Subreddit rules check
r/crystallography
Can you promote here?
Promotion is allowed only with moderator permission (or inside designated threads). A short, honest modmail before posting costs two minutes and functions as a safe-conduct pass; skipping it is the most common avoidable removal.
From the rules · Homework-style questions must show your attempt or they'll be removed; self-promotion/ads aren’t specified—ask the mods before posting promotional links.
Links
No explicit link policy. Default to no URL: link-plus-young-account is one of the most common automated removal patterns on Reddit.
What this community rewards
Dominant post formats: question, discussion, showcase
Post as a short, technical first‑person question or request for advice (1–3 short paragraphs) with data/images attached and instrumentation/processing details. Tone: professional and help‑seeking. Upvoted: clear problems, reproducible data, demonstrated effort; Removed: low‑effort ‘do my homework’ questions or vague posts without figures/parameters.
Arriving in the local format matters: cross-posting the same text everywhere reads as tourist instantly. The wider method is in the Reddit playbook.
Classified mechanically from the community's published rules and recent top posts, last checked July 2026. Rules change and moderators have the final say: verify at r/crystallography's rules page before posting anything that matters.
Thread Otter checks this before every send
These profiles power the product: promo-banned communities never receive a promotional draft, drafts arrive in the local format, and a fact-check gate plus human pacing protect the account doing the talking.