Formula: Re
Origin of name: from Latin for the river Rhine, the native region of the discoverers of the element
Crystal system: hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell:
Colour: black
Diaphaneity:
Luster:
Habit: irregular inclusions, 15 to 50 micron
Hardness:
Specific gravity: 21.03
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments: from a meteorite and in wolframite
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