| Reference Type | Journal (article/letter/editorial) |
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| Title | K2.9Rb0.1ErSi3O9: a novel, non-centrosymmetric chain silicate and its crystal structure |
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| Journal | Mineralogical Magazine |
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| Authors | Wierzbicka-Wieczorek, M. | Author |
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| Kolitsch, U. | Author |
| Nasdala, L. | Author |
| Tillmanns, E. | Author |
| Year | 2010 (December) | Volume | 74 |
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| Issue | 6 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/minmag.2010.074.6.979Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 244124 | Long-form Identifier | mindat:1:5:244124:9 |
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| GUID | 0 |
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| Full Reference | Wierzbicka-Wieczorek, M., Kolitsch, U., Nasdala, L., Tillmanns, E. (2010) K2.9Rb0.1ErSi3O9: a novel, non-centrosymmetric chain silicate and its crystal structure. Mineralogical Magazine, 74 (6) 979-990 doi:10.1180/minmag.2010.074.6.979 |
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| Plain Text | Wierzbicka-Wieczorek, M., Kolitsch, U., Nasdala, L., Tillmanns, E. (2010) K2.9Rb0.1ErSi3O9: a novel, non-centrosymmetric chain silicate and its crystal structure. Mineralogical Magazine, 74 (6) 979-990 doi:10.1180/minmag.2010.074.6.979 |
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| Abstract/Notes | AbstractThe new, non-centrosymmetric chain silicate, K2.9Rb0.1ErSi3O9, was prepared by a high-temperature flux-growth technique, and its crystal structure was determined from single-crystal X-ray intensity data (Mo-Kα, 293 K) in space P1, with a = 6.672(1), b = 6.719(1), c = 6.725(1) Å, α = 108.87(3), β = 106.72(3), γ = 107.61(3)°, V = 245.82(6) Å3, Z = 1, R(F) = 2.81%. The compound represents a novel structure type. K2.9Rb0.1ErSi3O9 is characterized by a mixed octahedral-tetrahedral framework, in which each corner of the isolated ErO6 octahedron (<Er—O> = 2.26 Å) is linked to infinite [Si3O9] chains extending approximately along [111]. This connectivity results in a microporous character with two different, narrow channels that extend parallel to [111] and [100] and host K+ cations. The atomic arrangement is strongly pseudorhombohedral. A single-crystal Raman spectrum of K2.9Rb0.1ErSi3O9 is in agreement with the low space-group symmetry. Relations to minerals and synthetic compounds based on [Si3O9] chains are discussed, revealing that the geometry of the chain in K2.9Rb0.1ErSi3O9 is similar to that in pectolite, NaCa2[HSi3O9]. |
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