Vaniniite

Where it forms, where it's found

Type locality: Falotta
Tinizong (Tinzen)
Surses
Albula Region
Grisons
Switzerland
46.5533°, 9.6469°

1recorded occurrences

Source · OpenStreetMap

Safety & handling

Crystallography

Crystal system: Monoclinic
Space group: P21/c
Cell parameters: a = 8.9856(1) Å · b = 8.9472(1) Å · c = 9.9039(1) Å
Cell angles: β = 94.719(1) °
Ratio a:b:c: 1 : 0.996 : 1.102

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 20 15.999 319.980
32.70%
33AsArsenic Arsenic 4 74.922 299.688
30.63%
25MnManganese Manganese 5 54.938 274.690
28.07%
20CaCalcium Calcium 2 40.078 80.156
8.19%
1HHydrogen Hydrogen 4 1.008 4.032
0.41%
Total 978.546 100.00%
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	20	15.999	319.980	32.70%
33AsArsenic	Arsenic	4	74.922	299.688	30.63%
25MnManganese	Manganese	5	54.938	274.690	28.07%
20CaCalcium	Calcium	2	40.078	80.156	8.19%
1HHydrogen	Hydrogen	4	1.008	4.032	0.41%
	Total	978.546	100.00%

Synonyms

IMA2017-116
Vaniniiet

In other languages

German: IMA 2017-116 · Vaniniit

Classification

Strunz

10th ed.

8.DH.85

8Phosphates, Arsenates, VanadatesClass
8.DPhosphates, etc. with additional anions, with H₂ODivision
8.DHWith large and medium-sized cations, (OH, etc.):RO₄ < 1:1Group
8.DH.85VaniniiteSpecies

Literature, links & citation

Citations

2018Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2018) CNMNC Newsletter No 43, New minerals and nomenclature modifications approved in 2018. Mineralogical Magazine, 82 (3) 779-785 doi:10.1180/mgm.2018.72DOI: 10.1180/mgm.2018.72
2022(2022) Vaniniite. Handbook of Mineralogy. Mineralogical Society of America

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Vaniniite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/vaniniite-52908},
  note      = {Accessed 2026-05-11}
}