| Reference Type | Journal (article/letter/editorial) |
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| Title | The thermal expansion of monticellite and olivine |
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| Journal | European Journal of Mineralogy |
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| Authors | Hovis, G. | Author |
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| Tribaudino, M. | Author |
| Year | 2025 | Volume | < 37 > |
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| Page(s) | 181-190 | Issue | < 2 > |
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| URL | |
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| DOI | doi:10.5194/ejm-37-181-2025Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 18166138 | Long-form Identifier | mindat:1:5:18166138:4 |
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| GUID | 0 |
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| Full Reference | Hovis, G., Tribaudino, M. (2025) The thermal expansion of monticellite and olivine. European Journal of Mineralogy, 37 (2). 181-190 doi:10.5194/ejm-37-181-2025 |
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| Plain Text | Hovis, G., Tribaudino, M. (2025) The thermal expansion of monticellite and olivine. European Journal of Mineralogy, 37 (2). 181-190 doi:10.5194/ejm-37-181-2025 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | The thermal expansion of two natural monticellite (CaMgSiO4) samples was measured by X-ray powder diffraction between 298 and 1250 K. Axial expansion in monticellite is anisotropic with α(c) > α(b) ≥α(a), with the volume expansion nearly equivalent to that of synthetic forsterite as measured in the same laboratory, although forsterite axes expand as α(b) > α(c) > α(a). Kroll physical and Fei empirical models have been used to describe the volume and axial thermal expansion of both minerals. High-temperature structural data for these minerals show that the Ca-occupied M2 polyhedron in monticellite expands less than the Mg-occupied site in forsterite, resulting in comparatively lower expansion along the b crystallographic axis. But greater expansion of the M1 polyhedron in monticellite accounts for greater expansion along its c axis and, in turn, the nearly equivalent volume expansion relative to that of forsterite. |
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