Gerald L. Klein

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J. V. Smith

United States Naval Academy

D. Howard

Lawrence Berkeley National Laboratory

Russell C. Boggs

Eastern Washington University

Christopher Grassotti

University of Maryland, College Park

Louis Garand

Environment and Climate Change Canada

Jacques Hallé

Environment and Climate Change Canada

R. W. Tschernich

Snohomish Health District

Cooperative Institutions

NOAA National Environmental Satellite Data and Information Service

Colorado State University

Environment and Climate Change Canada

Eastern Washington University

University of California, Santa Barbara

University of Maryland, College Park

Earth System Science Interdisciplinary Center

Cooperative Institute for Climate and Satellites

NOAA Center for Satellite Applications and Research

National Oceanic and Atmospheric Administration

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Boggsite, a new high-silica zeolite from Goble, Columbia County, Oregon

American Mineralogist (1990)

D. Howard R. W. Tschernich J. V. Smith Gerald L. Klein

The new zeolite boggsite occurs as small, colorless-to-white, zoned hemispheres embedded in drusy tschernichite in small vesicles in dense Eocene basalt near Goble, Columbia County, Oregon, where it formed through the action of local hydrothermal activity. The mineral is orthorhombic, space gtoup Imma, with 4 : 20.21(2), b : 23.77(l), and c : 12.80(l)A.ttrestrongestX-raydiffractionlinesare(inA) tt.f(tOO),4.43(70),3.86(80), 3.37(100). The chemical composition is near (CarrNar.rKorMgo')(Feo,Al,83sii76)Ore2' 70H,O, with Z : l, Si/Al : 4.24.Ir is optically biaxial (-), with a : 1.480(l), 0 : 1 .481 ( l ) , and7 :1 .487 ( l ) ,whe reX :c ,Y :a ,Z :b .Thedens i t y i s1 .98 ( l ) g / cm3(obs ) , 1.99 g/cm3 (calc). Tiny blades of boggsite with the forms {01l}, {102}, {010}, {100}, and {001} elongated along the b axis have a morphology similar to that of thomsonite. The name honors Robert M. Boggs of Seattle, Washington, and Russell C. Boggs of Cheney, Washington.

Orthorhombic crystal system

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Tschernichite, a new zeolite from Goble, Columbia County, Oregon

American Mineralogist (1993)

Russell C. Boggs D. Howard J. V. Smith Gerald L. Klein

The new zeolite occurs as 0.1-10mm, colorless to white, steep tetragonal dipyramids commonly showing the forms {302} and {001} as drusy linings, radiating hemispherical groups, and single and twinned crystals in small vesicles in dense Eocene basalt near Goble, where it has formed through the action of local hydrothermal activity. The mineral is tetragonal, posssible space group P4/mmm, with a=12.880 and c=25.020A. A relationship with zeolite beta suggests that tschernichite may consists of an intergrowth of an enantiomorphic pair in the tetragonal space groups P4 1 22 and P4 3 22 and a triclinic polymorph with space group P1

Triclinic crystal system

Tetragonal crystal system

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On Differences in Radiosonde Humidity-Reporting Practices and Their Implications for Numerical Weather Prediction and Remote Sensing

Bulletin of the American Meteorological Society (1992)

Louis Garand Christopher Grassotti Jacques Hallé Gerald L. Klein

Radiosonde humidity distributions over the United States, Canada, and Europe are discussed. Striking dry-end and wet-end differences are caused by the lack of international standards in the transformation of relative humidity observations to dewpoint depression and in differing ways of calibrating data taken from the same type of instrument. Differences in sondes used in these regions are also discussed and an example of a dual ascent is shown. Some implications for remote sensing and weather prediction are highlighted.

Dew point

Weather modification

10.1175/1520-0477(1992)073<1417:odirhr>2.0.co;2

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Citations (54)