Hedegaardite

(Ca,Na)9(Ca,Na)Mg(PO4)6(PO3OH)
IMA status
  • Approved
  • Pending publication
IMA symbol
Hed
IMA approved
2014
Also known as
  • Hedegaardiet
  • IMA2014-069

Where it forms, where it's found

Type locality
Lobos Mine
  1. Punta de Lobos
  2. Iquique
  3. Iquique Province
  4. Tarapacá
  5. Chile

-21.2000°, -70.0833°

2recorded occurrences
Source · OpenStreetMap

Crystallography

Crystal system
Trigonal
Space group
#85
Cell parameters
a = 10.3519(9) Å · c = 37.064(5) Å

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen2815.999447.972
33.92%
20CaCalciumCalcium1040.078400.780
30.34%
11NaSodiumSodium1022.990229.900
17.41%
15PPhosphorusPhosphorus730.974216.818
16.41%
12MgMagnesiumMagnesium124.30524.305
1.84%
1HHydrogenHydrogen11.0081.008
0.08%
Total1320.783100.00%

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

From IMA formula

Synonyms

  • Hedegaardiet
  • IMA2014-069

In other languages

German
Hedegaardit · IMA 2014-069
Italian
hedegaardite

Classification

Strunz
10th ed.

8.AC.25

  • 8Phosphates, Arsenates, VanadatesClass
  • 8.APhosphates, etc. without additional anions, without H2ODivision
  • 8.ACWith medium-sized and large cationsGroup
  • 8.AC.25HedegaarditeSpecies

Group, growth & confusion

In the same group
3 members

Literature, links & citation

Citations
  1. 2015Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2014 and 2015. Newsletter No 23. Mineralogical Magazine, 79 (1) 51-58 doi:10.1180/minmag.2015.079.1.05DOI: 10.1180/minmag.2015.079.1.05
  2. 2022(2022) Hedegaardite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Hedegaardite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/hedegaardite-46508},
  note      = {Accessed 2026-05-11}
}