Calorimetric studies of the energetics of order-disorder in the system Mg1-xFexCa(CO3)2

Alexandra Navrotsky; Debra Dooley; Richard Reeder; Patrick Brady

doi:10.2138/am-1999-1016

Calorimetric studies of the energetics of order-disorder in the system Mg_1-xFe_xCa(CO₃)₂

Alexandra Navrotsky
, Debra Dooley
, Richard Reeder
, Patrick Brady

VP for Brookhaven Affairs

University of California at Davis
Piedmont College

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

Calorimetric studies by Chai and Navrotsky (1996) on dolomite-ankerite energetics have been extended by including two additional types of samples: a very disordered stoichiometric MgCa(CO₃)₂ prepared from low-temperature aqueous solution and three largely ordered natural samples of intermediate iron content. Combining these data with previous work, we see three distinct energetic trends. These represent samples with nearly complete order, nearly complete disorder, and intermediate order. From these trends, the enthalpy of complete disordering is estimated to be 33 ±6 kJ/mol for MgCa(CO₃)₂ and 18 + 5 kJ/mol for FeCa(CO₃)₂.

Original language	English
Pages (from-to)	1622-1626
Number of pages	5
Journal	American Mineralogist
Volume	84
Issue number	10
DOIs	https://doi.org/10.2138/am-1999-1016
State	Published - 1999

Access to Document

10.2138/am-1999-1016

Cite this

@article{2c5022b8a53d4986be1fb64a97b04667,

title = "Calorimetric studies of the energetics of order-disorder in the system Mg1-xFexCa(CO3)2",

abstract = "Calorimetric studies by Chai and Navrotsky (1996) on dolomite-ankerite energetics have been extended by including two additional types of samples: a very disordered stoichiometric MgCa(CO3)2 prepared from low-temperature aqueous solution and three largely ordered natural samples of intermediate iron content. Combining these data with previous work, we see three distinct energetic trends. These represent samples with nearly complete order, nearly complete disorder, and intermediate order. From these trends, the enthalpy of complete disordering is estimated to be 33 ±6 kJ/mol for MgCa(CO3)2 and 18 + 5 kJ/mol for FeCa(CO3)2.",

author = "Alexandra Navrotsky and Debra Dooley and Richard Reeder and Patrick Brady",

year = "1999",

doi = "10.2138/am-1999-1016",

language = "English",

volume = "84",

pages = "1622--1626",

journal = "American Mineralogist",

issn = "0003-004X",

number = "10",

}

TY - JOUR

T1 - Calorimetric studies of the energetics of order-disorder in the system Mg1-xFexCa(CO3)2

AU - Navrotsky, Alexandra

AU - Dooley, Debra

AU - Reeder, Richard

AU - Brady, Patrick

PY - 1999

Y1 - 1999

N2 - Calorimetric studies by Chai and Navrotsky (1996) on dolomite-ankerite energetics have been extended by including two additional types of samples: a very disordered stoichiometric MgCa(CO3)2 prepared from low-temperature aqueous solution and three largely ordered natural samples of intermediate iron content. Combining these data with previous work, we see three distinct energetic trends. These represent samples with nearly complete order, nearly complete disorder, and intermediate order. From these trends, the enthalpy of complete disordering is estimated to be 33 ±6 kJ/mol for MgCa(CO3)2 and 18 + 5 kJ/mol for FeCa(CO3)2.

AB - Calorimetric studies by Chai and Navrotsky (1996) on dolomite-ankerite energetics have been extended by including two additional types of samples: a very disordered stoichiometric MgCa(CO3)2 prepared from low-temperature aqueous solution and three largely ordered natural samples of intermediate iron content. Combining these data with previous work, we see three distinct energetic trends. These represent samples with nearly complete order, nearly complete disorder, and intermediate order. From these trends, the enthalpy of complete disordering is estimated to be 33 ±6 kJ/mol for MgCa(CO3)2 and 18 + 5 kJ/mol for FeCa(CO3)2.

UR - https://www.scopus.com/pages/publications/0033373589

U2 - 10.2138/am-1999-1016

DO - 10.2138/am-1999-1016

M3 - Article

AN - SCOPUS:0033373589

SN - 0003-004X

VL - 84

SP - 1622

EP - 1626

JO - American Mineralogist

JF - American Mineralogist

IS - 10

ER -

Calorimetric studies of the energetics of order-disorder in the system Mg_1-xFe_xCa(CO₃)₂

Abstract

Access to Document

Other files and links

Fingerprint

Cite this