What powers iucr.org?
Last seen Jun 2026 · 27 technologies across 14 categories
Analytics
Authentication
CDN
CMS
Font scripts
JavaScript graphics
JavaScript libraries
Miscellaneous
Programming languages
Security
UI frameworks
Web frameworks
Web servers
Wikis
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| cubic close packed | #18 | 450 |
| cubic close packing | #15 | 350 |
| hexagonal close packed | #34 | 85 |
| cif | #26 | 70 |
| close packed structure | #3 | 57 |
| crystallography | #10 | 50 |
| philip coppens | #5 | 47 |
| johannes kepler scientist | #53 | 47 |
| star file | #2 | 34 |
| f crick | #15 | 34 |
| cif file | #4 | 32 |
| peter debye | #2 | 28 |
| wyckoff symbol | #3 | 25 |
| cif file format | #5 | 23 |
| star polyhedron | #3 | 17 |
| stereographic | #13 | 17 |
| indigo instruments | #3 | 17 |
| cif format | #4 | 14 |
| nobel prizes | #11 | 14 |
| max von laue | #4 | 14 |
| dorothy mary hodgkin | #15 | 12 |
| molecular mass calculator | #47 | 11 |
| international tables crystallography | #5 | 10 |
| closest packing | #6 | 9 |
| aperiodic crystals | #3 | 9 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 84% desktop
- 16% phone
Taiwan
Sweden
Denmark
United States
India
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
7.47 / 10 · ranked #18,299 of all domains
1,518 referring domains · OpenPageRank
Search traffic
1,800 est. monthly organic visits (US)
725 keywords in Google's top 30
Core Web Vitals
| LCP | 2.2 s |
| INP | 25 ms |
| CLS | 0.05 |
| TTFB | 1700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- CDN: Cloudflare
- Weight: 0.4 MB · 84 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| dictionary.iucr.org | 10 |
| journals.iucr.org | 9 |
| laaamp.iucr.org | 9 |
| www.iucr.org | 9 |
| asca.iucr.org | 8 |
| iucrdata.iucr.org | 8 |
| laamp.iucr.org | 8 |
| symmdb.iucr.org | 7 |
| it.iucr.org | 6 |
| publbio.iucr.org | 5 |
| publcif.iucr.org | 4 |
| reference.iucr.org | 3 |
| xrpp.iucr.org | 3 |
| checkcif.iucr.org | 1 |
| oldwww.iucr.org | 1 |
| scripts.iucr.org | 1 |
| search.iucr.org | 1 |
| submission.iucr.org | 1 |
| ww1.iucr.org | 1 |
Full technology history →
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Recent changes
- dropped YouTube Jun 2026
- detected YouTube Feb 2026
- dropped Twitter Dec 2025
- dropped Twitter Ads Dec 2025
- dropped Google Tag Manager Nov 2025