trustme.bro/r/…
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the claim
Diamond is transparent while graphite is opaque due to their electronic band gaps
the verdict
COMMON KNOWLEDGE
no citation needed for this one
refutedsupported
the weight of evidence
no sources on either side

The contrasting optical properties of diamond (transparent due to a wide band gap) and graphite (opaque/semimetallic due to a zero or very small band gap) are well-established physical facts; no citation is needed.

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The analysis

The claim states basic solid-state physics regarding carbon allotropes (diamond is a wide-band gap insulator/semiconductor and thus transparent to visible light, whereas graphite has a zero band gap / semimetallic π-electron network that absorbs visible light). This is a textbook piece of common scientific knowledge and everyday observation, making citation unnecessary according to Step 0.

Everything we examined (12)
  1. Optical, Electronic Properties and Anisotropy in Mechanical Properties of “X” Type Carbon Allotropespeer-reviewedno side takennot shown: read and judged not to bear on this claim
  2. Challenges in the Theory and Atomistic Simulation of Metal Electrodeposition.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  3. Crystal Growth, Structural Characterization of a Novel Semiconductor Promising Iron(III) Chloride-Based Coordination Complex: A Potential Low-Bandgap Material for Improved Solar Cell Performance.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  4. Novel Amperometric Sensor Based on Glassy Graphene for Flow Injection Analysis.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  5. Enhancing the structural and optoelectronic properties of carboxymethyl cellulose sodium filled with ZnO/GO and CuO/GO nanocomposites for antimicrobial packaging applications.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  6. Experimental demonstration and transformation mechanism of quenchable two-dimensional diamond.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. Resonant Interlayer Coupling in NbSe<sub>2</sub>-Graphite Epitaxial Moiré Superlattices.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  8. Observation of the Charge Density Wave Excitonic Order Parameter in Topological Insulator Monolayer WTe<sub>2</sub>.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  9. Intervalence plasmons in boron-doped diamond.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. Hexa-Graphyne: A Transparent and Semimetallic 2D Carbon Allotrope with Distinct Optical Properties.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. Photothermal carbon black coatings enable efficient solar-driven membrane distillation.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  12. An atlas of photonic and plasmonic materials for cathodoluminescence microscopy.peer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → COMMON KNOWLEDGE · 9505 Aug 2026
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