Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-23T10:25:43.540Z Has data issue: false hasContentIssue false
  • English
  • Français

Differential Scanning Calorimetry of Minerals of the Dolomite-Ferroan-Dolomite-Ankerite Series in Flowing Carbon Dioxide

Published online by Cambridge University Press:  05 July 2018

J. V. Dubrawski  and
S. St. J. Warne
J. V. Dubrawski
Affiliation:
BHP Central Research Laboratories, PO Box 188, Wallsend, NSW 2287, Australia
S. St. J. Warne
Affiliation:
Department of Geology, University of Newcastle, Shortland, NSW 2308, Australia
Get access Rights & Permissions [Opens in a new window]

Abstract

The dolomite-ferroan-dolomite-ankerite series of carbonate minerals has been investigated in flowing carbon dioxide using high-temperature DSC. Decomposition products were analysed by X-ray diffraction. The minerals studied included dolomite containing no iron, and members substituted by iron in the molar ratio range of 0.082 to 0.49. Complete resolution of the three main endothermic features was observed and enthalpy values ΔH, determined from each. The individual and total enthalpy values showed a linear dependence upon the Fe and Mg content of the members across the series. A decrease in the enthalpy of decomposition occurs with increasing Fe content. The effect of Fe substitution was readily observed and the estimated limit of detection is less than 1% FeO. Accuracy of the measurements was limited by the purity of the minerals themselves.

Keywords

dolomiteferroan dolomiteankeritedifferential scanning calorimetryX-ray diffractioncarbon dioxide
Type
Mineralogy
Information
Mineralogical Magazine , Volume 52 , Issue 368 , December 1988 , pp. 627 - 635
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bandi, W.R. and Krapf, G. (1976) The effect of CO2 pressure and alkali salt on the mechanisms of decomposition of dolomite. Thermochim. Ada, 14, 221-43.Google Scholar
Beck, C.W. (1950) Differential thermal analysis curves of carbonate minerals. Am. Mineral. 35, 985.Google Scholar
Breuer, K.H. and Eysel, W. (1982) The calorimetric calibration of differential scanning calorimetry cells. Thermochim. Ada, 57, 317-29.Google Scholar
Dubrawski, J.V. and Warne, S. St. J. (1986) Calibration of differential scanning calorimetry units for mineralogical studies. Ibid. 104, 77-83.Google Scholar
Dubrawski, J.V. and Warne, S. St. J. (1987) The use of differential scanning calorimetry in measuring the thermal decomposition of mineral carbonates occurring in coal. Fuel, 66, 173-3. 6.Google Scholar
Earnest, C.M. (1984) Thermal analysis of clays, minerals and coal. Perkin-Elmer Corp., Norwalk, USA, 16 pp.Google Scholar
Guttman, C.M. and Flynn, J.H. (1973) On the drawing of the base line for differential scanning calorimetric calculation of heats of transition. Anal. Chem. 45, 408-10.Google Scholar
Haul, R.A.W. and Heystek, H. (1952) Differential thermal analysis of the dolomite decomposition. Am. Mineral. 37, 166-79.Google Scholar
Haul, R.A.W. and Heystek, H. and Wilsdorf, H. (1952) Rontgenographische untersuchung der thermischen zersetzung von dolomitkristallen. Acta Crystallogr. 5, 250-5.Google Scholar
Haul, R.A.W. and Heystek, H. and Wilsdorf, H. Stein, L.H., and Louw, J.D. (1951) Exchange of carbon-13. dioxide between solid carbonates and gaseous carbon dioxide. Nature (London) 167, 241.Google Scholar
Iwafuchi, K., Watanabe, C., and Otsuka, R. (1983) Thermal decomposition of ferromanganoan dolomite. Thermochim. Acta, 66, 105-25.Google Scholar
Kulp, J.L., Kent, P., and Kerr, P.F. (1951) Thermal study of the CaMgFe carbonate minerals. Am. Mineral. 36, 643-70.Google Scholar
Milodowski, A.E. and Morgan, D.J. (1981) Thermal decomposition of minerals of the dolomite-ferroan dolomite- ankerite series in a carbon dioxide atmosphere. Proc. 2nd ESTA Conference. Aberdeen, Scotland, pp. 468-71.Google Scholar
O'Neill, M.J. (1966) Measurement of specific heat functions by differential scanning calorimetry. Anal. Chem. 38, 10, 133-16.Google Scholar
Otsuka, R. (1986) Recent studies in the decomposition of the dolomite group by thermal analysis. Thermochim. Acta, 100, 698-0.Google Scholar
Reddick, K.L. (1968) Heats of reaction for carbonate mineral decomposition. Anal. Calorimetry, Proc. Amer. Chem. Soc. Symp., 155th, 297-303. Edited by Porter, R.S., Plenum Press, New York.CrossRefGoogle Scholar
Robie, R.A., Hemingway, B.S., and Fisher, J.R. (1979) Thermodynamic properties of minerals and related substances at 298.15 K and 1 bar pressure and at higher temperatures. Geological Survey Bulletin 1452 US Government Printing Office, Washington.Google Scholar
Smith, J.W. (1972) Thermal analysis in earth science: experience and expectations. Thermal Analysis V. III (Proc. 3rd ICTA) Birkhauser Verlag, Basel, 605-35.CrossRefGoogle Scholar
Smykatz-Kloss, W. (1964) Differential thermo-analyse von einigen karbonat-mineralen. Beitr. Mineral. Petrogr., 9, 481-502.Google Scholar
Stadler, H.A. (1964) Petrographische und mineralogische untersuchungen im Grimselgebiet. Schweiz. Mineral. Petrogr. Mitt., 44, 187-399.Google Scholar
Todor, D.N. (1976) The thermal analysis of minerals. Abacus Press, Tunbridge Wells, UK, 256 pp.Google Scholar
Warne, S. St. J. and Dubrawski, J.V. (1987) Differential scanning calorimetry of the dolomiteankerite mineral series in flowing nitrogen. Thermochim. Acta, 121, 39.Google Scholar
Warne, S. St. J. and Dubrawski, J.V. Morgan, D.J., and Milodowski, A.E. (1981) Thermal analysis studies of the dolomite, ferroan dolomite, ankerite series. Part 1. Iron content recognition and determination by variable atmosphere DTA. Ibid. 51, 105-11.Google Scholar