PROCEEDINGS OF THENINTH NATIONAL SYMPOSIUM

ON

THERMAL ANALYSIS

GodBambolim, Qoa

November 8-10, 1993

Editad by

P. V. RavindranM. Sudersanan

Analytical Chemistry Division

a n d

S. R. BharadwajS. R. Dharwadkar

Applied Chemistry Division

Bhabha Atomic Research Centre* Bombay 400 085

Published by

C/o. Analytical Chemistry DivisionBhabha Atomic Rasaarch Centra, Bombay 400 085

1993

TABLE OF CONTENTS

Page No.SECTION I - INVITED LECTURES

I. 1 Representation of kinetic data asemperical equations for convenient usein the industryH.S.Ray and A.K.Tripathy 3

I. 2 Monitoring near real-event parameters inenergetic materialsS.R.Jain 12

SECTION II - SPECIAL LECTURES ON ADVANCES ININSTRUMENTATION

II. 1 Modulated differential scanningcalorimetryD.R.Kamm, B.S.Crowe and M.Reading 19

II. 2 Calorimetric techniques to obtainaccurate thermodynamic and kinetic dataR.B.Cassel, P.Scotto, P.S.Jainand N.P.DiVito 27

II. 3 Conformity check of products by thermalanalysisP.A.Schmid 33

II. 4 Progress in thermal analysisinstrumentation and evaluation softwareJ.Janosch&k and J.Opfermann 34

II. 5 Thermal analysis of some common polymersJ.K.Arthur and J.P.Redfern 35

II. 6 Rheology and the thermal analystSteve Goodyer 36-

Section III - CHARACTERISATION OF INDUSTRIALMATERIALS AND PROCESSES

III. 1 Microcalorimeter protocol for thermalhazard evaluationA.Koshy, M.Surianarmyanan and K.V.Raghavan 39

III. 2 Thermal analysis of washed, microwavetreated and magnetically separated coalsof south eastern coal fields, IndiaB.K.Pal, P.G.Mukunda and V.Mahadevan 43

III. 3 Performance evaluation of cured engineoils by thermal techniquesM.C.Jain, D.Kumar, A.M.Rao, S.K.Jainand S.P.Srivastava 47

III. 4 The anomalous oxidation behaviour of gasbased direct reduced iron (DRI) and theuse of thermal analysis techniques in thecharacterisation of DRIA.Bandopadhyay, K.N.Gupta and H.S.Ray 52

III. 5 Application of thermal analysis in thestudy of oxidation of sulphide mineralsK.S.Rao, B.Sarangi and H.S.Ray 57

III. 6 Evaluation of battery grade manganesedioxide by thermal analysisS.B.Kanungo, B.Sarangi and S.K.Mishra 61

III. 7 Thermal analysis of reaction sintering ofSi3N4/SiC in situ compositesM. K. V. Sharma, M.M. Godkhindi, M.M.Ma itiand P.G.Mukunda 65

III. 8 Preparation of uranium - cerium mixedcarbide microspheres by carbothermicreduction of (U,Ce)Oz+C gelJ.S.Naik, J.V.Dehadraya, S.K.Mukherjee,V.N. Vaidya and D.D.Sood 69

III. 9 Evaluation of plasma sprayed coatings bythermal analysisP. V.Anathapadmanabhan, K.P.Sreekumar,P.V.Ravindran and N. Venkatramani 73

III.10 Structural, transport, spectral andcatalytic studies of the system ZnCnO*-CdCrzCU over decomposition of heptanolS.S.Lokegaonkar and V.S.Darshane 77

III. 11 Thermal analysis of copper zeolitesR.Bhat and V.Krishnan 81

111.12 Low temperature DSC studies with collagenbio-polymeric matrix in animal hidesS.P.Rao, M.Surianarayananand K.V.Raghavan 84

111.13 Thermal methods in the characterisation ofacidic properties of montmorillonite claycatalystsJ.Ravichandran and B.Sivaaankar 88

111.14 Acidity-catalytic activity correlationin pillared clay catalysts - DSC andcatalytic cracking reaction studiesS.Vijaya Kumar, C.Vijaya, K.Rengarajand B.Sivasankar 92

II

III. 15 Thermogravimetrich studies on thepreparation of group IV metal nitridesN.Krishnamurthy, Y.J.Bhatt,R.Venkataramani and S.P.Garg 96

111.16 Catalytic behaviour of the systemZnFeCrO4-MnFeCrO4S.Q.Oak and V.S.Darshane 101

111.17 Application of thermal analysis topredict coal combustion parametersP.S.Rajalakshmi, S.Seetharamu andS.Palaniappan 105

111.18 3-diketonate of cobalt (II) asaccelerators for epoxy systemP.V.Reddy 109

111.19 Application of DTA in safe processing ofchemicalsC.S.Shukia, J.K.Das and M.Sri ram 113

1II.20 Effect of heat treatment on the porestructure, electrical conductivityand catalytic activity of marineferromanganese concretionsK.M.Parida, N.N.Das, J.R.Rao,P.K.Satpathy and S.B.Rao 116

111.21 Dilatometry and differential scanningcalorimetry of Al-U3Siz, Al-UAlx andAl-lfoOa fuel compositesP.V.Hegde, T.R.G.Kutty and C.Ganguly 120

111.22 Oxidation behaviour of uraniummononitride powderG.C.Jain and S.N.Piiiai 124

111.23 Thermal analysis of ceramic metallizingcompoundS.Das, A.N.Tiwari, A.R.Kuikarniand T.S.Syunry 129

111.24 Differential thermal analysis of selfpropagating high temperature synthesisreactionsJ.Subrahmanyam 133

111.25 TG and XRD analysis of condenser tubescalesA.K.Sriraman 135

111.26 Role of mineral matter in spontaneousheating tendency of washed coal samplesS.D.Barve and V.Mahadevan 138

111.27 Thermal analysis for the evaluation ofproblems in chemical recovery in pulpand paper industryR.M.Mathur, B. P. Thap 7 iya 7, R. Tandon andA.G.Kulkarni 142

III

111.28 Improved combustibility of spent pulpingliquors from various raw materials afterthermal treatmentR.K.Jain, A.Gupta, A.K.Dixit andA.G.Kuikarni ' 146

111.29 Thermoanalytical studies on floursfrom various cereals grainsD.Marjit and S.Ganguly 150

1II.30 Application of thermal analyticalsystems in pharmaceutical sciencesN.Shah 154

111.31 A. comparative study of thermal behaviourof jute fibre and jute stickS.N.Pandey, M.D.Mathew and A.Day 155

SECTION IV - POLYMERS AND OTHER ORGANIC COMPOUNDS '

IV. 1 Transcrystal1ine morphology in fibrereinforced polypropylene composites -a DSC studyP.K.Sengupta and D.Mukhopadhyay 159

IV. 2 Thermal studies of chloral hydrateA.G.Bhoi, G.N.Natu and S.B.KuTkarni 163

IV. 3 Synthesis and characterisationr ofthermally stable homopolyureascontaining double-strand heterocyclicunitsK.A.Reddy, S. K.Athithan and M.Srinivasan 167

IV. 4 Thermal decomposition of m-ditoluidin1umsulphateGurdip Singh, S.K.Vasudeva, I.P.S.Kapoor,M.Jain and S.Mudimannan 170

IV. 5 Thermal analysis of some N-N bondedepoxy resinsS.R.Jain and P.M.Thangamatheswaran 174

IV. 6 DSC as a diagnostic tool fordetermination of cause of incompletecuring of epoxy mica filled compoundVirendra Kumar and U.K.Gairola 178

IV. 7 Thermal, XRD and spectroscopic studieson N-nitroso diphenylamineR.M.Roy, K.V.Prabhakaran and E.M.Kurien 180

IV. 8 Thermal characterisation of polyimideblendsK.Krishnan, T.M.Vijayan, K.N.Ninan andV.Murugeaan 183

IV

IV. 9 Effect of atmosphere on the thermalbehaviour of hydroxy terminatedpolybutadiene resinK.Krishnan, R. Raj iv, G.Viswanathan,K.G.Kannan and K.N.Ninan 187

IV.10 Curing kinetics and thermal study of asolid diglycidyl ether of bisphenol-8epoxy resin using different aminesas curing agentsJ.K.Parekh, R.G.Patel and V.S.Patel 191

IV.11 Thermal stability of castor oil basedinterpenetrating polymer networksB.Suthar, M.Dave and K.Jadhav 197

IV.12 Thermal studies on unirradiated andgamma-irradiate polymer of aiiyldiglycol carbonatesP.C.Kalsi, K.D.Singh Mudhar, A.K.Pandaand R.H.Iyer 201

IV.13 Thermal analysis of the interface inpoly (vinyl chloride) - hydrogenatednitrile rubber laminated compositesN.R.Manoj and P. P. Da 204

IV.14 Thermochemical and spectral studies ofPAN degradationM.Surianarayanan and K.V.Raghavan 208.

IV.15 Thermal and dynamic mechanical studiesof a-poly(methyl methacrylate)/poly(p-t-butyl phenol formaldehyde) blendsA.K.Kaikar and P.S.Parkhi 212

IV.16 Studies on styrene-maleic anhydridecopolymers: thermal behaviour and curingkinetics with epoxy resinsR.A.Vohra, H.C.Trivadi and M.C.Trivadi 216

IV.17 Characterisation of graft copolymers ofsodium alginate by thermogravimetricanalysisG.B.Patel, B.G.PateJ, S.B. Shah,C.P.Patel and H.C.Trivadi 219

IV.18 Thermal behaviour of graft copolymers ofsodium salt of partially carboxy-met.iylated starchK.M.Joshi, V.K.Sinha, C.P.Patel andH.C.Trivadi 222

IV.19 Conducting polyaniline salts: a study bythermal analysisS.Paianiappan and B.H.Narayana 224

IV.20 Thermogravimetric studies on electronbeam initiated grafting of triallylcyanurate on to polyethyleneT.K.Chaki, P.G.Mukunda, A.B.MajaJi,V.K.Tikku and A.K.Bhowmick 228

IV.21 Differential scanning caloHmetricstudies of Nylon-6/polyolifines alloysY.P.Singh, D.P.Shah. B.V.Anklaswaria andM.H.Mehta 230

IV.22 Thermal analysis of the interpenetratingpolymer networks derived from castor oil-polyurethane-polyacrylatesT.Pattnaik, S.Lenka and P.L.Nayak 234

IV.23 Thermal and creep characteristics ofpolymers and their blendsSangita, P.K.Jain, I.R.Arya, R.Chandraand R.Bedi 238

IV.24 Thermal studies on diphenyl dithio-carbamates and modified bitumens forroad constructionS.D.Sharma, P.K.Jain, I.R.Arya,S.K.Mishra and R.C.Sharma 242

IV.25 Tris (3-amino phenyl) phosphine oxidebased methyl nadimide resinsS.Alam, L.D.Kandpal and I.K.Varma 246

IV.26 Thermal analysis studies of branchedpolysiloxanesJ.Geetha, S.S.Grover and G.G.Panicker 250

IV.27 Thermo-oxidative behaviour of butylrubber (II R) by thermal analysistechniqueA.Adhikari, A.S.Deuri and R.Mukhopadhyay 254

IV.28 Distribution of carbon black in NR/SBRblends by TGAA.Adhikari, S.Das Gupta, A.S.Deuri andR.Mukhopadhyay 258

IV.29 Thermal Characterisation of blends ofbismaleimide and polymer of diallylphthaiateM.N.Saraf, K.M.Chaudhari, K.Surekha andA.Chakraborty 264

IV.30 Thermal behaviour of keratin and melaminpresent in human nail and hairBani Marjit 265

IV.31 Methyl methacrylate and N-aryl maleimidecopolymer:effect of structure on glasstransition temperatureR.Bharel, V.Choudhary and I.K.Varma 266

VI

IV.32 Thermal transitions in liquid crystallinepolymersGangadhara and K.Kiahore 272

SECTION V - CERAMICS AND HIGH TEMPERATURE OXIDES

V. 1 High temperature x-ray powderdiffractometric studies on thelattice thermal expansion behaviourof Bi2CaSrzCuzOxM.D.Mathews and A.C.Momin 279

V. 2 Thermal studies on pure and dopedceramic sperconducting materials -a critical analysisA.C.Momin 281

V. 3 Thermal characterisation of mixed phaseprecursors of La and Co in the formationof LaCoCOsA.Kesavaraja, N.E.Jacob and A. V.Ramaswamy 283

V. 4 Debye and softening temperatufes ofxMnO.(1-x)BzO3 glassesK.J.Singh and S.S.Bhatti 287

V. 5 Estimation of Debye temperature ofGdzCuO4 from high temperature thermalconductivity dataC.G.S.PiiJai and A.M.George 291

V. 6 Investigations on the synthesis ofzirconolite (CaZrTizO7)N.C.Mishra and A.M.George 295

V. 7 Combustion synthesis of cadmium ferritesN.Arui Dhas and K.C.Patil 297

V. 8 Role of thermal analysis in the study ofsuperconductor YBazCu3O7-aA.N.Virkar 300

V. 9 Synthesis of barium titanate powder byan auto-ignition process: a thermaldecomposition studyS.Roy and S.Swami Pyari 305

V.10 Sintering and dilatpmetric studies ofcombustion derived cordieriteR.Gopichandran, C.Gangu7/ and K.C.Patil 307

V.11 Thermoanalytical investigations relatedto the formation of barium uranateP. Sriama Murti, G.Seanivasanand M.U.Kithari 311

VII

V.12 Investigation of the reaction behaviour ofselected neutron absorber materials withsiliconP.Sriama Murti, M.U.Kitheriand G.Seenivasan 315

V.13 X-ray and thermal studies on CszMo4 0i3phasesN.L.Misra, K.L.Chawia and N.C.Jayadavan 317

V.14 Phase studies on Rb-U-Mo-0 systemK.L.ChawTa, N.L.Misra, N.D.Dahaleand N.C.Jayadevan 321

V.15 Thermochemical studies on Tl-U-0 systemS.K.Sali, N.K.Kulkarni, S.Sampathand N.C.Jayadevan 325

V.16 Thermal studies of NazMo3 0ioand Naz M04 Oi 3V.S.Iyer, M.Keskar and N.C.Jayadevan 329

V.17 Characterisation of barium meta titanateprepared by glycerol routeT.V.Vittal Rao, R.V.Kamat, V.N.Vaidyaand D.D.Sood 333

V.18 Thermal stability of spinel ferriteaD.Basak and J.Ghose 337

V.19 Thermal behaviour of CuOx thin filmsevaporated by EB under MBE conditionsD.P.Gandhi, K.P.Mutha, J.C. Vyas,G.P.Kothial, P.S.Sarode, K.D.Singh,S.C.Sabharwal and M.K.Gupta 341

V.20 Study of phase relation in theNdF3-NdzO3 system by XRD, DTA and h ightemperature XRDA.K.Tyagi, J.M.Juneja and G.Chattopadhyay 345

SECTION VI - CHARACTERISATION OF INORGANIC COMPLEXES

VI. 1 Thermal and FT-IR studies of new ceriumintercalated zeolite derivativesS.P.Banerjee 351

VI. 2 Thermal analysis of cobalt (III) soapsT.N.Nagar, A.Tripathi, K.N.Panchal andP.Bahadur 357

VI. 3 Preparation and thermal decomposition ofhydrazine carbohydrate precursors to leadbased perovskites

, M.M.A.Sekar and K.C.Patil 360VI. 4 Thermal decomposition of some salicylato

(amine) cobalt (III) complexesN.N.Das 364

VIII

VI. 5 Synthesis, characterization and thermalanalysis of copper nitrate oxalyidihydrazideS.Ekambaram and K.C.Patil 368

VI. 6 Solid state thermochromism in nickel (II)complexes containing N1-isopropyl-2-methyl-1,2-propanediamineC.Pariya, A.Ghosh and N.Ray Chaudhuri 371

VI. 7 Preparation and thermal studies ofammonium actinide (M<+), [M=Th, U]octafluoridesM.K.Bhida, A.G.Page, M.D.Sastry,N.D.Dahale and N.C.Jayadavan 375

VI. 8 Effect of sulphate ions on the thermaldecomposition of ferric oxide hydroxidesprepared by homogeneous precipitationmethodsK.M.Parida and S.B.Rao 379

VI. 9 Thermal decomposition of iron (III)hydrated oxides.Part III. System : FeClz + NazCCbR.Nayak and T.P.Prasad 383

VI.10 Thermal decomposition of iron (III)hydrated oxides.Part IV. System : FeClz + NaOHT.P.Prasad and R.Nayak 386

VI. 11 Electrothermal analysis of iron (II)carboxylates and T-FezQjK.S.Rana 390

VI.12 Solid state reactions in the systemoxalate-bromate-chromium (III) oxideU.S.Shoba and M.R.Udupa 395

VI.13 Thermal decomposition of copperamino oxalateR.Prasad 399

VI.14 Role of the material of the cellassembly during thermal decompositionof zinc oxalateR.Majumdar, M.R.Mukhopadhyayand P.Sarkar 403

VI.15 Solid state reaction of UOz.i7 andU40» with (NH4)z304K.D.Singh Mudher, M.Keskar andN.C.Jayadavan 407

VI.16 Thermal Investigation and structuralstudies of some dinuclear complexesin the solid stateS.Mitra and P.Kundu 411

IX

VI.17 Thermal behaviour of microstructuredgibbsiteP.Sidhaswaran and A.N.Bhat 414

VI.18 Thermal dehydration and decomposition offerric chloride hydrateS.K.Mishra and S.B.Kanungo 418

VI.19 Thermal analysis of sodium fluoro-antimonatesJ.B.Charles and F.D.Qnanam 422

VI.20 Effect of erbium oxide on the thermalbehaviour ofammonium perchlorateD.V.Survasa, D.B.Sarwade and E.M.Kurien 425

VI.21 Thermal decomposition of glycine(potassium/hydrogen) fluoride crystalsR.M.Chaudhari and M.M.Khandpekar 428

VI.22 TG/DTA studies of some oxalates formingsuperconducting phasesM.Bhide, L.Bapat, G.Natu and V.Qogate 431

VI.23 Effect of GdzOs on thermal behaviour ofammonium diuranateY.B.Rao, B.Gopalan and S.Syam Sunder 435

VI.24 Thermal studies on oxydiperoxy chromata(VI) adducts with nitrogen containingligandsJ .Mural idhar, I.Mohanty, U.R.Patnaikand M.N.Sastry 438

VI.25 Thermal decomposition studies oftriphenyl tetrazolium halochromatesU.R.Patnaik, J .Mural idhar and T.P.Prasad 441

VI .26 Thermal invest igat ion on some monoamideand diamide complexes of hexavaienturaniumP.B.Ruikar and M.S.Nagar 445

VI.27 Thermal investigation and stereochemicalstudies of some cyclic ligand complexes ofnickel (II), copper (II), zinc (II) andcadmium (II) in the solid stateR.B.Singh, S.Mitra and P.Kundu 449

VI.,28 Studies on thermogravimetry anddifferential thermal analysis in thecharacterisation of certain mineralsin the uraniferrous sand stone type ore,Domiasiat, Meghalaya, India and theirsignificance in the ore beneficiation anduranium extractionRadha.R.Das and K.K.Dwivedy 453

^1.29 Thermoanalytical studies on apophyllitefrom Pune, IndiaA.Apte and A.V.Phadke 456

VI.30 Synthesis and thermal decomposition ofdiammonium alkali metal oxyfluorides(NH4 )zMVOzF4 .HzO [M=Li , K and. Rb]S.J.Patwe and U.R.K.Rao 46C

VI.31 Studies on fluorination of FeVO4 bythermal techniqueS.V.Adhyapak and U.R.K.Rao 464

VI.32 Tr1s ammonium rare earth (III)hexafluoro complexes [RE = Dy, Ho and Er]B.N.Wani and U.R.K.Rao^ 46a

VI.33 Thermal properties of metal-hydraziniumnitrilo-triacetate saltsG.K.Naik and J.S.Budkuley 472

SECTION VII- KINETICS OF SOLID STATE REACTIONS

VII. 1 Effect of physico-chemical properties ofcoke on reactivityR.S.Datta, S.B.Sarkar, H.S.Ray,T.K.Mukherjee, Bodh Raj and N.K.Ghosh 479

VII. 2 Kinetics of chloridization of nickeloxide and nickel bearing lateritic oresby gaseous HC1S.K.Mishra and S.B.Kanungo 484

VII. 3 On the isothermal reduction of iron ore:a thermal analysis studyB.P.Singh and B.Sarangi 488

VII. 4 Reaction behaviour and kinetic study ofthe oxidation of selected metalsM.U.Kitheri, P.Srima Murtiand G.Seenivasan ^ 493

VII. 5 Kinetics and mechanism of theoxidation of ZrCG.A.Rama Rao, V.Venugopal and D.D.Sood 497

VII. 6 The oxidation of uranium monocarbidemicrospheresS.K.Mukherjee, G.A.Rama Rao,J. V. Dehadraya, V.N. Va idya, V. Vanugopa 1and D.D.Sood 501

VII. 7 Kinetics and mechanism of UOz+C reactionS.K.Mukharjae, J.V. Dehadraya,V.N.Vaidya and D.D.Sood 505

VII. 8 Mechanism for the oxidation of mixeduranium cerium mononitrideJ.V.Dehadraya, S.K.Mukherjea,G.A.Rama Rao, V.N. Vaidya, V. Venugopa1and D.D.Sood 509

XI

VII. 9 The effect of r-irradiation on thethermal decomposition of barium oxalateK.K.Sahu, S.Bose and D.Bhatta 513

VII.10 Non-isothermal kinetics of thermaldehydration and decomposition of uranylnitrate hexahydrateI.Mohanty, J.Muralidhar andV.Chakravortty 517

VII.11 Kinetic compensation effect In the vacuumcarbothermic reduction of uranium dioxideR.S.Mehrotra 521

VII.12 Kinetics of aluminothermic reduction ofFezOs using DTAB.Sarangi, H.S.Ray and A.Sarangi 526

VII. 13 Influence of irradiation on the thermaldecomposition induction period of someinorganic solids with polyvalent anionsS.Otta, S.D.Bhattamisra and S.R.Mishra 530

VII.14 Kinetics of thermal decomposition ofammonium diuranateP.V.Ravindran and T.P.Radhakrishnan 534

VII.15 Effect of magnetic field on weightloss of ferrofluids in DTG studies.V.Ravikumar, K.V.R.Murthy and T.R.Joshi 538

VII.16 Rare earth oxide catalysed thermaldecomposition of barium oxalatehemihydrate : a gasometric studyS.Bose, K.K.Sahu and D.Bhatta 542

VII.17 Isothermal dehydration and thermalannealing of B0Br retention in neutronactivated LiBrO3.HzOR.S.Lokhande 546

VII.18 Kinetics and thermal degradation of anexplosiveMd.Nabiullah, B.M.P.Pingua and Jagdish 550

SECTION VIII- CALORIMETRY AND HIGH TEMPERATURETHERMODYNAMICS

VIII. 1 On the measurement of heat of fusion ofPbz Sbo Tei iA.Nasar, T.K.S.P.Qupta and M.Shamsuddin 553

VIII. 2 The influence of ambient atmosphere onthe enthalpy of fusion of pure metalsdetermined by differential scanningcalorimetryS.R.Dharwadkar, M.S.Samant,P.N.Namboodiri, A.S.Kerkar andA.B.Phadnis 557

•XII

VIII. 3 Determination of enthalpy Increment andenthalpy of formation of Cd-Ni compoundsR.Agarwal, V.Venugopal and D.D.Sood

VIII. 4 Enthalpy of mixing of Sn-Cd system usinghigh temperature Calvet microcalorimeterK.Jayanthi, V.S.Iyer and V. Vanugopa7

VIII. 5 The determination of enthalpy offormation and the enthalpy Increment ofCdo.sTeo.s by Calvet calorimetryR.Agarwal, V.Venugopal and D.D.Sood

VIII. 6 Thermal stability of palladium-platinumsystemS.R.Bharadwaj, A.S.Karkar, S.N.Tripathi,R.Kameswaran and S.R.Dharwadkar

VIII. 7 Vapour pressure of tellurium dioxideby a transpiration methodM.S.Samant, A.S.Kerkar, S.N.Tripathi andS.R.Dharwadkar

VIII. 8 Determination of free energy of formationof SrZrOs(s) by using micro-balanceS.Dash, Ziley Singh, R.Prasad andD.D.Sood

VIII. 9 Use of micro-balance for the measurementof free energy of formation of BaMoOsfs)S.Dash, Ziley Singh, R.Prasad andD.D.Sood

VIII.10 A simple method for in-s1tu calibrationof temperature measuring thermocouplesin bottom-loading thermogravimetric (TG)systemsS.R.Dharwadkar, M.S.Samant and A.S.Kerkar

VIII. 11 Determination of thermal properties ofNaBOz using Cahn vacuum microbalanceV.S.Iyer, K.Jayanthi, G.A.Rama Rao,D.B.Paranjpe and V.Venugopal

VIII. 12 Dissociation pressure and thermodynamicproperties of potassium tetrafluoborate(KBF4 )R.P.Tangri, J.M.Juneja and D.K.Bosa

VIII.13 Thermal studies on solution equilibriabetween CoClz(aq) and MClz(aq) [M=Mg**,Ca**, Sr**, Ba2*]V.M.Ranade, G.N.Natu and S.B.Kulkarni

Author Index 607

560

564

568

572

576

581

586

590

594

598

602

XIII