Natural Zeolites: a New Industrial Mineral Commodity 3
Frederick A. Mumpton

Mineralogy and Crystal Chemistry of Zeolites 31
Glauco Gottardi

Lattice-constant Variations in Cation-exchanged Chabazites 45
Elio Passaglia

Positions of Cations and Molecules in Zeolites with the Mordenite-type Framework. IV. Dehydrated and
Rehydrated K-exchanged "Ptilolite" 53
W. M. Mortier, J. J. Pluth, and J. V. Smith

Characterization of the Offretite- Levynite Intergrowth from Beech Creek, Oregon, by Adsorption and
Electron Diffraction 77
J. M. Bennett and R. W. Grose

Crystal Structures of the Heat-collapsed Phases of Barrerite 85
A. Alberti and C. Vezzalini

Constituent Sheets in the Zeolite Frameworks of the Mordenite Group 99
W. M. Meier

Dachiardite-bearing Zeolite Assemblages in the Pacific Northwest 105
W. S. Wise and R. W. Tschernich

Morphology of Zeolites in Sedimentary Rocks by Scanning Electron Microscopy 113
F. A. Mumpton and W. C. Ormsby

Geologic Occurrence of Zeolites 135
R. L. Hay

Zeolites in Saline, Alkaline-lake Deposits 145
R. C. Surdam and R. A. Sheppard

Geological Occurrences of Zeolite in Marine Environments 175
Azuma Iijima

Zeolites in Pelagic Sediments of the Atlantic, Pacific, and Indian Oceans 199
M. Kastner and S. A. Stonecipher

Chemistry of Deep-sea Phillipsite, Clinoptilolite, and Host Sediments 221
S. A. Stonecipher

Nature and Origin of Deep-sea Clinoptilolite 235
J.R. Boles and W.S. Wise

Generation of Phillipsites by Palagonitization of Basaltic Glass in Sea Water and the Origin of
K-rich Deep-sea Sediments 245
Jose Honnorez

Deep-sea Phillipsites: Trace Geochemistry and Modes of Formation 259
M. Bernat and T. M. Church

Authigenic Laumontite in Deep-sea Sediments 269
C. D. Sands and J. I. Drever

Zeolite Zones in Geothermal Areas in Iceland 277
H. Kristmannsdottir and J. Tomasson

Occurrences and Uses of Zeolites in Italy 285
Riccardo Sersale

Composition and Origin of Analcime in Taiwanite, a Glassy Basaltic Rock in the
Eastern Coastal Rnage, Taiwan 303
H.J. Lo

Zeolites in Tuff Beds of the Miocene Waitemata Group, Auckland Province, New Zealand 309
T. Sameshima

Bowie Zeolite Deposit, Cochise and Graham Counties, Arizona 319
R. A. Sheppard, A. J. Gude, 3rd, and G. M. Edson

Experiments on the Formation of Zeolites by Hydrothermal Alteration of Volcanic Glasses 329
H. Holler and U. Wirsching

Hydrothermal Synthesis of Clinoptilolite and Comments on the Assemblage
Phillipsite- Clinoptilolite- Mordenite 337
D. B. Hawkins, R. A. Sheppard, and A. J. Gude, 3rd

Hydration as an Early Stage in the Zeolitization of Natural Glass 345
C. Colella, R. Aiello, and C. Porcelli

Properties of Natural Zeolites 353
D. E. W. Vaughan

Sorption and Diffusion Properties of Natural Zeolites 373
Y.H. Ma and T.Y. Lee

Cation-exchange Equilibria in Zeolites and Feldspathoids 385
R. M. Barrer

Adsorption and Catalytic Properties of Some Soviet Natural Zeolites 397
G. V. Tsitsishvili

Sorption and Diffusion in Natural Erionite 403
D. M. Ruthven and R. I. Derrah

A Survey of Catalytic Properties of North American Clinoptilolites . 411
N. Y. Chen, W. J. Reagan, G. T. Kokotailo, and L. P. Childs

Thermal Stability of Natural Gmelinite and Some of its Ion-exchanged Forms 421
G. H. Kuhl and J. N. Miale

Oxygen Enrichment of Air Using Bulgarian Clinoptilolite 431
I. M. Galabova, G. A. Haralampiev, and B. Alexiev

Utilization of Natural Zeolites in Japan 441
K. Torii

Zeolite Ion Exchange in Radioactive and Municipal Wastewater Treatment 451
B. W. Mercer and L. L. Ames

Ion-exchange Reactions of Processed Zeolite and its Application to the Removal of
Ammonia-Nitrogen in Wastes 463
Z. Hagiwara and M. Uchida

Natural Zeolites: Novel Uses and Regeneration in Wastewater Treatment 471
C. O. Murphy, O. Hrycyk, and W. T. Gleason

Solar Energy Application of Natural Zeolites 479
D. l. Tchernev

Cleansing Action of Natural Zeolites in Detergents 487
H. G. Smolka and M. J. Schwuger

Evaluation of Natural Ferrierite as a Claus Tail-gas Catalyst 495
C. W. Chi, H. Lee, and D. E. W. Vaughan

The Potential Use of Natural Zeolites for Ammonia Removal During Coal-gasification 503
D. T. Hayhurst

Production of Oxygen and Nitrogen with Natural Zeolites 509
H. Minato and T. Tamura

The Selectivity of Clinoptilolite for Certain Heavy Metals 517
M. J. Semmens and M. Seyfarth

Beneficiation of Natural Zeolites from Bowie, Arizona: a Preliminary Report 527
K. D. Mondale, F. A. Mumpton, and F. F. Aplan