Tsangpoite

Ca5(PO4)2(SiO4)
IMA status
  • Approved
IMA symbol
Tpo
IMA approved
2015
Also known as
  • IMA2014-110
  • Tsangpoiet

Where it forms, where it's found

Geological setting

angrite meteorite

Type locality
D'Orbigny meteorite
  1. D'Orbigny
  2. Coronel Suaréz
  3. Buenos Aires Province
  4. Argentina

-37.6667°, -61.6497°

3recorded occurrences
Source · OpenStreetMap

Crystallography

Crystal system
Hexagonal
Cell parameters
a = 9.489(4) Å · c = 6.991(6) Å
Z
2
Type-locality form

Rod-like tsangpoite (Tsa) crystals with characteristic hexagonal cross section are typically < 30 μm in length and 1-15 μm in width.

Comment

space group P63/m or P63

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
20CaCalciumCalcium540.078200.390
41.54%
8OOxygenOxygen1215.999191.988
39.80%
15PPhosphorusPhosphorus230.97461.948
12.84%
14SiSiliconSilicon128.08528.085
5.82%
Total482.411100.00%

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

From IMA formula

Synonyms

  • IMA2014-110
  • Tsangpoiet

In other languages

German
IMA 2014-110 · Tsangpoit
Italian
tsangpoite

Classification

Strunz
10th ed.

9.AH.65

  • 9SilicatesClass
  • 9.ANesosilicatesDivision
  • 9.AHNesosilicates with CO3, SO4, PO4, etc.Group
  • 9.AH.65TsangpoiteSpecies

Group, growth & confusion

Commonly confused with
1 mineral

Literature, links & citation

Citations
  1. 2015Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2015, CNMNC Newsletter No 25. Mineralogical Magazine, 79 (3) 529-535 doi:10.1180/minmag.2015.079.3.02DOI: 10.1180/minmag.2015.079.3.02
  2. 2016Hwang, S.-L., Shen, P., Chu, H.-T., Yui, T.-F., Varela, M.E., Iizuka, Y. (2016) Tsangpoite: The Unknown Calcium Silico Phosphate Phase in the Angrite D'Orbigny. Lunar and Planetary Science Conference: 47: 1466.
  3. 2019Hwang, Shyh-Lung, Shen, Pouyan, Chu, Hao-Tsu, Yui, Tzen-Fu, Varela, Maria-Euginia, Iizuka, Yoshiyuki (2019) New minerals tsangpoite Ca5(PO4)2(SiO4) and matyhite Ca9(Ca0.5□0.5)Fe(PO4)7 from the D'Orbigny angrite. Mineralogical Magazine, 83 (2) 293-313 doi:10.1180/mgm.2018.125DOI: 10.1180/mgm.2018.125
  4. 2022(2022) Tsangpoite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Tsangpoite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/tsangpoite-46625},
  note      = {Accessed 2026-05-11}
}