| 41. | In the case of silica cements, the process is called lithification.
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| 42. | The beach sand of Lake McKenzie is nearly pure silica.
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| 43. | Chelating groups have also been covalently bound to silica gel.
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| 44. | They were reportedly the largest silica sinter deposits on earth.
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| 45. | The silica precipitation formed many pools and steps over time.
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| 46. | Vacuum tubes with silica envelopes allowed for radiation cooling by incandescent anodes.
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| 47. | Silica-oversaturated rocks contain quartz ( or another silica polymorph ).
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| 48. | Silica-oversaturated rocks contain quartz ( or another silica polymorph ).
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| 49. | The cubic ? phase consists of dynamically disordered silica tetrahedra.
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| 50. | These are easy to fossilize due to their silica shells.
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