)6 · 3H2O Hex. 6_m_ m : P_63_m c
5.CC.05 UM1992-05-CO:CaCeLaNaSr (Sr,Na,Y,REE,Ca,Ba)2(CO3)2 · H2O Trig. 3_m_ : R_3_m
5.CC.05 Mckelveyite Group A3B3(CO3)6 · 3H2O
5.CC.05 Bainbridgeite-(YCe) Na2Ba2YCe(CO3)6 · 3H2O Tric. 1 : _P_1
5.CC.05 Alicewilsonite-(YLa) Na2Sr2YLa(CO3)6 · 3H2O Tric. 1 : _P_1
5.CC.10 Tengerite-(Y) Y2(CO3)3 · 2-3H2O Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
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.15 Hizenite-(Y) Ca2Y6(CO3)11 · 14H2O Orth.
5.CC.20 Shomiokite-(Y) Na3Y[CO3]3 · 3H2O Orth. m _m_2
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. m m m _(_2/_m_2/_m_2/m )
5.CC.25 Lanthanite-(La) (La,Ce)2(CO3)3 · 8H2O Orth. m m m _(_2/_m_2/_m_2/m )
5.CC.25 Lanthanite-(Nd) (Nd,La)2(CO3)3 · 8H2O Orth. m m m _(_2/_m_2/_m_2/m )
5.CC.30 Adamsite-(Y) NaY[CO3]2 · 6H2O Tric. 1 : _P_1
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. 1 : _P_1
5.CC.45 Lecoqite-(Y) Na3Y(CO3)3 · 6H2O Hex. 6 : _P_63

Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

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References for EwalditeHide

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Reference List:

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.

Localities for EwalditeHide

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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

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Canada
Québec Montérégie La Vallée-du-Richelieu RCM Mont Saint-Hilaire ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH) MCDONALD (1989) +2 other references
Nord-du-Québec Jamésie ⓘ Montviel carbonatite complex Nadeau et al. (2014)
Greenland
Kujalleq Igaliku Narsaarsuk Plateau ⓘ Narssârssuk pegmatite Petersen et al. (2003)
Russia
Murmansk Oblast Khibiny Massif Kukisvumchorr Mt ⓘ Kirovskii apatite mine [World of Stones 95:5-6 +1 other reference
ⓘ The Carbonatite Stock in the vicinity of Tul'ilukht Bay Zaitsev et al. (1996) +3 other references
Northern Karelia ⓘ Vuoriyarvi alkaline-ultrabasic massif Belovitskaya et al. (2004)
UK
Wales Powys Old Radnor ⓘ Dolyhir Quarry National Museum of Wales database +3 other references
USA
ⓘ Green River Formation Wayne C. Shanks et al. (2012)
Wyoming Sweetwater County ⓘ Diamond Alkali Daco No. 3 (TL) Donnay et al. (1971) +2 other references