Fluoro-pedrizite

Where it forms, where it's found

Type locality: Tastyg Spodumene deposit
Erzinsky District
Tuva
Russia
49.8797°, 97.2397°

1recorded occurrences

Source · OpenStreetMap

Crystallography

Crystal system: Monoclinic
Space group: #11
Cell parameters: a = 9.357 Å · b = 17.58 Å · c = 5.267 Å
Cell angles: β = 102.37 °
Ratio a:b:c: 1 : 1.879 : 0.563

Crystal structure

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 22 15.999 351.978
46.25%
14SiSilicon Silicon 8 28.085 224.680
29.52%
13AlAluminium Aluminium 2 26.982 53.964
7.09%
12MgMagnesium Magnesium 2 24.305 48.610
6.39%
9FFluorine Fluorine 2 18.998 37.996
4.99%
11NaSodium Sodium 1 22.990 22.990
3.02%
3LiLithium Lithium 3 6.940 20.820
2.74%
Total 761.038 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
8OOxygen	Oxygen	22	15.999	351.978	46.25%
14SiSilicon	Silicon	8	28.085	224.680	29.52%
13AlAluminium	Aluminium	2	26.982	53.964	7.09%
12MgMagnesium	Magnesium	2	24.305	48.610	6.39%
9FFluorine	Fluorine	2	18.998	37.996	4.99%
11NaSodium	Sodium	1	22.990	22.990	3.02%
3LiLithium	Lithium	3	6.940	20.820	2.74%
	Total	761.038	100.00%

Synonyms

Fluoro-Natriumpedrizit
Fluoro-sodic-pedrizite
IMA2004-002

In other languages

German: Fluoro-Pedrizit · IMA 2004-002
Italian: fluoro-pedrizite · fluoro-sodic-pedrizite

Classification

Strunz

10th ed.

9.DE.25

9SilicatesClass
9.DInosilicatesDivision
9.DEInosilicates with 2-periodic double chains, Si₄O₁₁; ClinoamphibolesGroup
9.DE.25Fluoro-pedriziteSpecies

Group, growth & confusion

4 members

Literature, links & citation

Citations

1965Ginzburg, I.V. (1965) Holmquistite and its structural variety clinoholmquistite. Trudy Mineral. Muzeya Akad. Nauk SSSR: 16: 73-89 (in Russian).
2005Oberti, R. (2005) Clinoholmquistite discredited: The new amphibole end-member fluoro-sodic-pedrizite. American Mineralogist, 90 (4) 732-736 doi:10.2138/am.2005.1763 DOI: 10.2138/am.2005.1763
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
2012Hawthorne, F. C., Oberti, R., Harlow, G. E., Maresch, W. V., Martin, R. F., Schumacher, J. C., Welch, M. D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist, 97 (11) 2031-2048 doi:10.2138/am.2012.4276 DOI: 10.2138/am.2012.4276

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Fluoro-pedrizite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/fluoro-pedrizite-27451},
  note      = {Accessed 2026-05-11}
}