| Abstract: | The heat capacities, C0P, of synthetic rhodonite and braunite have been measured by adiabatic calorimetry from 6 to ~350 K. The heat capacity of braunite was also measured to ~900 K by differential scanning calorimetry. Brunite exhibits a ??-peak in C0P in the temperature region 93.4-94.2 K. Rhodonite did not show the expected peak in C0P characteristic of the co-operative ordering of the Mn2+ spins at temperatures above 6 K. A revised petrogenetic grid for the system Mn-Si-O-C at 2000 bars is presented and is consistent with both thermochemical values and occurrence of natural assemblages. -from Authors |
| Genre: | Article |
| ProdID: | 70019145 |
| Citation Author: | Robie, R. A.; Huebner, J. S.; Hemingway, B. S. |
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| Citation End Page: | 575 |
| Citation Issue: | 5-6 |
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| Citation Language: | English |
| Citation Larger Work Title: | American Mineralogist |
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| Citation Number Of Pages: | 16 |
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| Citation Search Results Text: | Heat capacities and thermodynamic properties of braunite (Mn7 SiO12) and rhodonite (MnSiO3); 1995; Article; Journal; American Mineralogist; Robie, R. A.; Huebner, J. S.; Hemingway, B. S. |
| Citation Start Page: | 560 |
| Citation Volume: | 80 |
| Citation Year: | 1995 |
| Type: | citation/reference |
| Text: | Heat capacities and thermodynamic properties of braunite (Mn7 SiO12) and rhodonite (MnSiO3); 1995; Article; Journal; American Mineralogist; Robie, R. A.; Huebner, J. S.; Hemingway, B. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1995 00:00 -0600 |
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