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Maxwellite

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About MaxwelliteHide

Formula:
NaFe3+(AsO4)F
Colour:
Red
Lustre:
Vitreous, Sub-Vitreous
Hardness:
5 - 5½
Specific Gravity:
3.90
Crystal System:
Monoclinic
Member of:
Name:
Named by Eugene E. Foord, Paul F. Hlava, Joan J. Fitzpatrick, Richard C. Erd, and R. W. Hinton in honor of Charles Henry Maxwell (9 July 1923 – 29 May 2000 Denver, Colorado), geologist and mineralogist with the U.S. Geological Survey, who studied the Taylor Creek district.
Isostructural with:

Classification of MaxwelliteHide

Approved
Approval Year:
1987
8.BH.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
41.5.5.3

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
22.1.21

22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride

Physical Properties of MaxwelliteHide

Vitreous, Sub-Vitreous
Transparency:
Translucent
Colour:
Red
Streak:
Pale red-orange to red-orange
Hardness:
5 - 5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
{110}
Fracture:
Irregular/Uneven
Density:
3.90 g/cm3 (Measured)    3.95 g/cm3 (Calculated)

Optical Data of MaxwelliteHide

Type:
Biaxial (+)
RI values:
nα = 1.748 nβ = 1.772 nγ = 1.798
2V:
Measured: 86° to 89°, Calculated: 90°
Birefringence:
0.050
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v strong
Comments:
X=Y= medium yellow-orange; Z= dark orange-red.

Chemical Properties of MaxwelliteHide

Formula:
NaFe3+(AsO4)F

Crystallography of MaxwelliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/m
Cell Parameters:
a = 7.16 Å, b = 8.78 Å, c = 6.68 Å
β = 114.58°
Ratio:
a:b:c = 0.815 : 1 : 0.761
Unit Cell V:
381.88 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Slightly elongated to blocky crystals

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014873MaxwelliteCooper M A, Hawthorne F C (1995) The crystal structure of maxwellite Neues Jahrbuch fur Mineralogie, Monatshefte 1995 97-1041995Squaw Creek, Catron County, New Mexico, USA0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.290 Å(100)
2.614 Å(80)
3.039 Å(75)
4.844 Å(70)
2.637 Å(50)
3.642 Å(35)
3.437 Å(35)
Comments:
Original description

Type Occurrence of MaxwelliteHide

Geological Setting of Type Material:
Formed as a rarity in miarolitic cavities in rhyolite adjacent to high-temperature veins in a hydrothermal tin deposit.
Associated Minerals at Type Locality:

Synonyms of MaxwelliteHide

Other Language Names for MaxwelliteHide

Relationship of Maxwellite to other SpeciesHide

Member of:
Other Members of this group:
DurangiteNaAl(AsO4)FMon. 2/m : B2/b
IsokiteCaMg(PO4)FMon. 2/m : B2/b
KononoviteNaMg(SO4)FMon. 2/m : B2/b
LacroixiteNaAl(PO4)FMon. 2/m : B2/b
PanasqueiraiteCaMg(PO4)(OH,F)Mon.
TilasiteCaMg(AsO4)FMon. m : Bb
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Maxwellite associated with TripuhyiteFe3+Sb5+O4
1 photo of Maxwellite associated with AdeliteCaMg(AsO4)(OH)
1 photo of Maxwellite associated with Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O

Related Minerals - Nickel-Strunz GroupingHide

8.BH.CrimsonitePbFe3+2(PO4)2(OH)2Orth. mmm (2/m 2/m 2/m) : Cccm
8.BH.05ThadeuiteCa(Mg,Fe2+)3(PO4)2(OH,F)2Orth. 2 2 2 : C2 2 21
8.BH.10DurangiteNaAl(AsO4)FMon. 2/m : B2/b
8.BH.10IsokiteCaMg(PO4)FMon. 2/m : B2/b
8.BH.10LacroixiteNaAl(PO4)FMon. 2/m : B2/b
8.BH.10PanasqueiraiteCaMg(PO4)(OH,F)Mon.
8.BH.10TilasiteCaMg(AsO4)FMon. m : Bb
8.BH.15DrugmanitePb2(Fe3+,Al)(PO4)(PO3OH)(OH)2Mon. 2/m : P21/b
8.BH.20Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3Mon.
8.BH.20CirroliteCa3Al2(PO4)3(OH)3 (?)
8.BH.20KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3Mon.
8.BH.20PenikisiteBa(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20PerloffiteBa(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20JohntomaiteBaFe2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.25Bertossaite(Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4Orth.
8.BH.25Palermoite(Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4Orth.
8.BH.30CarminitePbFe3+2(AsO4)2(OH)2Orth. mmm (2/m 2/m 2/m) : Cccm
8.BH.30SewarditeCaFe3+2(AsO4)2(OH)2Orth. mmm (2/m 2/m 2/m) : Cccm
8.BH.35AdeliteCaMg(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35ArsendescloizitePbZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35AustiniteCaZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35CobaltaustiniteCaCo(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35ConichalciteCaCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35DuftitePbCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35GabrielsonitePbFe3+(As3+O3)OOrth. mm2 : Pmc21
8.BH.35NickelaustiniteCaNi(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35TangeiteCaCu(VO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35GottlobiteCaMg(VO4,AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35HermannroseiteCaCu(PO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.40ČechitePbFe2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m)
8.BH.40DescloizitePbZn(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
8.BH.40MottramitePbCu(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
8.BH.40PyrobelonitePbMn2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
8.BH.45BayldonitePbCu3(AsO4)2(OH)2Mon. 2/m : B2/b
8.BH.45VésigniéiteBaCu3(VO4)2(OH)2Mon. 2/m : B2/m
8.BH.50PaganoiteNiBi(AsO4)OTric. 1 : P1
8.BH.55JagoweriteBaAl2(PO4)2(OH)2Tric.
8.BH.60AttakoliteCaMn2+Al4(SiO3OH)(PO4)3(OH)4Mon. 2/m : B2/m
8.BH.65LeningraditePbCu3(VO4)2ClOrth. mmm (2/m 2/m 2/m) : Ibam

Related Minerals - Dana Grouping (8th Ed.)Hide

41.5.5.1LacroixiteNaAl(PO4)FMon. 2/m : B2/b
41.5.5.2DurangiteNaAl(AsO4)FMon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

22.1.1AmblygoniteLiAl(PO4)FTric. 1 : P1
22.1.2LacroixiteNaAl(PO4)FMon. 2/m : B2/b
22.1.3NatrophosphateNa7(PO4)2F · 19H2OIso. m3m (4/m 3 2/m) : Fd3c
22.1.5NacaphiteNa2Ca(PO4)FMon. 2/m : P21/b
22.1.6ArctiteNa2Ca4(PO4)3FTrig. 3m (3 2/m) : R3m
22.1.7NefedoviteNa5Ca4(PO4)4FTric.
22.1.9FluorapatiteCa5(PO4)3FHex. 6/m : P63/m
22.1.10HerderiteCaBe(PO4)FMon. 2/m
22.1.11IsokiteCaMg(PO4)FMon. 2/m : B2/b
22.1.12PanasqueiraiteCaMg(PO4)(OH,F)Mon.
22.1.13BabefphiteBaBePO4(F,OH)Tet.
22.1.14FluelliteAl2(PO4)F2(OH) · 7H2OOrth. mmm (2/m 2/m 2/m) : Fddd
22.1.15MinyuliteKAl2(PO4)2(OH,F) · 4H2OOrth. mm2 : Pba2
22.1.16MoriniteNaCa2Al2(PO4)2(OH)F4 · 2H2OMon. 2/m
22.1.17BøggilditeNa2Sr2Al2PO4F9Mon.
22.1.18FluorstrophiteSrCaSr3(PO4)3FHex. 6/m : P63/m
22.1.19ViitaniemiiteNa(Ca,Mn2+)Al(PO4)(F,OH)3Mon.
22.1.20VäyryneniteMn2+Be(PO4)(OH,F)Mon. 2/m : P21/b
22.1.22Wagnerite(Mg,Fe2+)2(PO4)FMon. 2/m : P21/b
22.1.23TripliteMn2+2(PO4)FMon. 2/m
22.1.24Magniotriplite(Mg,Fe2+,Mn2+)2PO4FMon.
22.1.25ZwieseliteFe2+2(PO4)FMon. 2/m : P21/b
22.1.26McauslaniteFe3Al2(PO4)3(PO3OH)F · 18H2OTric.
22.1.27RichelliteCaFe3+2(PO4)2(OH,F)2Amor.
22.1.28SvabiteCa5(AsO4)3FHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
22.1.29TilasiteCaMg(AsO4)FMon. m : Bb
22.1.30Johnbaumite-MCa5(AsO4)3OHMon. 2/m : P21/m
22.1.31DurangiteNaAl(AsO4)FMon. 2/m : B2/b

Fluorescence of MaxwelliteHide

Not fluorescent in UV

Other InformationHide

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 MaxwelliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Foord, E.E., P.F. Hlava, J.J. Fitzpatrick, R.C. Erd, and R.W. Hinton (1991) Maxwellite and squawcreekite, two new minerals from the Black Range tin district, Catron County, New Mexico, U.S.A. Neues Jahrbuch für Mineralogie, Monatshefte, 363–384. (2) (1992).
American Mineralogist: 77: 449 (abstract).
Cooper, M.A. and F.C. Hawthorne (1995) The crystal structure of maxwellite. Neues Jahrbuch für Mineralogie, Monatshefte, 97–104.
New Minerals (1997), New Minerals 1990-1994.

Internet Links for MaxwelliteHide

Localities for MaxwelliteHide

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.
USA (TL)
 
  • New Mexico
    • Catron Co.
      • Taylor Creek Mining District
Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996; Mineralogical Record: 20(5): 404.
    • Sierra Co.
Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
Minerals of New Mexico 3rd ed.
Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
 
Mineral and/or Locality  
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