| Reference Type | Journal (article/letter/editorial) |
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| Title | The structure type of heulandite B (heat-collapsed phase) |
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| Journal | TMPM Tschermaks Mineralogische und Petrographische Mitteilungen |
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| Authors | Alberti, A. | Author |
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| Year | 1973 | Volume | 19 |
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| Page(s) | 173-184 | Issue | 3 |
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| Publisher | Springer Science and Business Media LLC |
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| DOI | doi:10.1007/bf01167426Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 7741448 | Long-form Identifier | mindat:1:5:7741448:5 |
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| GUID | 0 |
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| Full Reference | Alberti, A. (1973) The structure type of heulandite B (heat-collapsed phase). TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 19 (3). 173-184 doi:10.1007/bf01167426 |
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| Plain Text | Alberti, A. (1973) The structure type of heulandite B (heat-collapsed phase). TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 19 (3). 173-184 doi:10.1007/bf01167426 |
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| In | (1973) TMPM Tschermaks Mineralogische und Petrographische Mitteilungen Vol. 19 (3) Springer Science and Business Media LLC |
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| Abstract/Notes | If heulandite is heated to 300–400°C for at least 12 hours it is transformed to heulandite B, the ideal composition of which is (Ca, Na2)Al2Si7O18·2H2O. Heulandite B crystallizes monoclinic,C2/m being the most probable space group; lattice constants:a=16.95,b=16.42,c=7.28 Å, β=117°47′;Z=4. The most important alteration that heulandite undergoes during the change of phase is a rotation of its fundamental polyhedral unit (formed of 4- and 5-membered tetrahedral rings). As a result of this rotation the geometrical shape of the two kinds of channels parallel toc is changed considerably; their section, which in the low-temperature phase is practically circular, becomes markedly elliptical, with the major axis of the ellipse parallel to [102] for the larger channels, and parallel tob for the smaller channels. |
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