IMA mineral species

Montgomeryite

Ca₄MgAl₄(PO₄)₆(OH)₄ * 12H₂O

Phosphate mineral.

Montgomeryite specimen
Montgomeryite13278-1.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formulaCa₄MgAl₄(PO₄)₆(OH)₄ * 12H₂O
ElementsCa, Mg, Al, P, O, H
Crystal systemMonoclinic
Mohs hardness—
Density—
Streak—
Color—
IMA symbolMgm
Nickel–Strunz class8.DH.25

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

🌍 Where it's found

Type locality (where it was first described): Clay canyon, Fairfield, United States

  • 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.