Macivorite

(NH4)3Al5(PO3OH)6(PO4)2·18H2O
IMA status
  • Approved
  • Pending publication
IMA symbol
Mvr
Also known as
  • IMA2024-083
  • Macivoriet

Where it forms, where it's found

Type locality
Skipton Caves
  1. Mount Widderin
  2. Skipton
  3. Corangamite Shire
  4. Victoria
  5. Australia

-37.7370°, 143.3478°

1recorded occurrences
Source · OpenStreetMap

Crystallography

Crystal system
Trigonal
Space group
#98
Cell parameters
a = 8.785(1) Å · c = 95.207(7) Å

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen5015.999799.950
62.54%
15PPhosphorusPhosphorus830.974247.792
19.37%
13AlAluminiumAluminium526.982134.910
10.55%
1HHydrogenHydrogen541.00854.432
4.26%
7NNitrogenNitrogen314.00742.021
3.28%
Total1279.105100.00%

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

From Mindat formula

Synonyms

  • IMA2024-083
  • Macivoriet

In other languages

German
IMA 2024-083 · Macivorit

Classification

Strunz
10th ed.

8.CH.25

  • 8Phosphates, Arsenates, VanadatesClass
  • 8.CPhosphates without additional anions, with H2ODivision
  • 8.CHWith large and medium-sized cations, RO4:H2O < 1:1Group
  • 8.CH.25MacivoriteSpecies

Literature, links & citation

Citations
  1. 2025Bosi, Ferdinando; Hatert, Frédéric; Pasero, Marco; Mills, Stuart J. (2025) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 84. European Journal of Mineralogy, 37 (2). 249-255 doi:10.5194/ejm-37-249-2025 DOI: 10.5194/ejm-37-249-2025
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Macivorite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/macivorite-471962},
  note      = {Accessed 2026-05-11}
}