Vanadoakasakaite-(Ce)

(CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH)
IMA status
  • Approved
IMA symbol
Vak-Ce
Also known as
  • IMA2024-044
  • Vanadoakasakaiet-(Ce)

Where it forms, where it's found

Geological setting

occur in association with small quartz lenses within rhodonite–rich rocks and do not contact other V–containing minerals

Type locality
Mogurazawa mine
  1. Kiryu City
  2. Gunma Prefecture
  3. Japan

36.4397°, 139.3831°

1recorded occurrences
Source · OpenStreetMap

Physical

Colour
dark brown
Density
4.178 g/cm³

Crystallography

Crystal system
Monoclinic
Space group
P21/m
Cell parameters
a = 8.9089(3) Å · b = 5.7390(2) Å · c = 10.1212(4) Å
Cell angles
β = 113.616(4) °
Ratio a:b:c
1 : 0.644 : 1.136
Z
2
Type-locality form

Euhedral to subhedral prismatic crystals elongated parallel to [010] are the most common form. The crystals range in length from a few micrometers to 1 mm.

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen1315.999207.987
34.30%
58CeCeriumCerium1140.116140.116
23.11%
14SiSiliconSilicon328.08584.255
13.90%
25MnManganeseManganese154.93854.938
9.06%
23VVanadiumVanadium150.94250.942
8.40%
20CaCalciumCalcium140.07840.078
6.61%
13AlAluminiumAluminium126.98226.982
4.45%
1HHydrogenHydrogen11.0081.008
0.17%
Total606.306100.00%

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

From Mindat formula

Synonyms

  • IMA2024-044
  • Vanadoakasakaiet-(Ce)

In other languages

German
IMA 2024-044 · Vanadoakasakait-(Ce)

Classification

Strunz
10th ed.

9.BG.05b

  • 9SilicatesClass
  • 9.BSorosilicatesDivision
  • 9.BGSorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordinationGroup
  • 9.BG.05bVanadoakasakaite-(Ce)Species

Group, growth & confusion

Literature, links & citation

Citations
  1. 2026Nagashima, Mariko; Nishio-Hamane, Daisuke; Ohnishi, Masayuki; Miyajima, Hiroshi; Harada, Akira (2026) New epidote-supergroup minerals from the Mogurazawa mine, Gunma, Japan: akasakaite-(Ce), akasakaite-(La), vanadoakasakaite-(Ce), and vanadoakasakaite-(La). Journal of Mineralogical and Petrological Sciences, 121 (1). 250927
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Vanadoakasakaite-(Ce) — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/vanadoakasakaite-ce-471482},
  note      = {Accessed 2026-05-11}
}