Keilhauite
A variety of Titanite
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About Keilhauite
Baltazar Mathias Keilhau
Formula:
(Ca,Y3+)(Ti,Al,Fe3+)[SiO4]O
Name:
The name is for the Norwegian geologist Prof. Baltazar Mathias Keilhau (1797-1858). First found by Weibye in 1841 and sent by him to A. Erdmann who analyzed and first described it. The same mineral was independently described as yttrotitanite by Scheerer (1844).
First Recorded Locality:
An yttrium-bearing titanite with up to 10% Y2O3.
Originally described from Buø, Tromøysund, Arendal, Aust-Agder, Norway by Erdmann (1844).
Originally described from Buø, Tromøysund, Arendal, Aust-Agder, Norway by Erdmann (1844).
Unique Identifiers
Mindat ID:
8069 (as Keilhauite)
3977 (as Titanite)
3977 (as Titanite)
Long-form identifier:
mindat:1:1:8069:5 (as Keilhauite)
mindat:1:1:3977:8 (as Titanite)
mindat:1:1:3977:8 (as Titanite)
Chemistry of Keilhauite
Mindat Formula:
(Ca,Y3+)(Ti,Al,Fe3+)[SiO4]O
Element Weights:
First Recorded Occurrence of Keilhauite
Other Language Names for Keilhauite
German:Keilhauit
Spanish:Keilhauita
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Keilhauite associated with Yttrium-bearing Titanite | (Ca,Y)TiSiO5 |
| 1 photo of Keilhauite associated with K Feldspar | |
| 1 photo of Keilhauite associated with Orthoclase | K(AlSi3O8) |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Keilhauite
mindat.org URL:
https://www.mindat.org/min-8069.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Keilhauite
Reference List:
Scheerer, Th. (1844) Yttro-Titanit, eine neue Mineralspecies. Annalen der Physik und Chemie, 139. 459-462 doi:10.1002/andp.18441391115
Forbes, David (1856) On the Chemical Composition of some Norwegian Minerals. Part II. The Edinburgh New Philosophical Journal, S. 2 Vol. 3. 59-65pp.59-60 - Comments on the morphology of keilhauite
Localities for Keilhauite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Japan | |
| - (n.d.) |
Namibia | |
| Harvard Museum no. 89494 |
Norway | |
| Erdmann (1844) |
| Erdmann (1844) |
USA | |
| George (1972) |
| AmMin 23:149 | |
| Young (1938) | |
|
Arendal, Agder, Norway