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Afmite

This page kindly sponsored by AF Microminéralogie
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Fumade, Castelnau-de-Brassac, Tarn, Midi-Pyrénées, France

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Formula:
Al
 
3
(OH)
 
4
(H2O)
 
3
(PO
 
4
)(PO
 
3
OH) · H2O
System:Triclinic
Name:
Named after the Association Française de Microminéralogie (AFM)


Related to Planerite and Kobokoboite.



Classification of Afmite

IMA status:Approved 2010
Nickel-Strunz 10th (pending) edition ID:8.DD.15

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
Dana 8th edition ID:42.9.3.6

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
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Type Occurrence of Afmite

Type Locality:Phosphate occurrence, Fumade, Castelnau-de-Brassac, Tarn, Midi-Pyrénées, France
Place of Conservation of Type Material:Natural History Museum of Los Angeles County, Los Angeles, catalogue number 55425

Crystallography of Afmite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Space Group Setting:P1
Cell Parameters:a = 7.386(3) Å, b = 7.716(3) Å, c = 11.345(4) Å
α = 99.773(5)°, β = 91.141(6)°, γ = 115.58(5)°
Ratio:a:b:c = 0.957 : 1 : 1.47
Unit Cell Volume:V 571.55 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
11.130(100)
6.813(30)
5.499(62)
4.029(24)
3.532(65)
3.087(41)
2.918(43)
2.466(21)

Chemical Properties of Afmite

Formula:
Al
 
3
(OH)
 
4
(H2O)
 
3
(PO
 
4
)(PO
 
3
OH) · H2O
Essential elements:Al, H, O, P
All elements listed in formula:Al, H, O, P

Relationship of Afmite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.DD.05Chenevixite
Cu
 
2
Fe
3+
2
(AsO
 
4
)
 
2
(OH)
 
4
8.DD.05Luetheite
Cu
 
2
Al
 
2
(AsO
 
4
)
 
2
(OH)
 
4
8.DD.10Akrochordite
(Mn
2+
 
,Mg)
 
5
(AsO
 
4
)
 
2
(OH)
 
4
 · 4H
 
2
O
8.DD.10Guanacoite
Cu
 
2
Mg
 
3
(AsO
 
4
)
 
2
(OH)
 
4
 · 4H
 
2
O
8.DD.15Aheylite
(Fe
2+
 
,Zn)Al
 
6
(PO
 
4
)
 
4
(OH)
 
8
 · 4H
 
2
O
8.DD.15Chalcosiderite
Cu(Fe
3+
 
,Al)
 
6
(PO
 
4
)
 
4
(OH)
 
8
 · 4H
 
2
O
8.DD.15Faustite
(Zn,Cu)Al
 
6
(PO
 
4
)
 
4
(OH)
 
8
 · 4H
 
2
O
8.DD.15Planerite
Al
 
6
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
(OH)
 
8
 · 4 H
 
2
O
8.DD.15Turquoise
Cu(Al,Fe
3+
 
)
 
6
(PO
 
4
)
 
4
(OH)
 
8
 · 4H
 
2
O
8.DD.20Childrenite
(Fe
2+
 
,Mn
2+
 
)Al(PO
 
4
)(OH)
 
2
 · H
 
2
O
8.DD.20Eosphorite
(Mn
2+
 
,Fe
2+
 
)Al(PO
 
4
)(OH)
 
2
 · H
 
2
O
8.DD.20Ernstite
(Mn
2+
 
,Fe
3+
 
)Al(PO
 
4
)(OH,O)
 
2
 · H
 
2
O

Other Names for Afmite

Synonyms:
IMA2005-025a
Other Languages:

Other Information

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 Afmite

Reference List:

- +
Mills, S. J., Birch, W. D., Kampf, A. R. & van Wambeke, L. (2010) Kobokoboite, Al6(PO4)4(OH)6•11H2O, a new mineral from the Kobokobo pegmatite, Democratic Republic of the Congo. European Journal of Mineralogy, 22(2), 305–308.

Kampf, A.R., Favreau, G., Steele, I.M., Mills, S.J., Rossman, G.R. and Pluth, J.J. (2010) Afmite, IMA 2005-025a. CNMNC Newsletter, August 2010, page 797; Mineralogical Magazine, 74, 797–800.

Anthony R. Kampf, Stuart J. Mills, George R. Rossman, Ian M. Steele, Joseph J. Pluth and Georges Favreau (2011) Afmite, Al3(OH)4(H2O)3(PO4)(PO3OH)•H2O, a new mineral from Fumade, Tarn, France: description and crystal structure. European Journal of Mineralogy 23, 269-277.

Internet Links for Afmite

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    • Localities for Afmite

    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.
    Hide Locality List
    (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.
    Democratic Republic of Congo (Zaïre)
     
    • Sud-Kivu
      • Lusungu River District
    		Mills et al (2010); Anthony R. Kampf, Stuart J. Mills, George R. Rossman, Ian M. Steele, Joseph J. Pluth and Georges Favreau (2011): Afmite, Al3(OH)4(H2O)3(PO4)(PO3OH)•H2O, a new mineral from Fumade, Tarn, France: description and crystal structure. European Journal of Mineralogy 23, 269-277.
    France
     
    • Midi-Pyrénées
      • Tarn
        • Castelnau-de-Brassac
          • Fumade
    		Anthony R. Kampf, Stuart J. Mills, George R. Rossman, Ian M. Steele, Joseph J. Pluth and Georges Favreau (2011): Afmite, Al3(OH)4(H2O)3(PO4)(PO3OH)•H2O, a new mineral from Fumade, Tarn, France: description and crystal structure. European Journal of Mineralogy 23, 269-277.
    USA
     
    • Pennsylvania
      • Northampton Co.
        • Lower Saucon Township
          • Hellertown
    		Anthony R. Kampf, Stuart J. Mills, George R. Rossman, Ian M. Steele, Joseph J. Pluth and Georges Favreau (2011): Afmite, Al3(OH)4(H2O)3(PO4)(PO3OH)•H2O, a new mineral from Fumade, Tarn, France: description and crystal structure. European Journal of Mineralogy 23, 269-277.; Kampf, A.R., Mills, S.J., Rumsey, M.S., Spratt, J. and Favreau, G. (2012) The crystal structure determination and redefinition of matulaite, Fe3+Al7(PO4)4(PO3OH)2(OH)8(H2O)8•8H2O. Mineralogical Magazine, 76(3), 517–534
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