The New Encyclopaedia Britannica, Volume 29Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 80
... analcime ; as the quantity of feldspathoids increases , tra- chyte passes into phonolite . Like many volcanic rocks , trachyte shows a streaked or banded structure due to flowage of the congealing lava . This structure may be revealed ...
... analcime ; as the quantity of feldspathoids increases , tra- chyte passes into phonolite . Like many volcanic rocks , trachyte shows a streaked or banded structure due to flowage of the congealing lava . This structure may be revealed ...
Page 875
... analcime NaAlSi206 H2O colourless , vitreous 5-51 / 2 2.2-2.3 white , gray , pink transparent to nearly opaque , brittle , well - formed crystals ; radiating aggregates cleavage refractive indices crystal remarks system space group very ...
... analcime NaAlSi206 H2O colourless , vitreous 5-51 / 2 2.2-2.3 white , gray , pink transparent to nearly opaque , brittle , well - formed crystals ; radiating aggregates cleavage refractive indices crystal remarks system space group very ...
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