Occurrences of natural zeolites - Present status and future research 3
J.R. Boles

A potential economic mordenite deposit, Talkeetna Mountains, Alaska 19
D.B. Hawkins

Application of zeolites to petroleum exploration 29
A. Iijima

Occurrence and genesis of hydrothermal zeolites and related minerals from 39
the Kuroko-type mineralization areas in Japan
M. Utada

Zeolites in tuffaceous rocks of the West Carpathians (Slovakia) 49
E. Šamajová

Occurrences and genesis of sedimentary zeolites in Serbia 59
J. Obradović

Clinoptilolite from Zalogka Gorica, Slovenia, Yugoslavia 71
N. Krośl-Kuśćer, P. Ković

Genetic features of zeolitic rocks in Bulgaria 77
B. Alexiev, E. Djourova

Mineralogy of Italian sedimentary phillipsite and chabazite 87
M. de' Gennaro, E. Franco

Characterization of clinoptilolites of Western Anatolia 99
H. Yücel, A. Çulfaz

Physical-chemical aspects of zeolite formation in nature 111
E.E. Senderov

The possibility of zeolite formation in bentonite slurries during storage and drying. 149
The structure factor
E.T. Stepkowska, S.A. Jefferis

Crystallization of ZSM-5 from natural Japanese mordenite and clinoptilolite 161
Y. Goto, L.B. Sand

Experiments on the formation conditions and morphology of chabazite from 171
volcanic glasses
H. Höller, U. Wirsching

Hydrothermal treatment of clinoptilolite and mordenite 193
V.G. Ilin, V.G. Voloshinets

Optical properties of zeolites under high pressure in fluids 203
O.V. Kholdeev, I.A. Belitsky, B.A. Fursenko

The structural classification of zeolites 217
W.M. Meier

The tetrahedral framework of natural zeolites: silicon-aluminum distribution 223
G. Gottardi, A. Alberti

High resolution magic-angle-spinning solid state 29Si-NMR characterization of 245
the structure and aluminium orderings in natural and synthetic zeolites of the
chabazite group
P. Bodart, J.B. Nagy, Z. Gabelica, E.G. Derouane

Analysis of vibrational spectra and phase transitions in zeolites (natrolite, 257
edingtonite, chabazite)
S.V. Goryainov, I.A. Belitsky

Ir-spectroscopic investigation of dehydration process of the natrolite group natural 265
zeolites
J.I. Mirzai, M.M. Dubinin

Proton conduction in lithium exchanged chabazite in the hydrated state 275
E. Krogh Andersen, I.G. Krogh Andersen, E. Skou, S. Yde Andersen

Natural chabazite: heats of rehydration and X-ray study in relation to H₂O 283
contents at room temperature
G.P. Valueva, I.A. Belitsky, I.V. Seryotkin, V.S. Pavlyuchenko

Co(III) ion sorption of zeolitic rocks and minerals from the Tokaj Hill (Hungary) 291
E. Pécsi-Donáth, G. Nagy

Investigation of the disordered conditions of natrolite, mesolite and thomsonite by 309
means of ir reflection spectra
F. Pechar

Structure and dynamics of water molecules in harmotome 321
E. Stuckenschmidt, B.P. Schweiss, H. Fuess, R. Stockmeyer

Development of uses for natural zeolites: a critical commentary 333
F.A. Mumpton

Perspectives of natural zeolite applications 367
G.V. Tsitsishvili

Occurrence and application of natural zeolites in Japan 395
H. Minato

Structure and localization of hydrated alkali, alkaline-earth and transition metal 421
cation in clinoptilolite determined from ion-exchange, calorimetric and spectral
measurements
Yu. I. Tarasevich, V.E. Polyakov, L.I. Badekha

Ion exchange in near-homoionic ferrierites 431
Z.B. Ahmad, A. Dyer

Cation exchange characteristics of gulf coast clinoptilolite 449
Ky Lieu, C.W. Williford, Jr., W.R. Reynolds

Silver(I) sorption on clinoptilolite and vermiculite and their modifications 463
G. Gradev, A. Avramova, I. Stefanova

Simultaneous sorption of metal ions on natural zeolite clinoptilolite 471
A. Assenov, Chr. Vassilev, M. Kostova

Pilot plant study for removal of ammonia from drinking water with natural zeolite 483
J. Hlavay, J. Inczédy, K. Földi-Polyak, Z. Zimonyi

Ammonium removal from tannery sewages by selective ion exchange using natural 491
phillipsite
C. Colella, R. Aiello

Ammonium recovery from urban sewage by natural zeolites 501
P. Ciambelli, P. Corbo, L. Liberti, A. Lopez

Removal of suspended solids, phosphate and ammonium ions from communal 511
sewage using clinoptilolite derivatives
J. Oláh, J. Papp, Á. Mészáros-Kis, Gy. Mucsy, D. Kalló

Use of natural zeolites for purification of industrial waste waters from toxic organic 521
chlorine compounds
S.M. Rustamov, Z.Z. Bashirova, F.M. Nasiri, A.I. Yagubov, A.A. Muradova

Removal of copper from electroplating effluents (potch water) using clinoptilolite 529
Zhao Guangsheng, Li Xingzheng, Li Guangju, Zhang Quanchang

Comparison of wet chemistry CEC determinations 541
Ky Lieu, C.W. Williford, Jr., W.R. Reynolds

Adsorption-energetical and thermoanalytical studies of clinoptilolite in 553
H, Li, Na, K, Cs, Mg, Ca, Sr, Ba-cation exchanged forms
A.A. Isirikyan, M.M. Dubinin

Effects of composition on the dehydration behaviour of clinoptilolite and heulandite 565
D.L. Bish

Polymineral rocks as sorbents for oxygen enrichment of air 577
I.M. Galabova, G.A. Haralampiev

Adsorptive removal of sulphur organic compounds of oil by natural and acid 589
modified clinoptilolites
E.M. Benashvili, T.G. Uchaneishvili, T.N. Charkviani

Catalysts from Hungarian natural clinoptilolite and mordenite 601
D. Kalló

Changes in the acidity and catalytic activity of natural mordenites during various 625
pretreatments
P. Ciambelli, G. Bagnasco, E. Czárán, J. Papp

A method for the modification of Slovak natural mordenite for catalytic purposes 633
P. Hudec, J. Novanský, E. Šamajová, J. Madar

Possibilities of using Bulgarian natural zeolites as catalysts for 643
hydrodesulphurization
P. Kovacheva, N. Davidova, D. Shopov

Hydroisomerization of n-hexane on a natural mordenite catalyst 653
L. Gubicza, A. Ujhidy, A.G.S. Jánossy, K. Behlendorff

The conversion of methanol into hydrocarbons over modified clinoptilolites 663
N. Nitta, H. Sakoh, K. Aomura

Behaviour of zeolitic minerals during soil formation 675
E. Nemecz, A.G.S. Jánossy, V.J. Olaszi

Occurrence and weathering of zeolites in soil environments 699
D.W. Ming, J.B. Dixon

The utilization of natural zeolite in Azerbaijan SSR for increasing yield of wheat 717
I. Sh. Iskenderov, S.N. Mamedova

The effect of different levels on the performance of growing pigs 721
M. Castro, M. Pastrana

Natural zeolites: swine waste water treatment and biomass production 729
A. Marton, R. Marculescu

The addition of natural zeolite to food ratios and its effect on the state of health 737
of pigs and the quality of meet products
G. Kováč, L. Vrzgula, P. Bartko, M. Prosbová

The effect of feeding natural zeolite on indices of the internal environment of 747
calves in the postnatal period
V. Vrzgula, M. Prosbová, J. Blažovský, U. Jacobi, T. Schubert, G. Kováč

Preparation of polymer-coatings of natural zeolites 755
P. Fejes, T. Tihanyi, I. Kiricsi, I. Csikai, O. Gottlasz, G. Horváth

Solar energy storage by natural zeolites. II. Activation and heat recovery in open 763
systems
R. Aiello, A. Nastro, G. Giordano, C. Colella

Investigations of Hungarian natural zeolites for use in solar cooling 773
P. Fejes, I. Hannus, I. Kiricsi

Drying cartridges from natural zeolites and their application in refrigeration systems 781
K. Sebestyén-gömöri, L. Zsankó, G. Klopp, J. Valyon, J. Papp

Research on natural zeolites as buffer material in the waste repository system of 791
Japan
M. Muroi, M. Takizawa, M. Utada, N. Fujita, K. Ishigure

The zeolitized tuffs of Mount Vulture (Basilicata, Italy): Mineralogical and 803
physico-chemical study for use as decontaminants for radioactive solutions
G. Lenzi, G. Cassano

Effects of the temperature treatment of volcanic tuffs on the performances of 821
resultant blended cements
R. Sersale, G. Frigione

Carcinogenic and fibrogenic effects of erionite, mordenite and synthetic zeolite 829
Y. Suzuki, N. Kohyama