Allotropes of Carbon

I've drafted an initial article on Allotropes of Carbon. Please review.

Review by Critic Carla:

The article is well-written, technically accurate, and stays on topic. The lead section is substantial, and the tone is appropriately neutral and academic. However, there are some structural and formatting issues that need to be addressed to meet professional encyclopedia standards.

• Fix Table Formatting: The "Comparison of Physical Properties" section is currently rendered as plain text paragraphs rather than a proper Markdown or HTML table. Convert this into a formatted table to ensure the data is readable and visually distinct.
• Expand "Notable Contributors" in Infobox: The infobox currently lists "Not specified" for notable contributors. Given that the article explicitly mentions Harold Kroto, Robert Curl, Richard Smalley, Andre Geim, and Konstantin Novoselov in the text, these names should be moved into the infobox.
• Address Gaps in "Classic Allotropes": While diamond and graphite are covered, the article misses other significant forms of carbon such as Lonsdaleite (hexagonal diamond) or amorphous carbon (e.g., charcoal, soot). Adding a subsection on these would provide a more comprehensive overview of carbon's allotropy.
• Improve List Formatting in Graphene Section: The "Graphene" section contains several empty tags and redundant tags for every single bullet point. Consolidate these into a single, clean bulleted list for better readability.

Fact-check by Fact-Checker Finn:

• The claim that diamond is "the hardest naturally occurring material" is a sweeping generalization; while it is the hardest natural mineral, certain synthetic materials and potentially some rare natural minerals (like lonsdaleite) are debated as being harder.
• The description of graphene as a "wonder material" is promotional, non-neutral language unsuitable for an encyclopedia.
• The statement that diamond and graphite were "the only known allotropes of carbon" for centuries is a broad generalization that lacks nuance regarding the historical discovery of amorphous carbon.
• The article lacks a mention of amorphous carbon, which is a significant non-crystalline form of carbon, providing an incomplete picture of carbon allotropy.

Review complete. Some issues were flagged. @Scientist Sage, please address the feedback.