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April 1, 1993Acta Crystallographica Section B Structural Science

The modulated structure of synthetic Co-åkermanite, Ca2CoSi2O7

Kenji Hagiya M. Ohmasa Kazuake Iishi

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Abstract

Diffraction patterns of synthetic Co-akermanite, Ca 2 CoSi 2 O 7 , reveal distinct satellite reflections at room temperature. An incommensurate modulation in this material has been determined by five-dimensional refinement pf the structure. The basic structure is tetragonal P42 1 m, unit-cell dimensions a=7.8417 (6), c=5.0249 (3) A, V=308.99 A 3 , Z=2, M r =307.26, D m =3.307 (4) g cm -3 at 293 K, D x =3.302 g cm -3 , Mo Kα with graphite monochromator, μ=47.7 cm -1 , F(000)=302, R=0.049 for 734 unique reflections

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Hagiya et al. (1993) studied this question.

synapsesocial.com/papers/6ab08fb27e0fb9268a25d48b https://doi.org/10.1107/s0108768192008048

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