Crystopedia
IMA mineral species

Ashcroftine-(Y)

K₅Na₅Y₁₂Si₂₈O₇₀(OH)₂(CO₃)₈·8H₂O

Double chain inosilicate.

Pink

Ashcroftine-(Y) specimen
Ashcroftine-(Y)-531183.jpg · Wikimedia Commons (see file page for author & license)

Properties

🔷 Tetragonal
Chemical formulaK₅Na₅Y₁₂Si₂₈O₇₀(OH)₂(CO₃)₈·8H₂O
ElementsK, Na, Y, Si, O, H, C
Crystal systemTetragonal
Mohs hardness—
Density—
Streak—
Color—
IMA symbolAcf-Y
Nickel–Strunz class9.DN.15

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

🌍 Where it's found

Type locality (where it was first described): Narsaarsuk pegmatite, Greenland

  • 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