| 31. | More complex clathrates can occur with hydrogen, water and other molecules such as methane,
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| 32. | Between 0.7 and 1.1 GPa the clathrate has a tetragonal structure.
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| 33. | Nonpolar molecules such as methane can form clathrate hydrates with water, especially under high pressure.
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| 34. | In clathrate structures, gases are enclosed in an icy cage and look like packed snow.
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| 35. | Polyoxometalates bear similarities to clathrate structures.
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| 36. | The cave also releases methane clathrate.
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| 37. | The release of the methane clathrates.
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| 38. | Estimates of the size of the total carbon reservoir in Arctic permafrost and clathrates vary widely.
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| 39. | Kieffer ( 2000 ) suggests no significant amount of clathrates could exist near the surface of Mars.
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| 40. | Arctic methane release from permafrost and methane clathrates is an expected consequence and further cause of global warming.
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