| Reference Type | Journal (article/letter/editorial) |
|---|
| Title | Crystal structure of KBSi3O8 isostructural with danburite |
|---|
| Journal | Mineralogical Magazine | ISSN | 0026-461X |
|---|
| Authors | Kimata, Mitsuyoshi | Author |
|---|
| Year | 1993 (March) | Volume | 57 |
|---|
| Issue | 386 |
|---|
| Publisher | Mineralogical Society |
|---|
| Download URL | https://rruff.info/doclib/MinMag/Volume_57/57-386-157.pdf+ |
|---|
| DOI | doi:10.1180/minmag.1993.057.386.15Search in ResearchGate |
|---|
| Generate Citation Formats |
|---|
| Mindat Ref. ID | 1897 | Long-form Identifier | mindat:1:5:1897:9 |
|---|
|
| GUID | 0 |
|---|
| Full Reference | Kimata, Mitsuyoshi (1993) Crystal structure of KBSi3O8 isostructural with danburite. Mineralogical Magazine, 57 (386) 157-164 doi:10.1180/minmag.1993.057.386.15 |
|---|
| Plain Text | Kimata, Mitsuyoshi (1993) Crystal structure of KBSi3O8 isostructural with danburite. Mineralogical Magazine, 57 (386) 157-164 doi:10.1180/minmag.1993.057.386.15 |
|---|
| In | (1993, March) Mineralogical Magazine Vol. 57 (386) Mineralogical Society |
|---|
| Abstract/Notes | AbstractThe crystal structure of KBSi3O8 (orthorhombic, Pnam, with a = 8.683(1), b = 9.253(1), c = 8.272(1) Ă…,, V = 664.4(1) Ă…3, Z = 4) has been determined by the direct method applied to 3- dimensional rcflection data. The structure of a microcrystal with the dimensions 20 Ă— 29 Ă— 37 ÎĽm was refined to an unweightcd residual of R = 0.031 using 386 non-zero structure amplitudes. KBSi3O8 adopts a structure essentially different from recdmergneritc NaBSi3O8, with the low albite (NaAlSi3O8) structure, and isotypic with danburite CaB2Si2Os which has the same topology as paracelsian BaAl2Si2O8. The chenfical relationship between this sample and danburitc gives insight into a new coupled substitution; K+ + Si4+ = Ca2+ + B3+ in the extraframework and tetrahedral sites. The present occupancy refinement revealed partial disordering of B and Si atoms which jointly reside in two kinds of general equivalent points, T(1) and T(2) sites. Thus the expanded crystal-chemical formula can be written in the form K(B0.44Si0.56)2(B0.06Si0.94)2O8The systematic trend among crystalline compounds with the M+T3+T4+3O8 formula suggests that they exist in one of four structural types; the feldspar structures with T3+/T4+ ordered and/or disordered forms, and the paracelsian and the hollandite structures. |
|---|
These are possibly similar items as determined by title/reference text matching only.
