IMA mineral species
Modraite
Ca₁₉Fe²⁺(Al₁₁Fe²⁺)(SiO₄)₁₀(Si₂O₇)₄O(OH)₉
Properties
| Chemical formula | Ca₁₉Fe²⁺(Al₁₁Fe²⁺)(SiO₄)₁₀(Si₂O₇)₄O(OH)₉ |
|---|---|
| Elements | Ca, Fe, Al, Si, O, H |
| Crystal system | Tetragonal |
| Mohs hardness | — |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Mdt |
| Nickel–Strunz class | 9.BG.35 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
🌍 Where it's found
Type locality (where it was first described): Modra, Slovakia
- 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
- Modraite on Mindat.org
- Wikidata item Q127419596 (source of this page's data – you can correct it there)
IMA mineral species
Tetragonal