IMA mineral species

Hellandite-(Ce)

(Ca,REE)₄Ce₂Al☐₂(B₄Si₄O₂₂) (OH)₂

Single chain inosilicate mineral.

Hellandite-(Ce) specimen
Hellandite-(Ce).jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula(Ca,REE)₄Ce₂Al☐₂(B₄Si₄O₂₂) (OH)₂
ElementsCa, Ce, Al, B, Si, O, H
Crystal system—
Mohs hardness—
Density—
Streak—
Color—
IMA symbolHld-Ce
Nickel–Strunz class9.DK.20

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

🌍 Where it's found

Type locality (where it was first described): Lake Vico, Italy

  • 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.