Modraite

Ca19Fe2+Al4(Al6Fe2+2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9
IMA status
  • Approved
  • Pending publication
IMA symbol
Mdt
Also known as
  • IMA2023-108a
  • Modraiet

Where it forms, where it's found

Type locality
Dolinkovský hill
  1. Modra
  2. Pezinok District
  3. Bratislava Region
  4. Slovakia

48.3601°, 17.3146°

1recorded occurrences
Source · OpenStreetMap

Crystallography

Crystal system
Tetragonal
Space group
P4/nnc
Cell parameters
a = 15.559(2) Å · c = 11.804(2) Å

Synonyms

  • IMA2023-108a
  • Modraiet

In other languages

German
Modrait

Classification

Strunz
10th ed.

9.BG.35

  • 9SilicatesClass
  • 9.BSorosilicatesDivision
  • 9.BGSorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordinationGroup
  • 9.BG.35ModraiteSpecies

Group, growth & confusion

Literature, links & citation

Citations
  1. Uher, P., Bačík, P., Rybnikova, O., Wildner, M., Miglierini, M., Libowitzky, E., Škoda, R., Vaculovič, T., Lalinská-Voleková, B., Puškelová, L., Štubňa, J., Kurylo, S. and Mikuš, T. (2024) Modraite, IMA 2023-108a. CNMNC Newsletter 79, Mineralogical Magazine, 88
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Modraite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/modraite-471108},
  note      = {Accessed 2026-05-11}
}