Meifuite

KFe6(Si7Al)O19(OH)4Cl2
IMA status
  • Approved
IMA symbol
Mf
Also known as
  • Meifuiet

Where it forms, where it's found

Geological setting

Fe-Cu-REE deposit.

Type locality
Yinachang Fe-Cu-REE deposit
  1. Wuding County
  2. Chuxiong
  3. Yunnan
  4. China

25.5472°, 102.2292°

1recorded occurrences
Source · OpenStreetMap

Crystallography

Crystal system
Triclinic
Space group
#2
Cell parameters
a = 22.7773(13) Å · b = 9.5553(5) Å · c = 14.3282(8) Å
Cell angles
α = 99.258(4) ° · β = 136.750(3) ° · γ = 89.899(4) °
Ratio a:b:c
1 : 0.420 : 0.629
Z
2
Crystal structure

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen2315.999367.977
35.36%
26FeIronIron655.845335.070
32.20%
14SiSiliconSilicon728.085196.595
18.89%
17ClChlorineChlorine235.45070.900
6.81%
19KPotassiumPotassium139.09839.098
3.76%
13AlAluminiumAluminium126.98226.982
2.59%
1HHydrogenHydrogen41.0084.032
0.39%
Total1040.654100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From IMA formula

Synonyms

  • Meifuiet

In other languages

German
IMA 2019-101 · Meifuit

Classification

Strunz
10th ed.

9.EC

  • 9SilicatesClass
  • 9.EPhyllosilicatesDivision
  • 9.ECPhyllosilicates with mica sheets, composed of tetrahedral and octahedral netsGroup
  • 9.ECMeifuiteSpecies

Literature, links & citation

Citations
  1. 2020Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) - Newsletter 54. European Journal of Mineralogy, 32 (2) 275-283 doi:10.5194/ejm-32-275-2020 DOI: 10.5194/ejm-32-275-2020
  2. 2021Jin, Shiyun; Li, Xiaochun; Hobbs, Franklin; Guggenheim, Stephen; Xu, And Huifang (2021) Meifuite, a new ferrous phyllosilicate mineral with modulated tetrahedral sheets similar to minnesotaite. Clays and Clay Minerals, 69 (6). 672-687 doi:10.1007/s42860-021-00143-8DOI: 10.1007/s42860-021-00143-8
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Meifuite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/meifuite-54343},
  note      = {Accessed 2026-05-11}
}