Where it forms, where it's found
- Geological setting
Formed in melt pockets in corundum-aggregate xenoliths derived from the upper mantle beneath Mount Carmel, Israel. This association forms pseudomorphs and appears to reflect the oxidation breakdown of carmeltazite.
- Type locality
- Mount Carmel
- Kishon Mid Reach zone 2
- Kishon river
- Haifa District
- Israel
32.7333°, 35.0500°
2recorded occurrences
Physical
- Transparency
- Transparent
Crystallography
- Space group
- Cmcm
- Cell parameters
- a = 3.58(2) Å · b = 9.44(1) Å · c = 9.65(1) Å
- Ratio a:b:c
- 1 : 2.637 : 2.696
- Z
- 4
- Type-locality form
As inclusions within corundum xenocrysts. subhedral crystals, ~1–4 μm in size.
Chemical composition
Synonyms
- Griffiniet
- IMA2021-110
- Unnamed (Al-analogue of Pseudobrookite)
In other languages
- German
- Griffinit · IMA 2021-110
- Russian
- гриффинит
Classification
Strunz
10th ed.4.CB.15
- 4OxidesClass
- 4.CMetal: Oxygen = 2: 3,3: 5, and similarDivision
- 4.CBWith medium-sized cationsGroup
- 4.CB.15GriffiniteSpecies
Group, growth & confusion
Literature, links & citation
Citations
- 1953Austin, A. E., Schwartz, C. M. (1953) The crystal structure of aluminium titanate. Acta Crystallographica, 6 (10) 812-813 doi:10.1107/s0365110x53002374DOI: 10.1107/s0365110x53002374
- 1958Hamelin, M. (1958): The structure of the composition, TiO2.Al2O3, in comparison with the pseudo-brookite. Bulletin de la Société Chimique de France, 1958, 1559-1566. (In French.)
- 1968Goldberg, D. (1968): Contribution a l'étude des systèmes formée par l'alumine avec quelques oxydes de métaux trivalents et tétravalents, en particulier, l'oxyde de titane. Revue Internationale des Hautes Températures et des Réfractaires, 5, 181-94. (in French)
- 1971Bayer, G. (1971) Thermal expansion characteristics and stability of pseudobrookite-type compounds, Me3O5. Journal of the Less Common Metals, 24 (2). 129-138 doi:10.1016/0022-5088(71)90091-9DOI: 10.1016/0022-5088(71)90091-9
- 1972Morosin, B., Lynch, R. W. (1972) Structure studies on Al2TiO5 at room temperature and at 600°C. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 28 (4) 1040-1046 doi:10.1107/s0567740872003681DOI: 10.1107/s0567740872003681
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Griffinite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/griffinite-55971},
note = {Accessed 2026-05-11}
}