Ferro-katophorite

Where it forms, where it's found

Type locality: Lågendalen
Hedrum
Larvik Commune
Vestfold
Norway

40recorded occurrences

Source · OpenStreetMap

Physical

Lustre: Vitreous

Optical

Luminescence: Nonfluorescent

Crystallography

Crystal system: Monoclinic
Space group: B2/m
Comment: By analogy to other Katophorites

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 24 15.999 383.976
40.59%
26FeIron Iron 4 55.845 223.380
23.61%
14SiSilicon Silicon 7 28.085 196.595
20.78%
13AlAluminium Aluminium 2 26.982 53.964
5.71%
11NaSodium Sodium 2 22.990 45.980
4.86%
20CaCalcium Calcium 1 40.078 40.078
4.24%
1HHydrogen Hydrogen 2 1.008 2.016
0.21%
Total 945.989 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From IMA formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
8OOxygen	Oxygen	24	15.999	383.976	40.59%
26FeIron	Iron	4	55.845	223.380	23.61%
14SiSilicon	Silicon	7	28.085	196.595	20.78%
13AlAluminium	Aluminium	2	26.982	53.964	5.71%
11NaSodium	Sodium	2	22.990	45.980	4.86%
20CaCalcium	Calcium	1	40.078	40.078	4.24%
1HHydrogen	Hydrogen	2	1.008	2.016	0.21%
	Total	945.989	100.00%

Synonyms

Alumino-katophorite
Aluminokatophorit
Aluminokatophorita
Aluminokatophorite
Cataphorit
Cataphorita
Cataphorite
Catoforit
Catoforita
Catoforite
Catophorit
Catophorita
Catophorite
Ferro-katophoriet
Kataphorite
Katophorita

In other languages

German: Ferro-Katophorit
Italian: catoforite · ferro-catoforite · katophorite

Classification

Strunz

10th ed.

9.DE.20

9SilicatesClass
9.DInosilicatesDivision
9.DEInosilicates with 2-periodic double chains, Si₄O₁₁; ClinoamphibolesGroup
9.DE.20Ferro-katophoriteSpecies

Group, growth & confusion

4 members

Literature, links & citation

Citations

1894Brögger, W. C. (1894) Die Eruptivgesteine des Kristianiagebietes. 1. Die Gesteine der Grorudit-Tinguait-Serie. Videnskabsselskabet i Christiania Skrifter - I Mathematisk-naturvidenskabelig klasse Vol. 1894 (4). In commission by Jacob Dybwad p.1-206.
1978Leake, Bernard E. (1978) Nomenclature of amphiboles. American Mineralogist, 63 (11-12) 1023-1052
1997Leake, B. E., Woolley, A. R., Arps, C. E. S., Birch, W. D., Gilbert, M. C., Grice, J. D., Hawthorne, F. C., Kato, A., Kisch, H. J., Krivovochev, V. G., Linthout, K., Laird, J., Mandarino, J. A., Maresch, W. V., Nickel, E.H., Rock, N. M. S., Schumacher, J. C., Smith, D. C., Stephenson, N. C. N., Ungaretti, L., Whittaker, E. J. W., Youzhi, Gou (1997) Nomenclature of amphiboles: report of the Subcommittee on Amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist, 35 (1) 219-246
1998Mandarino, Joseph A. (1998) The Second List of Additions and Corrections to the Glossary of Mineral Species (1995) - The Amphibole Group. The Mineralogical Record, 29 (3) 169-174
2006Hawthorne, F. C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist, 44 (1) 1-21 doi:10.2113/gscanmin.44.1.1DOI: 10.2113/gscanmin.44.1.1

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Ferro-katophorite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/ferro-katophorite-2168},
  note      = {Accessed 2026-05-11}
}