| Reference Type | Journal (article/letter/editorial) |
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| Title | Vaterite from Ballycraigy, Larne, Northern Ireland |
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| Journal | Mineralogical Magazine and Journal of the Mineralogical Society |
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| Authors | McConnell, J. D. C. | Author |
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| Year | 1960 (September) | Volume | 32 |
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| Issue | 250 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_32/32-250-535.pdf+ |
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| DOI | doi:10.1180/minmag.1960.032.250.03 |
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| Generate Citation Formats |
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| Mindat Ref. ID | 5574 | Long-form Identifier | mindat:1:5:5574:5 |
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| GUID | 0 |
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| Full Reference | McConnell, J. D. C. (1960) Vaterite from Ballycraigy, Larne, Northern Ireland. Mineralogical Magazine and Journal of the Mineralogical Society, 32 (250) 535-544 doi:10.1180/minmag.1960.032.250.03 |
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| Plain Text | McConnell, J. D. C. (1960) Vaterite from Ballycraigy, Larne, Northern Ireland. Mineralogical Magazine and Journal of the Mineralogical Society, 32 (250) 535-544 doi:10.1180/minmag.1960.032.250.03 |
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| In | (1959) Mineralogical Magazine Vol. 32 (250) Mineralogical Society |
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| Abstract/Notes | SummaryVaterite, the third unstable polymorph of CaCO3, is recognized by optical and X-ray powder techniques as a major constituent in a carbonated calcium silicate hydrogel complex formed from larnite at Ballycraigy, Lame, Northern Ireland. Re-indexed X-ray powder data obtained on synthetic vaterite are provided indicating a hexagonal unit cell with dimensions a = 7·135 Å. and c = 8·524 Å., Z = 6CaCO3. The re-indexing is endorsed by the results of electron diffraction study of synthetic vaterite. Vaterite is shown to correspond to the hypothetical CaCO3 member of the bastnäsite-synchisite mineral series on the basis of extrapolated cell dimensions and optical properties. A structural scheme for vaterite is proposed in which Ca layers replace the CeF layers in bastnäsite, and near-vertical CO3 groups are present. The stability relations of natural vaterite are discussed and comment made on the recent observation of vaterite, in a like environment, in carbonated cements and mortars. |
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