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Farringtonite

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Springwater meteorite, Springwater, Saskatchewan, Canada
© 2008, JGW

Show Farringtonite Photos (2)



Formula:
Mg
 
3
(PO
 
4
)
 
2
System:MonoclinicColour:Colorless, white, pale ...
Name: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:Chopinite
This page provides mineralogical data about Farringtonite.

Classification of Farringtonite

IMA status:Approved
Strunz 8th edition ID:7/A.05-10
Nickel-Strunz 10th (pending) edition ID:8.AB.05

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
B : With medium-sized cations
Dana 7th edition ID:38.3.1.2
Dana 8th edition ID:38.3.1.2

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
3 : (AB)3(XO4)2
Hey's CIM Ref.:19.3.14

19 : Phosphates
3 : Phosphates of Be and Mg
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Type Occurrence of Farringtonite

Type Locality:Springwater meteorite, Springwater, Saskatchewan, Canada
Year of Discovery:1961
Associated Minerals at type locality:
KamaciteSchreibersiteTroiliteStanfielditeOlivine

Physical Properties of Farringtonite

Diaphaneity (Transparency):Transparent, Translucent
Colour:Colorless, white, pale yellow to amber yellow
Density (measured):2.74 g/cm3
Density (calculated):2.76 g/cm3

Crystallography of Farringtonite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 7.600Å, b = 8.236Å, c = 5.076Å
β = 94.06°
Ratio:a:b:c = 0.923 : 1 : 0.616
Unit Cell Volume:V 316.93 ų (Calculated from Unit Cell)
Z:2
Comment:P21/n; Acta Chemica Scandanivica 22:1466 (1968) structure
X-Ray Powder Diffraction:
d-spacingIntensity
4.36 (30)
4.31 (20)
4.12 (30)
4.08 (30)
3.85 (80)
3.66 (30)
3.44 (100)
2.41 (30)
Comments:ICDD 33-876 synthetic

Optical Data of Farringtonite

Type:Biaxial (+)
RI values: nα = 1.540 nβ = 1.544 nγ = 1.559
2V:Measured: 47° to 55°, Calculated: 56°
Birefringence:0.019
Maximum Birefringence:δ = 0.019

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:r < v
Optical Extinction:Z ^ c = 16°
Pleochroism:Non-pleochroic

Chemical Properties of Farringtonite

Formula:
Mg
 
3
(PO
 
4
)
 
2
Essential elements:Mg, O, P
All elements listed in formula:Mg, O, P

Relationship of Farringtonite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.AB.10Ferrisicklerite
(Fe
3+
 
,LiMn
2+
 
)PO
 
4
8.AB.10Heterosite
(Fe
3+
 
,Mn
3+
 
)PO
 
4
8.AB.10Lithiophilite
LiMn
2+
 
PO
 
4
8.AB.10Natrophilite
NaMn
2+
 
PO
 
4
8.AB.10Purpurite
(Mn
3+
 
,Fe
3+
 
)PO
 
4
8.AB.10Sicklerite
(LiMn
2+
 
,Fe
3+
 
)PO
 
4
8.AB.10Simferite
Li(Mg,Fe
3+
 
,Mn
3+
 
)
 
2
(PO
 
4
)
 
2
8.AB.10Triphylite
LiFe
2+
 
PO
 
4
8.AB.10Karenwebberite
Na(Fe
2+
 
,Mn
2+
 
)PO
 
4
8.AB.15Sarcopside
(Fe
2+
 
,Mn
2+
 
,Mg)
 
3
(PO
 
4
)
 
2
8.AB.15Chopinite
(Mg,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
8.AB.20Beusite
(Mn
2+
 
,Fe
2+
 
,Ca,Mg)
 
3
(PO
 
4
)
 
2
8.AB.20Graftonite
(Fe
2+
 
,Mn
2+
 
,Ca)
 
3
(PO
 
4
)
 
2
8.AB.25Xanthiosite
Ni
 
3
(AsO
 
4
)
 
2
8.AB.30Lammerite
Cu
 
3
(AsO
 
4
)
 
2
8.AB.30IMA2009-002
Cu
 
3
(AsO
 
4
)
 
2
8.AB.35Mcbirneyite
Cu
 
3
(VO
 
4
)
 
2
8.AB.35Stranskiite
Zn
 
2
Cu(AsO
 
4
)
 
2
8.AB.35Pseudolyonsite
Cu
 
3
(VO
 
4
)
 
2
8.AB.40Lyonsite
Cu
 
3
Fe
 
4
(VO
 
4
)
 
6
Related Minerals - Hey's Index Grouping:

- +
19.3.1Moraesite
Be
 
2
(PO
 
4
)(OH) · 4H
 
2
O
19.3.2Beryllonite
NaBePO
 
4
19.3.3Hurlbutite
CaBe
 
2
(PO
 
4
)
 
2
19.3.4Hydroxylherderite
CaBe(PO
 
4
)(OH,F)
19.3.5Glucine
CaBe
 
4
(PO
 
4
)
 
2
(OH)
 
4
 · 0.5H
 
2
O
19.3.6Fransoletite
Ca
 
3
Be
 
2
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
 · 4H
 
2
O
19.3.7Uralolite
Ca
 
2
Be
 
4
(PO
 
4
)
 
3
(OH)
 
3
 · 5H
 
2
O
19.3.9Pahasapaite
Li
 
8
(Ca,Li,K)
 
10.5
Be
 
24
(PO
 
4
)
 
24
 · 38H
 
2
O
19.3.10Tiptopite
K
 
2
(Na,Ca)
 
2
Li
 
3
Be
 
6
(PO
 
4
)
 
6
(OH)
 
2
 · H
 
2
O
19.3.11Gainesite
Na(Na,K)(Be,Li)Zr
 
2
(PO
 
4
)
 
4
 · 1.5-2H
 
2
O
19.3.12Roscherite
Ca
 
2
Mn
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
 · 6H
 
2
O
19.3.13Faheyite
(Mn,Mg,Na)Be
 
2
Fe
 
2
(PO
 
4
)
 
4
 · 6H
 
2
O
19.3.15Holtedahlite
Mg
 
2
(PO
 
4
)(OH)
19.3.16Althausite
Mg
 
2
(PO
 
4
)(OH,F)
19.3.17Newberyite
Mg(HPO
 
4
) · 3H
 
2
O
19.3.18Phosphorrösslerite
Mg(HPO
 
4
) · 7H
 
2
O
19.3.19Bobierrite
Mg
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
19.3.20Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
19.3.21Panethite
(Na,Ca)
 
2
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)
 
2
19.3.22Dittmarite
(NH
 
4
)Mg(PO
 
4
) · H
 
2
O
19.3.23Struvite
(NH
 
4
)Mg(PO
 
4
) · 6H
 
2
O
19.3.24Hannayite
(NH
 
4
)
 
2
Mg
 
3
H
 
4
(PO
 
4
)
 
4
 · 8H
 
2
O
Related Minerals - Dana Grouping):

- +
38.3.1.3Chopinite
(Mg,Fe
2+
 
)
 
3
(PO
 
4
)
 
2

Other Names for Farringtonite

Other Languages:
German:Farringtonit
Russian:Фаррингтонит
Spanish:Farringtonita

Other Information

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

References for Farringtonite

Reference List:

- +
Geochemica Cosmochemica Acta (1961): 24:198.

American Mineralogist (1961): 46: 1513.

American Mineralogist (1973): 58: 949

Acta Chemica Scandinavica (1968): 22: 1466-1474.

Internet Links for Farringtonite

Search Engines:
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    • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Farringtonite details from Handbook of Mineralogy (PDF)
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    • Localities for Farringtonite

    The 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.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Saskatchewan
      • Springwater
    		AM 58 (1973), 949, Geochim.Cosmochim. Acta (1961) 24, 198-205
    • Yukon Territory
      • Whitehorse Mining District
        • Carcross
          • Tagish Lake
    		Lunar and Planetary Science XXXII (2001)
    China
     
    • Anhui Province
      • Tongling Prefecture
        • Tongguanshan ore field
    		Cen Kuang and Yu Chongwen (2001): Science in China, Series D (Earth Sciences), 44(4), 289-297.
    The Moon
    J. Frondel (2009), Lunar Mineralogy, Wiley Interscience
    Mineral and/or Locality
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