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the claim
A face-centred cubic unit cell is crystallographically distinct from a body-centred tetragonal unit cell
the verdict
COMMON KNOWLEDGE
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refutedsupported
the weight of evidence
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A face-centred cubic (FCC) unit cell and a body-centred tetragonal (BCT) unit cell are fundamentally different crystal systems with distinct lattice parameters and symmetry properties.

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The analysis

The claim states a basic, universally accepted crystallographic fact: face-centred cubic and body-centred tetragonal are distinct unit cell types defined by different Bravais lattices. According to the instructions, statements that are trivially true by definition or direct everyday/textbook observation are classified as COMMON_KNOWLEDGE and do not require citations, even though background papers discuss FCC and BCT structures.

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first checked04 Aug 2026
judged → COMMON KNOWLEDGE · 9504 Aug 2026
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