IMA mineral species

Macdonaldite

BaCa₄Si₁₆O₃₆(OH)₂·10H₂O

Phyllosilicate mineral.

Macdonaldite specimen — Macdonaldite-356329.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula	BaCa₄Si₁₆O₃₆(OH)₂·10H₂O
Elements	Ba, Ca, Si, O, H
Crystal system	Orthorhombic
Mohs hardness	—
Density	—
Streak	white
Color	—
IMA symbol	Mcd
Nickel–Strunz class	9.EB.05

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

🌍 Where it's found

Type locality (where it was first described): Big Creek, United States · Big Creek, United States · Esquire no. 1 claim, United States · Esquire No. 7 claim, 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.

Learn more

Macdonaldite on Mindat.org
Wikipedia article
Wikidata item Q411794 (source of this page's data – you can correct it there)