Kozłowskiite

Where it forms, where it's found

Geological setting: Pegmatite of the Karkonosze granite, Szklarska Poręba Huta quarry.
Type locality: Szklarska Poręba Huta granite quarry
Szklarska Poręba
Karkonosze County
Lower Silesian Voivodeship
Poland
50.8269°, 15.4946°

1recorded occurrences

Source · OpenStreetMap

Physical

Colour: Pale brownish (in tiny pieces)
Density: 3.775 g/cm³

Optical

Principal indices: n ~1.727

Crystallography

Crystal system: Triclinic
Cell parameters: a = 10.0183(2) Å · b = 8.3861(1) Å · c = 13.3395(2) Å
Cell angles: α = 89.956(1) ° · β = 109.039(2) ° · γ = 89.979(1) °
Ratio a:b:c: 1 : 0.837 : 1.332
Unit cell volume: 1059.4 Å³
Type-locality form: A core band in a zoned silesiaite–kristiansenite crystal.
Comment: the space group is C1; pseudomonoclinic, i.e., "metrically monoclinic (Laue group 2/m)", α=γ=90°, a = 10.0170(3), b = 8.3860(2), c = 13.3421(4) Å, β = 109.050(3)°, V = 1059.40(5) Å3

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 28 15.999 447.972
35.92%
50SnTin Tin 3 118.710 356.130
28.56%
14SiSilicon Silicon 8 28.085 224.680
18.02%
20CaCalcium Calcium 4 40.078 160.312
12.86%
26FeIron Iron 1 55.845 55.845
4.48%
1HHydrogen Hydrogen 2 1.008 2.016
0.16%
Total 1246.955 100.00%
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	28	15.999	447.972	35.92%
50SnTin	Tin	3	118.710	356.130	28.56%
14SiSilicon	Silicon	8	28.085	224.680	18.02%
20CaCalcium	Calcium	4	40.078	160.312	12.86%
26FeIron	Iron	1	55.845	55.845	4.48%
1HHydrogen	Hydrogen	2	1.008	2.016	0.16%
	Total	1246.955	100.00%

Synonyms

IMA2021-081
Kozłowskiiet

In other languages

German: IMA 2021-081 · Kozłowskiit

Classification

Strunz

10th ed.

9.BC

9SilicatesClass
9.BSorosilicatesDivision
9.BCSi₂O₇ groups, without non-tetrahedral anions; cations in octahedral [6] and greater coordinationGroup
9.BCKozłowskiiteSpecies

Group, growth & confusion

3 members

2 minerals

Literature, links & citation

Citations

—Szklarska Poręba Huta quarry, Lower Silesia, Poland
2022(2022) Kozłowskiite. Handbook of Mineralogy. Mineralogical Society of America
2022Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 65. European Journal of Mineralogy, 34 (1) 143-148 doi:10.5194/ejm-34-143-2022 DOI: 10.5194/ejm-34-143-2022
2022Pieczka, Adam, Zelek-Pogudz, Sylwia, Gołębiowska, Bożena, Stadnicka, Katarzyna M., Evans, R. James (2022) Kozłowskiite, ideally Ca₄Fe²⁺Sn₃(Si₂O₇)₂(Si₂O₆OH)₂, a new kristiansenite-type mineral from Szklarska Poręba, Lower Silesia, Poland. Mineralogical Magazine, 86 (3) 507-517 doi:10.1180/mgm.2022.50DOI: 10.1180/mgm.2022.50
2022Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 70. European Journal of Mineralogy, 34 (6) 591-601 doi:10.5194/ejm-34-591-2022 DOI: 10.5194/ejm-34-591-2022

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Kozłowskiite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/koz-owskiite-55754},
  note      = {Accessed 2026-05-11}
}