Crystopedia
IMA mineral species

Hundholmenite-(Y)

(Y,REE,Ca,Na)₁₅(Al,Fe³⁺)(CaxAs³⁺₁-x)(Si,As₅+)Si₆B₃(O,F)₄₈

Borosilicate mineral.

Properties

🔷 Trigonal
Chemical formula(Y,REE,Ca,Na)₁₅(Al,Fe³⁺)(CaxAs³⁺₁-x)(Si,As₅+)Si₆B₃(O,F)₄₈
ElementsY, Ca, Na, Al, Fe, As, Si, B, O, F
Crystal systemTrigonal
Mohs hardness—
Density—
Streak—
Color—
IMA symbolHhm-Y
Nickel–Strunz class9.AJ.35

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

🌍 Where it's found

Type locality (where it was first described): Hundholmen, Tysfjord, Norway

  • 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.

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