Tetraferriphlogopite

Where it forms, where it's found

Type locality: Kovdor Zheleznyi Mine
Kovdor Massif
Kovdorsky District
Murmansk Oblast
Russia
67.5597°, 30.4258°

66recorded occurrences

Source · OpenStreetMap

Crystallography

Crystal system: Monoclinic
Space group: C2/m
Cell parameters: a = 5.362 Å · b = 9.288 Å · c = 10.321 Å
Cell angles: β = 99.99 °
Ratio a:b:c: 1 : 1.732 : 1.925
Comment: 1M polytype

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 12 15.999 191.988
43.04%
14SiSilicon Silicon 3 28.085 84.255
18.89%
12MgMagnesium Magnesium 3 24.305 72.915
16.34%
26FeIron Iron 1 55.845 55.845
12.52%
19KPotassium Potassium 1 39.098 39.098
8.76%
1HHydrogen Hydrogen 2 1.008 2.016
0.45%
Total 446.117 100.00%
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	12	15.999	191.988	43.04%
14SiSilicon	Silicon	3	28.085	84.255	18.89%
12MgMagnesium	Magnesium	3	24.305	72.915	16.34%
26FeIron	Iron	1	55.845	55.845	12.52%
19KPotassium	Potassium	1	39.098	39.098	8.76%
1HHydrogen	Hydrogen	2	1.008	2.016	0.45%
	Total	446.117	100.00%

Synonyms

Tetraferriphlogopiet
Tetraferriphlogopita

In other languages

German: Tetraferriphlogopit
Italian: Tetra-ferriphlogopite · Tetraferriflogopite · Tetraferriphlogopite

Classification

Strunz

10th ed.

9.EC.20

9SilicatesClass
9.EPhyllosilicatesDivision
9.ECPhyllosilicates with mica sheets, composed of tetrahedral and octahedral netsGroup
9.EC.20TetraferriphlogopiteSpecies

Group, growth & confusion

9 members

1 mineral

FluorotetraferriphlogopiteKMg₃Fe³⁺Si₃O₁₀F₂
Mineral
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Literature, links & citation

Citations

1925Wahl, W. (1925) Die Gesteine des Wiborger Rapakiwigebietes [The rocks of the Vyborg Rapakivi area]. Fennia Vol. 45 (20). Geographical Society of Finland p.1-126.
1977Semenova, T.F., Rozhdestvenskaya, I.V., Frank-Kamenetskii, V.A. (1977) Refinement of the crystal structure of tetraferriphlogopite. Soviet Physics - Crystallography, 22, 680-683.
1996Brigatti, Maria Franca (1996) Refinement of the Structure of Natural Ferriphlogopite. Clays and Clay Minerals, 44 (4) 540-545 doi:10.1346/ccmn.1996.0440413DOI: 10.1346/ccmn.1996.0440413
1997Jambor, John L.; Pertsev, Nikolai N.; Roberts, Andrew C. (1997) New Mineral Names. American Mineralogist, 82 (3-4). 430-433
1998Rieder, M., Cavazzini, G., D’Yakonov, Y.S., Frank-Kamenetskii, V.A., Gottardt, G., Guggenheim, S., Koval, P.V., Muller, G., Neiva, A.M.R., Radoslovich, E.W., Robert, J.L., Sassi, F.P., Takeda, H., Weiss, Z., Wones, D.R. (1998) Nomenclature of the micas. The Canadian Mineralogist, 36 (3) 905-912

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Tetraferriphlogopite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/tetraferriphlogopite-3922},
  note      = {Accessed 2026-05-11}
}