Oliver Kopp

University of Stuttgart

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Genevieve Clark

Mitre (United States)

Lawrence A. Harris

University of Kentucky

C. B. Finch

Oak Ridge National Laboratory

Marvin E. Bennett

Texas A&M International University

E.L. Fuller

Pacific Northwest National Laboratory

Z. H. Zuberi

A.D. Underwood

Oak Ridge National Laboratory

K. C. Misra

University of Tennessee at Knoxville

M. L. Ebers

M. A. Linkous

Cooperative Institutions

Oak Ridge National Laboratory

University of Tennessee at Knoxville

Massachusetts Institute of Technology

Indiana University Bloomington

American Ceramic Society

Plant (United States)

Institute of Minerals and Materials Technology

North East Institute of Science and Technology

Advanced Materials and Processes Research Institute

University of Lucknow

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Lamellar dendritic growth in lead sulfide

Journal of Crystal Growth (1971)

Oliver Kopp Genevieve Clark

Lead sulfide

Lead (geology)

10.1016/0022-0248(71)90035-2

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Citations (4)

Mineral sources of water in evaporite sequences (salado salt and adjacent beds at the proposed waste disposal facility near Carlsbad in Lea and Eddy Counties, New Mexico)

Oliver Kopp Douglas W. Combs

Results of this study indicates that the Salado Salt is composed primarily of fine to coarse-grained halite with polyhalite, anhydrite, and clay minerals. Other minerals detected in small amounts include gypsum, magnesite, quartz, feldspar, sylvite, carnallite, celestite(question), glauconite, and kainite(question). Petrographic evidence (hopper crystals, and intergrowth of halite with other minerals) indicate that the Salado Salt was deposited in rather shallow water and may have been exposed subaerially at times. There must have been a major change in environmental conditions between the deposition of the Castile Formation and that of the Salado. The evidence also suggests that fluids have been able to move through the Salado Salt along beds and seams of clay and silt and somewhat along fractures. Water loss upon heating to 102 +- 5/sup 0/C ranges from 0.0 to 3.5 percent, considerably lower than those for Lyons, Kansas samples. Most of the dehydration water at 100/sup 0/C comes from clay minerals, while at higher temperatures, polyhalite contributes. The rock units in Salado Salt seem to release much less water when dehydrated than the Hutchinson Salt rocks at Lyons. During preparation of some of the samples, H/sub 2/S and possibly some natural gas were released when the samples were crushed. (DLC)

Halite

Anhydrite

Silt

Glauconite

10.2172/7307422

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Citations (1)

A comparison of the loss of CO and CO 2 during coalification

International Journal of Coal Geology (2001)

Oliver Kopp Marvin E. Bennett

10.1016/s0166-5162(01)00029-5

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Citations (3)

Hydrothermal synthesis, optical perfection, and surface topography of quartz grown in RbOH and other alkali hydroxides

Journal of Crystal Growth (1968)

Oliver Kopp Genevieve Clark

Hydrothermal Synthesis

10.1016/0022-0248(68)90018-3

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Citations (6)

Czochralski growth of single-crystal fayalite under controlled oxygen fugacity conditions

American Mineralogist (1980)

C. B. Finch Genevieve Clark Oliver Kopp

Single-crystal boules of fayalite (FerSiOo) were grown in the temperature range 1165 to 1200'C at I bar total pressure from high-purity oxide melts of 1.95:l to 2.10:l Fe:Si atom ratio. A modified Czochralski technique was used, with platinum crucibles inductively heated under oxygen fugacities, /(Or), between l0-e and l0-'2 bar. The boules are up to l0 mm in diameter by 40 mm long and brownish-black in color. The best crystal homogeneity was obtained at growth rates of <3 mm/hr from 2.l: I Fe:Si melts at an /(O) of l0-r2 bar at I180 to ll85'C. Colorimetric data indicate boule Fe3* contents which increase with.synthesis /(Or) from 0.27Vo (10-'2 bar) to O.86Vo (10-' bar). The typical orthorhombic unit-cell parameters are a + 4.8214 to 4.8219, b : 10.47'74 to 10.4767, and c : 6.0gg0 to 6.0g934, varying slightly with synthesis /(O). The optical and infrared absorption spectrum is similar to that of natural fayalite, exhibiting a broad absorption band at 10,000A with transparency maxima at 7,000 and 25,0004. Samples appear stable up to melting at -l202oclf(Or) = l0-r'?barl, but lose weight and solidify incongruently.

Fayalite

Mineral redox buffer

Orthorhombic crystal system

Bar (unit)

Periclase

Source

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Citations (29)

Elemental concentrations and their distribution in two bituminous coals of different paleoenvironments

International Journal of Coal Geology (1981)

Lawrence A. Harris Heather Barrett Oliver Kopp

Bituminous coal

10.1016/0166-5162(81)90001-x

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Citations (27)

Coal precursors for carbon molecular seives. Quarterly progress report, July 1, 1995--September 30, 1995

Oliver Kopp

Shortly after our Quarterly Report for the period April 1, 1995 - June 30, 1995 was submitted, we completed the last two thermogravimetric-mass spectrographic (TG/MS) analyses of our samples. The results of these analyses will be included in the Final Report with the TG/MS data accumulated for the other coal samples. We then turned our attention to activating each of the coals using air activation. The results of the activation study are reported below.

Thermogravimetric analysis

Carbon fibers

10.2172/181491

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Citations (0)

Initial volatilization temperatures and average volatilization rates of coal — Their relationship to coal rank and other characteristics

International Journal of Coal Geology (1984)

Oliver Kopp Lawrence A. Harris

Volatilisation

Bituminous coal

10.1016/0166-5162(84)90003-x

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