Haxagonal Close Packed HCP Structure |c/a calculations |Packing fraction| Dr Muhammad Imran |

Round-13 hunt: picked; source: named-course long-video search (round-12 queries, single-hit channels, second prefilter); channel screens (sellers/exam/re-upload/devotional/vendor/events), provenance check, vendor/seller/devotional recheck and quality tier C + tier-C depth check passed; strict per-title check + final strict pass; oEmbed verified.

A 33-minute video from Dr Muhammad Imran: “Haxagonal Close Packed HCP Structure |c/a calculations |Packing fraction| Dr Muhammad Imran |”.

Video by Dr Muhammad Imran, played through YouTube's embedded player.