+Ca7 denotes a rare [atomic cluster](/wiki/Atomic_Cluster) formed from seven [calcium](/wiki/Calcium) atoms. Such compact arrangements present unique quantum properties, distinct from individual atoms or bulk metal. Their study offers a window into the behavior of matter at the nanoscale.
+## See also
+- [Metal Cluster](/wiki/Metal_Cluster)
+- [Nanomaterial](/wiki/Nanomaterial)
+- [Quantum Dot](/wiki/Quantum_Dot)
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