Examlex
Hydrogen is not an atom because it does not have any neutrons.
Calcite
A common mineral form of calcium carbonate, widely found in sedimentary, metamorphic, and igneous rocks.
Cleavage
The tendency of a mineral to break along flat, even surfaces as a result of weak bonding in certain directions in the mineral's crystal structure.
Fracture
a break or crack in rock or bone, often resulting from stress or impact.
Silicon Tetrahedron
A structural unit in silicate minerals, consisting of a silicon atom surrounded by four oxygen atoms in a tetrahedral arrangement.
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