Aluminoceladonite

K(Mg,Fe2+)Al(Si4O10)(OH)2
IMA status
  • Approved
IMA symbol
Acel
IMA approved
1998
Also known as
  • Aluminoceladoniet
  • Aluminoceladonitt
  • Leucophyllit
  • +4 more

Where it forms, where it's found

Type locality
Frohsdorf
  1. Lanzenkirchen
  2. Wiener Neustadt-Land District
  3. Lower Austria
  4. Austria

47.7463°, 16.2542°

23recorded occurrences
Source · OpenStreetMap

Physical

Colour
Colorless when pure · grass-green when Fe(II)-bearing

Crystallography

Crystal system
Monoclinic
Space group
C2/m
Cell parameters
a = 5.2141(5) Å · b = 9.0082(7) Å · c = 10.108(1) Å
Cell angles
β = 101.12(2) °
Ratio a:b:c
1 : 1.728 : 1.939
Comment

Twin Creek formation, Wyoming

Crystal structure

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen1215.999191.988
42.42%
14SiSiliconSilicon428.085112.340
24.82%
26FeIronIron155.84555.845
12.34%
19KPotassiumPotassium139.09839.098
8.64%
13AlAluminiumAluminium126.98226.982
5.96%
12MgMagnesiumMagnesium124.30524.305
5.37%
1HHydrogenHydrogen21.0082.016
0.45%
Total452.574100.00%

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

From IMA formula

Synonyms

  • Aluminoceladoniet
  • Aluminoceladonitt
  • Leucophyllit
  • Leucophyllite
  • Leukophyllite
  • Mg-Al Celadonite
  • Mg-Al Seladonit

In other languages

French
Aluminocéladonite
German
Aluminoseladonit · Leucophyllit · Leukophyllit
Spanish
Aluminoceladonita
Italian
aluminoceladonite

Classification

Strunz
10th ed.

9.EC.15

  • 9SilicatesClass
  • 9.EPhyllosilicatesDivision
  • 9.ECPhyllosilicates with mica sheets, composed of tetrahedral and octahedral netsGroup
  • 9.EC.15AluminoceladoniteSpecies

Group, growth & confusion

In the same group
5 members
Commonly confused with
4 minerals

Literature, links & citation

Citations
  1. 1972Vendel, M. (1972) Über die Genese der "Leukophyllite". TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 17 (2) 76-100 doi:10.1007/bf01081453DOI: 10.1007/bf01081453
  2. 1997Pavese, Alessandro, Ferraris, Giovanni, Prencipe, Mauro, Ibberson, Richard (1997) Cation site ordering in phengite 3T from the Dora-Maira massif (western Alps): a variable-temperature neutron powder diffraction study. European Journal of Mineralogy, 9 (6) 1183-1190 doi:10.1127/ejm/9/6/1183DOI: 10.1127/ejm/9/6/1183
  3. 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
  4. 2009Murao, R., Yubuta, K., Miyawaki, R. and Sugiyama, K. (2009): Analysis of aluminoceladonite included in green heulandite. JAKOKA: 2009 Annual Meeting of the Japan Association of Mineralogical Sciences, abs. R4-11, p. 105.
  5. 2010Drits, V. A., Zviagina, B. B., McCarty, D. K., Salyn, A. L. (2010) Factors responsible for crystal-chemical variations in the solid solutions from illite to aluminoceladonite and from glauconite to celadonite. American Mineralogist, 95 (2) 348-361 doi:10.2138/am.2010.3300 DOI: 10.2138/am.2010.3300
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Aluminoceladonite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/aluminoceladonite-6795},
  note      = {Accessed 2026-05-11}
}