Standard molar enthalpies of formation of hydroxy-, chlor-, and bromapatite

被引：27

作者：

Cruz, FJAL

da Piedade, ME

Calado, JCG

机构：

[1] Inst Super Tecn, Ctr Quim Estrutural, P-1049001 Lisbon, Portugal

[2] Univ Lisbon, Fac Ciencias, Dept Quim & Bioquim, P-1749016 Lisbon, Portugal

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2005年 / 37卷 / 10期

关键词：

apatites; hydroxyapatite; chlorapatite; bromapatite; enthalpy of formation; thermochemistry;

D O I：

10.1016/j.jct.2005.01.010

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The standard (p degrees = 0.1 MPa) molar enthalpies of formation in the crystalline state of hydroxyapatite, chlorapatite and a preliminary value for bromapatite, at T = 298.15 K, were determined by reaction-solution calorimetry as: Delta(f)H(m)degrees[Ca-10(PO4)(6)Br-2, cr] = (OH)(2), cr] = -(13399 +/- 11) kJ(.)mol(-1), Delta(f)H(m)degrees[Ca-10(PO4)(6)Cl-2, cr] = -(13231 +/- 82) kJ(.)mol(-1), and Delta(f)H(m)degrees[Ca-10(PO4)(6)Br-2, cr] = -(13063 +/- 81) kJ(.)mol(-1). A critical assessment of these results and of previously published data is made. Finally, the standard molar enthalpy of formation of iodapatite is estimated as Delta(f)H(m)degrees[Ca-10(PO4)(6)I-2, cr] = -12949 kJ(.)mol(-1), from a linear correlation of Delta(f)H(m)degrees[Ca-10(PO4)(6)X-2, cr] (X = OH, F, Cl, Br) against the corresponding Delta(f)H(m)degrees[CaX2, cr]. (c) 2005 Elsevier Ltd. All rights reserved.

引用

收藏

页码：1061 / 1070

页数：10

相关论文

共 50 条

[41] Standard molar enthalpy of formation of rubidium diphosphate [J].

Khaled, H. Gmati-Ben ;

Khattech, I. ;

Jemal, M. .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2014, 118 (01) :579-583

[42] Standard molar enthalpy of formation of rubidium diphosphate [J].

H. Gmati-Ben Khaled ;

I. Khattech ;

M. Jemal .

Journal of Thermal Analysis and Calorimetry, 2014, 118 :579-583

[43] Thermochemistry of alcohols: Experimental standard molar enthalpies of formation and strain of some alkyl and phenyl congested alcohols [J].

Verevkin, SP .

STRUCTURAL CHEMISTRY, 1998, 9 (05) :375-382

[44] Determination of Standard Molar Enthalpies of Formation for "White Powdery Tungstic Acid" and for Dodecatungstophosphoric Acid by Solution Calorimetry [J].

WANG Ai-ming CAI Xian-e ZHU Jing Gu Yi-dong(Department of Chemistry .

Chemical Research in Chinese Universities, 1993, (01) :13-17

[45] Standard molar enthalpies of formation for crystalline vanillic acid, methyl vanillate and acetovanillone by bomb calorimetry method [J].

Maksimuk, Yuri ;

Antonava, Zoya ;

Ponomarev, Dmitry ;

Sushkova, Alesia .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2018, 134 (03) :2127-2136

[46] Standard molar enthalpies of formation for crystalline vanillic acid, methyl vanillate and acetovanillone by bomb calorimetry method [J].

Yuri Maksimuk ;

Zoya Antonava ;

Dmitry Ponomarev ;

Alesia Sushkova .

Journal of Thermal Analysis and Calorimetry, 2018, 134 :2127-2136

[47] Thermochemistry of Alcohols: Experimental Standard Molar Enthalpies of Formation and Strain of Some Alkyl and Phenyl Congested Alcohols [J].

Sergey P. Verevkin .

Structural Chemistry, 1998, 9 :375-382

[48] Standard enthalpies of formation of Li, Na, K, and Cs thiolates [J].

Leal, Joao P. .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2010, 100 (02) :441-446

[49] Standard enthalpies of formation of Li, Na, K, and Cs thiolates [J].

João P. Leal .

Journal of Thermal Analysis and Calorimetry, 2010, 100 :441-446

[50] Revision of standard molar enthalpies of formation of glycine and L-alanine in the gaseous phase on the basis of theoretical calculations [J].

Dorofeeva, Olga V. ;

Ryzhova, Oxana N. .

JOURNAL OF CHEMICAL THERMODYNAMICS, 2009, 41 (04) :433-438

← 1 2 3 4 5 →