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About FarringtoniteHide

Colorless, white, pale yellow to amber yellow
Specific Gravity:
Crystal System:
Named by E. R. DuFresne and S. K. Roy in 1961 in honor of Oliver Cummings Farrington [1864 Brewer, ME, USA - 1935 Chicago, IL, USA], mineralogist and specialist in meteorites, curator of Geology, Field Museum, Chicago, IL, USA.
Dimorph of:
This page provides mineralogical data about Farringtonite.

Classification of FarringtoniteHide


A : Phosphates, etc. without additional anions, without H2O
B : With medium-sized cations
Dana 7th ed.:

3 : (AB)3(XO4)2

19 : Phosphates
3 : Phosphates of Be and Mg

Pronounciation of FarringtoniteHide

PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of FarringtoniteHide

Transparent, Translucent
Colorless, white, pale yellow to amber yellow
2.74 g/cm3 (Measured)    2.76 g/cm3 (Calculated)

Optical Data of FarringtoniteHide

Biaxial (+)
RI values:
nα = 1.540 nβ = 1.544 nγ = 1.559
Measured: 47° to 55°, Calculated: 56°
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r < v
Optical Extinction:
Z ^ c = 16°

Chemical Properties of FarringtoniteHide


Crystallography of FarringtoniteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 7.600 Å, b = 8.236 Å, c = 5.076 Å
β = 94.06°
a:b:c = 0.923 : 1 : 0.616
Unit Cell V:
316.93 ų (Calculated from Unit Cell)
P21/n; Acta Chemica Scandanivica 22:1466 (1968) structure

X-Ray Powder DiffractionHide

Powder Diffraction Data:
4.36 (30)
4.31 (20)
4.12 (30)
4.08 (30)
3.85 (80)
3.66 (30)
3.44 (100)
2.41 (30)
ICDD 33-876 synthetic

Type Occurrence of FarringtoniteHide

Other Language Names for FarringtoniteHide

Simplified Chinese:磷镁石
Traditional Chinese:磷鎂石

Related Minerals - Nickel-Strunz GroupingHide

8.AB.BorisenkoiteCu3[(V,As)O4]2Mon. 2/m : P21/b
8.AB.10Heterosite(Fe3+,Mn3+)PO4Orth. mmm (2/m 2/m 2/m) : Pmna
8.AB.10LithiophiliteLiMn2+PO4Orth. mmm (2/m 2/m 2/m) : Pmna
8.AB.10NatrophiliteNaMn2+PO4Orth. mmm (2/m 2/m 2/m) : Pmna
8.AB.10Purpurite(Mn3+,Fe3+)PO4Orth. mmm (2/m 2/m 2/m) : Pmna
8.AB.10TriphyliteLiFe2+PO4Orth. mmm (2/m 2/m 2/m) : Pmna
8.AB.10KarenwebberiteNa(Fe2+,Mn2+)PO4Orth. mmm (2/m 2/m 2/m) : Pnma
8.AB.15Sarcopside(Fe2+,Mn2+,Mg)3(PO4)2Mon. 2/m : P21/b
8.AB.15Chopinite(Mg,Fe2+)3(PO4)2Mon. 2/m : P21/b
8.AB.20BeusiteMn2+Mn2+2 (PO4)2Mon.
8.AB.20GraftoniteFe2+Fe2+2(PO4)2Mon. 2/m : P21/b
8.AB.25XanthiositeNi3(AsO4)2Mon. 2/m : P21/b
8.AB.30Lammerite-βCu3(AsO4)2Mon. 2/m : P21/b
8.AB.35StranskiiteZn2Cu(AsO4)2Tric. 1 : P1
8.AB.35PseudolyonsiteCu3(VO4)2Mon. 2/m : P21/b

Related Minerals - Dana Grouping (8th Ed.)Hide,Mn2+,Mg)3(PO4)2Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.3.1MoraesiteBe2(PO4)(OH) · 4H2OMon.
19.3.2BerylloniteNaBePO4Mon. 2/m : P21/b
19.3.4HydroxylherderiteCaBe(PO4)(OH,F)Mon. 2/m : P21/b
19.3.5GlucineCaBe4(PO4)2(OH)4 · 0.5H2O
19.3.6FransoletiteCa3Be2(PO4)2(HPO4)2 · 4H2OMon.
19.3.7UraloliteCa2Be4(PO4)3(OH)3 · 5H2OMon.
19.3.9PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2OIso. 2 3 : I2 3
19.3.10TiptopiteK2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2OHex.
19.3.11GainesiteNa(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2OTet. 4mm : I41md
19.3.12RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/m
19.3.13FaheyiteBe2Mn2+Fe3+2(PO4)4 · 6H2OTrig. 3 2 : P31 2 1
19.3.15HoltedahliteMg2(PO4)(OH)Trig. 3m : P3 1m
19.3.16AlthausiteMg4(PO4)2(OH,O)(F,☐)Orth. mmm (2/m 2/m 2/m) : Pnma
19.3.17NewberyiteMg(HPO4) · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbca
19.3.18PhosphorrössleriteMg(HPO4) · 7H2OMon. 2/m : P2/b
19.3.19BobierriteMg3(PO4)2 · 8H2OMon. 2/m : B2/b
19.3.20Barićite(Mg,Fe)3(PO4)2 · 8H2OMon. 2/m : B2/m
19.3.21Panethite(Na,Ca)2(Mg,Fe2+)2(PO4)2Mon. 2/m : P21/b
19.3.22Dittmarite(NH4)Mg(PO4) · H2OOrth.
19.3.23Struvite(NH4)Mg(PO4) · 6H2OOrth. mm2
19.3.24Hannayite(NH4)2Mg3H4(PO4)4 · 8H2OTric. 1 : P1

Other InformationHide

Hydrates in the atmosphere and disintegrates to a powder
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for FarringtoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
DUFRESNE, E.R. & ROY, S.K. (1961): A new phosphate mineral from the Springwater pallasite. Geochimica et Cosmochimica Acta 24, 198-205.
FUCHS, L.H., OLSEN, E. & GEBERT, E. (1973): New X-ray and compositional data for farringtonite, Mg3(PO4)2. American Mineralogist 58, 949-951.
NORD, A.G. & KIERKEGAARD, P. (1968): The crystal structure of Mg3(PO4)2. Acta Chemica Scandinavica 22, 1466-1474.

Internet Links for FarringtoniteHide

Localities for FarringtoniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada (TL)
  • Saskatchewan
    • Springwater
DUFRESNE, E.R. & ROY, S.K. (1961): A new phosphate mineral from the Springwater pallasite. Geochimica et Cosmochimica Acta 24, 198-205. FUCHS, L.H., OLSEN, E. & GEBERT, E. (1973): New X-ray and compositional data for farringtonite, Mg3(PO4)2. American Mineralogist 58, 949-951. NORD, A.G. & KIERKEGAARD, P. (1968): The crystal structure of Mg3(PO4)2. Acta Chemica Scandinavica 22, 1466-1474.
  • Yukon
    • Whitehorse mining district
      • Carcross
        • Tagish Lake
Lunar and Planetary Science XXXII (2001)
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
Bild, R. W. (1974). New occurrences of phosphates in iron meteorites. Contributions to Mineralogy and Petrology, 45(2), 91-98.
  • Anhui Province
    • Tongling Prefecture
      • Tongguanshan ore field
Cen Kuang and Yu Chongwen (2001): Science in China, Series D (Earth Sciences), 44(4), 289-297.
  • Shikoku Island
    • Kochi Prefecture
      • Kami City
Shima, M., Okada, A. & Yabuki, H. (1980) Mineralogical and petrographical study of the Zaisho meteorite, a pallasite from Japan: Zeitschrift für Naturforschung, Teil a, vol. 35a: 64-68. (Jan. 1980); Buseck, P. R. & Clark, J. (1982) The Zaisho Pallasite, a Bearer of Pyroxene and Phosphoran Olivine (abstract): Meteoritics 17 (4):189-190. (Dec 1982)
  • Eastern-Siberian Region
    • Krasnoyarsk Krai
Fuchs L H, Osen E, Gebert E (1973) New X-ray and compositional data for farringtonite, Mg3(PO4)2, American Mineralogist 58, 949-951
  • Missouri
    • Taney Co.
Floran, R.J. (1978) Silicate petrography, classification, and origin of the mesosiderites - Review and new observations. In: Lunar and Planetary Science Conference IX, Proceedings, Vol. 1: 1053-1081. New York: Pergamon Press.
The Moon
J. Frondel (2009), Lunar Mineralogy, Wiley Interscience
  • Descartes Highlands
Dowty, E., Keil, K., & Prinz, M. (1974) Igneous rocks from Apollo 16 rake samples. In: Lunar Science Conference, 5th, Houston, Tex., March 18-22, 1974, Proceedings. Volume 2. (A75-39540 19-91) New York, Pergamon Press, Inc., 1974, p. 431-445.
Mineral and/or Locality  
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