haüyne
oxford
views updated May 08 2018haüyne A feldspathoid and member of the
sodalite group of minerals, formula (Na,Ca)
4–8(Al
6Si
6O
24)(SO
4,S)
1–2; sp. gr. 2.5;
hardness 5.5; greyish-white; granular; occurs as a constituent of
alkali volcanic rocks, often with
pyrite.
A Dictionary of Earth Sciences AILSA ALLABY and MICHAEL ALLABY
vishnevite
oxford
views updated May 08 2018vishnevite See
CANCRINITE.
A Dictionary of Earth Sciences AILSA ALLABY and MICHAEL ALLABY
