A STUDY OF HEXAGONAL AND CUBIC ICE AT LOW TEMPERATURES
The formation of hexagonal and cubic forms of ice was studied by the use of a cold stage in an electron microscope within the temperature range of - 190 to 170 degrees C. Ice crystal specimens were made on cold substrates, i.e., a collodion film, gold foil, or copper grid on the specimen holder of t...
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ftdtic:AD0660323 2023-05-15T16:37:12+02:00 A STUDY OF HEXAGONAL AND CUBIC ICE AT LOW TEMPERATURES Kumai, Motoi COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1967-07 text/html http://www.dtic.mil/docs/citations/AD0660323 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0660323 en eng http://www.dtic.mil/docs/citations/AD0660323 Availability: Document partially illegible. DTIC AND NTIS Snow Ice and Permafrost *ICE THERMAL PROPERTIES LOW TEMPERATURE CRYSTAL STRUCTURE CRYSTAL LATTICES ELECTRON MICROSCOPES GRAIN SIZE PHASE STUDIES THERMAL EXPANSION HEATING PHOTOGRAPHIC ANALYSIS Text 1967 ftdtic 2016-02-21T09:49:33Z The formation of hexagonal and cubic forms of ice was studied by the use of a cold stage in an electron microscope within the temperature range of - 190 to 170 degrees C. Ice crystal specimens were made on cold substrates, i.e., a collodion film, gold foil, or copper grid on the specimen holder of the cold stage. The structural forms of the ice were detected with the electron microscope using the selected area electron diffraction method. The hexagonal form of ice formed on the cold substrates at temperatures from -90 to -100 deg C. At -100 to -130 deg C, both hexagonal and cubic forms of ice were detected. From - 130 to -160 deg C only cubic ice was found. At temperatures below -170 deg C, minute crystals of cubic ice were detected. No transformation of the structural form of ice from hexagonal to cubic or from cubic to hexagonal occurred when the temperature of the specimens was varied in the range of -90 to -160 deg C. The minute crystals of cubic ice formed below -160 deg C were transformed into larger cubic ice crystals by heating them to a temperature between -130 and -150 deg C. The lattice constants of hexagonal and cubic ice, and the coefficient of thermal expansion of ice were calculated from the experimental results. Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
institution |
Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Snow Ice and Permafrost *ICE THERMAL PROPERTIES LOW TEMPERATURE CRYSTAL STRUCTURE CRYSTAL LATTICES ELECTRON MICROSCOPES GRAIN SIZE PHASE STUDIES THERMAL EXPANSION HEATING PHOTOGRAPHIC ANALYSIS |
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Snow Ice and Permafrost *ICE THERMAL PROPERTIES LOW TEMPERATURE CRYSTAL STRUCTURE CRYSTAL LATTICES ELECTRON MICROSCOPES GRAIN SIZE PHASE STUDIES THERMAL EXPANSION HEATING PHOTOGRAPHIC ANALYSIS Kumai, Motoi A STUDY OF HEXAGONAL AND CUBIC ICE AT LOW TEMPERATURES |
topic_facet |
Snow Ice and Permafrost *ICE THERMAL PROPERTIES LOW TEMPERATURE CRYSTAL STRUCTURE CRYSTAL LATTICES ELECTRON MICROSCOPES GRAIN SIZE PHASE STUDIES THERMAL EXPANSION HEATING PHOTOGRAPHIC ANALYSIS |
description |
The formation of hexagonal and cubic forms of ice was studied by the use of a cold stage in an electron microscope within the temperature range of - 190 to 170 degrees C. Ice crystal specimens were made on cold substrates, i.e., a collodion film, gold foil, or copper grid on the specimen holder of the cold stage. The structural forms of the ice were detected with the electron microscope using the selected area electron diffraction method. The hexagonal form of ice formed on the cold substrates at temperatures from -90 to -100 deg C. At -100 to -130 deg C, both hexagonal and cubic forms of ice were detected. From - 130 to -160 deg C only cubic ice was found. At temperatures below -170 deg C, minute crystals of cubic ice were detected. No transformation of the structural form of ice from hexagonal to cubic or from cubic to hexagonal occurred when the temperature of the specimens was varied in the range of -90 to -160 deg C. The minute crystals of cubic ice formed below -160 deg C were transformed into larger cubic ice crystals by heating them to a temperature between -130 and -150 deg C. The lattice constants of hexagonal and cubic ice, and the coefficient of thermal expansion of ice were calculated from the experimental results. |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Kumai, Motoi |
author_facet |
Kumai, Motoi |
author_sort |
Kumai, Motoi |
title |
A STUDY OF HEXAGONAL AND CUBIC ICE AT LOW TEMPERATURES |
title_short |
A STUDY OF HEXAGONAL AND CUBIC ICE AT LOW TEMPERATURES |
title_full |
A STUDY OF HEXAGONAL AND CUBIC ICE AT LOW TEMPERATURES |
title_fullStr |
A STUDY OF HEXAGONAL AND CUBIC ICE AT LOW TEMPERATURES |
title_full_unstemmed |
A STUDY OF HEXAGONAL AND CUBIC ICE AT LOW TEMPERATURES |
title_sort |
study of hexagonal and cubic ice at low temperatures |
publishDate |
1967 |
url |
http://www.dtic.mil/docs/citations/AD0660323 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0660323 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0660323 |
op_rights |
Availability: Document partially illegible. |
_version_ |
1766027504910336000 |