Keilhauite

(Ca,Y3+)(Ti,Al,Fe3+)[SiO4]O
Discovered
1841
Also known as
  • Keilhauit
  • Keilhauita
Variety of
Titanite
TitaniteCaTi(SiO4)O

Where it forms, where it's found

Type locality
Feldspar Quarry
  1. Buøya
  2. Arendal
  3. Agder
  4. Norway
3recorded occurrences
Source · OpenStreetMap

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
39YYttriumYttrium188.90688.906
24.17%
8OOxygenOxygen515.99979.995
21.75%
26FeIronIron155.84555.845
15.18%
22TiTitaniumTitanium147.86747.867
13.02%
20CaCalciumCalcium140.07840.078
10.90%
14SiSiliconSilicon128.08528.085
7.64%
13AlAluminiumAluminium126.98226.982
7.34%
Total367.758100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From Mindat formula

Synonyms

  • Keilhauit
  • Keilhauita

Literature, links & citation

Citations
  1. 1844Scheerer, Th. (1844) Yttro-Titanit, eine neue Mineralspecies. Annalen der Physik und Chemie, 139. 459-462 doi:10.1002/andp.18441391115DOI: 10.1002/andp.18441391115
  2. 1844Erdmann, Axel (1844) Undersökning af et nytt, Ytterjords- och Titansyrehaltigt Mineral från Buö, i trakten af Arendal i Norrige. Kungliga Svenska vetenskapsakademiens handlingar, S. 3 Vol. 32-33. 355-361
  3. 1848Weibye, Paul Christian (1848) Beiträge zur topograpischen Mineralogie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde, 22. 465-544
  4. 1856Forbes, David (1856) On the Chemical Composition of some Norwegian Minerals. Part II. The Edinburgh New Philosophical Journal, S. 2 Vol. 3. 59-65
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Keilhauite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/keilhauite-8069},
  note      = {Accessed 2026-05-11}
}