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A greenish gray or black silicate of iron and aluminum
Answer for the clue "A greenish gray or black silicate of iron and aluminum ", 9 letters:
chamosite
Word definitions for chamosite in dictionaries
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
chamosite \chamosite\ n. a greenish gray or black silicate of iron and aluminum.
Wiktionary
Word definitions in Wiktionary
n. (context mineral English) A monoclinic-prismatic mineral containing aluminum, hydrogen, iron, magnesium, oxygen, and silicon.
WordNet
Word definitions in WordNet
n. a greenish gray or black silicate of iron and aluminum
Wikipedia
Word definitions in Wikipedia
Chamosite is the Feend member of the chlorite group . A hydrous aluminium silicate of iron , which is produced in an environment of low to moderate grade of metamorphosed iron deposits, as gray or black crystals in oolitic iron ore. Like other chlorites, ...