Where it forms, where it's found
- Geological setting
Metasedimentary Fe-Mn ore.
- Type locality
- Mt Kannan
- Ouzu City
- Ehime Prefecture
- Japan
33.5172°, 132.6325°
1recorded occurrences
Physical
Optical
- Pleochroism
- Weak
orange to brownish-orange.
- UV response
- None
- Notes
the mean refractive index obtained from the Gladstone–Dale relationship using the empirical formula and calculated density is 1.788.
Crystallography
- Space group
- Pmmn
- Cell parameters
- a = 8.881(1) Å · b = 5.992(1) Å · c = 18.879(2) Å
- Ratio a:b:c
- 1 : 0.675 : 2.126
- Unit cell volume
- 1004.7 ų
- Type-locality form
Grains to 15 µm
- Comment
unit cell parameters as refined from the powder data
Chemical composition
Synonyms
- IMA2015-100
- Kannaniet
In other languages
- German
- IMA 2015-100 · Kannanit
Classification
Strunz
10th ed.9.BJ.40
- 9SilicatesClass
- 9.BSorosilicatesDivision
- 9.BJSorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordinationGroup
- 9.BJ.40KannaniteSpecies
Group, growth & confusion
Literature, links & citation
Citations
- 2016Nishio-Hamane, D.; Minakawa, T. (2016) 神南石 [Jinnan stone]. https://web.archive.org/web/20160518104737/http://www.issp.u-tokyo.ac.jp/labs/mdcl/lab/denken/wordpress/?page_id=2044
- 2016www.issp.u-tokyo.ac.jp (2016) http://www.issp.u-tokyo.ac.jp/labs/mdcl/lab/denken/wordpress/?page_id=2044
- 2016Hålenius, U., Hatert, F., Pasero, M., Mills, S.J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter no 30. Mineralogical Magazine, 80 (2) 407-413 doi:10.1180/minmag.2016.080.081DOI: 10.1180/minmag.2016.080.081
- 2018Nishio–Hamane, Daisuke, Nagashima, Mariko, Ogawa, Nobuhiro, Minakawa, Tetsuo (2018) Kannanite, a new mineral from Kannan Mountain, Japan. Journal of Mineralogical and Petrological Sciences, 113 (5) 245-250 doi:10.2465/jmps.180103 DOI: 10.2465/jmps.180103
- 2020(2020) Kannanite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Kannanite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/kannanite-46922},
note = {Accessed 2026-05-11}
}