IMA mineral species

Rankinite

Ca₃Si₂O₇

Sorosilicate mineral.

Rankinite specimen — Areas with ellinaite in gehlenite-rankinite paralava (cropped).png · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula	Ca₃Si₂O₇
Elements	Ca, Si, O
Crystal system	Monoclinic
Mohs hardness	—
Density	—
Streak	—
Color	—
IMA symbol	Rnk
Nickel–Strunz class	9.BC.15

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

🌍 Where it's found

Type locality (where it was first described): Scawt Hill, United Kingdom

Type locality
Notable source / deposit
Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.

Learn more

Rankinite on Mindat.org
Wikidata item Q3930127 (source of this page's data – you can correct it there)