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Durangite

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Formula:
NaAlAsO4F
System:
Monoclinic
Colour:
Light to dark ...
Lustre:
Vitreous
Hardness:
Member of:
Name:
After the locality in the state of Durango, Mexico.
Isostructural with:

Classification of Durangite

Approved, 'Grandfathered' (first described prior to 1959)
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
41.5.5.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
22.1.31

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

Physical Properties of Durangite

Vitreous
Diaphaneity (Transparency):
Translucent
Colour:
Light to dark orange-red, red; green; orange-yellow in artificial light.
Comment:
Green colour exhibited by artificial material.
Streak:
Cream-yellow
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {110}, distinct.
Fracture:
Irregular/Uneven
Density:
3.94 - 4.07 g/cm3 (Measured)    3.616 g/cm3 (Calculated)
Comment:
Highest in dark-coloured, ferrian material.

Optical Data of Durangite

Type:
Biaxial (-)
RI values:
nα = 1.634 nβ = 1.673 nγ = 1.685
2V:
Measured: 45° , Calculated: 56°
Max Birefringence:
δ = 0.051
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
strong
Pleochroism:
Visible
Comments:
X = ^c -25° = Orange-yellow
Y = Pale orange-yellow
Z = b = Nearly colourless

Chemical Properties of Durangite

IMA Formula:
NaAlAsO4F
Elements listed in formula:

Crystallography of Durangite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Space Group Setting:
C2/c
Cell Parameters:
a = 6.5789(5) Å, b = 8.5071(6) Å, c = 7.0212(5) Å
β = 115.447(4)°
Ratio:
a:b:c = 0.773 : 1 : 0.825
Unit Cell Volume:
V 354.83 ų
Z:
4
Morphology:
Crystal habit is oblique pyramidal with {111} and {110} dominant. Faces commonly dull and rough. Artificial crystals are prismatic [101], and rarely tabular.
Twinning:
On {001} common as interopenetration twins (artificial crystals).

Type Occurrence of Durangite

Associated Minerals at Type Locality:

Relationship of Durangite to other Species

Series:
Forms a series with Maxwellite (see here)
Forms a series with Tilasite (see here)
Member of:
Other Members of Group:
IsokiteCaMg(PO4)F
KononoviteNaMg(SO4)F
LacroixiteNaAl(PO4)F
MaxwelliteNaFe3+(AsO4)F
PanasqueiraiteCaMg(PO4)(OH,F)
TilasiteCaMg(AsO4)F
Common Associates:
8.BH.05ThadeuiteCaMg3(PO4)2(OH,F)2
8.BH.10IsokiteCaMgPO4F
8.BH.10LacroixiteNaAl(PO4)F
8.BH.10MaxwelliteNaFe3+AsO4F
8.BH.10PanasqueiraiteCaMgPO4(OH)
8.BH.10TilasiteCaMgAsO4F
8.BH.15DrugmanitePb2Fe3+(PO4)(PO3OH)(OH)2
8.BH.20BjarebyiteBaMn22+Al2(PO4)3(OH)3
8.BH.20CirroliteCa3Al2(PO4)3(OH)3
8.BH.20KulaniteBaFe22+Al2(PO4)3(OH)3
8.BH.20PenikisiteBaMg2Al2(PO4)3(OH)3
8.BH.20PerloffiteBaMn22+Fe23+(PO4)3(OH)3
8.BH.20JohntomaiteBaFe22+Fe23+(PO4)3(OH)3
8.BH.25BertossaiteLi2CaAl4(PO4)4(OH)4
8.BH.25PalermoiteLi2SrAl4(PO4)4(OH)4
8.BH.30CarminitePbFe23+(AsO4)2(OH)2
8.BH.30SewarditeCaFe23+(AsO4)2(OH)2
8.BH.35AdeliteCaMgAsO4(OH)
8.BH.35ArsendescloizitePbZnAsO4(OH)
8.BH.35AustiniteCaZnAsO4(OH)
8.BH.35CobaltaustiniteCaCoAsO4(OH)
8.BH.35ConichalciteCaCuAsO4(OH)
8.BH.35DuftitePbCuAsO4(OH)
8.BH.35GabrielsonitePbFeAsO4(OH)
8.BH.35NickelaustiniteCaNiAsO4(OH)
8.BH.35TangeiteCaCuVO4(OH)
8.BH.35GottlobiteCaMg(VO4)(OH)
8.BH.35HermannroseiteCaCu(PO4)(OH)
8.BH.40ČechitePbFe2+VO4(OH)
8.BH.40DescloizitePbZnVO4(OH)
8.BH.40MottramitePbCuVO4(OH)
8.BH.40PyrobelonitePbMn2+VO4(OH)
8.BH.45BayldoniteCu3PbO(AsO3OH)2(OH)2
8.BH.45VésigniéiteCu3Ba(VO4)2(OH)2
8.BH.50PaganoiteNiBi3+OAsO4
8.BH.55JagoweriteBaAl2(PO4)2(OH)2
8.BH.60AttakoliteCaMn2+Al4(HSiO4)(PO4)3(OH)4
8.BH.65LeningraditePbCu3(VO4)2Cl2
22.1.1AmblygoniteLiAlPO4F
22.1.2LacroixiteNaAl(PO4)F
22.1.3NatrophosphateNa7(PO4)2F · 19H2O
22.1.5NacaphiteNa2Ca(PO4)F
22.1.6ArctiteNa5Ca7Ba(PO4)6F3
22.1.7NefedoviteNa5Ca4(PO4)4F
22.1.9FluorapatiteCa5(PO4)3F
22.1.10HerderiteCaBePO4F
22.1.11IsokiteCaMgPO4F
22.1.12PanasqueiraiteCaMgPO4(OH)
22.1.13BabefphiteBaBePO4F
22.1.14FluelliteAl2(PO4)F2(OH) · 7H2O
22.1.15MinyuliteKAl2(PO4)2F · 4H2O
22.1.16MoriniteNaCa2Al2(PO4)2(OH)F4 · 2H2O
22.1.17BøggilditeNa2Sr2Al2(PO4)F9
22.1.18FluorstrophiteSrCaSr3(PO4)3F
22.1.19ViitaniemiiteNaCaAlPO4F3
22.1.20VäyryneniteMn2+Be(PO4)OH
22.1.21MaxwelliteNaFe3+AsO4F
22.1.22WagneriteMg2PO4F
22.1.23Triplite(Mn2+,Fe2+)2PO4(F,OH)
22.1.24Magniotriplite(Mg,Fe2+,Mn2+)2PO4F
22.1.25ZwieseliteFe2+Mn2+PO4F
22.1.26McauslaniteFe32+Al2(PO4)3(PO3OH)F · 18H2O
22.1.27RichelliteCaFe23+(PO4)2(OH,F)2
22.1.28SvabiteCa5(AsO4)3F
22.1.29TilasiteCaMgAsO4F
22.1.30Johnbaumite-MCa5(AsO4)3OH

Other Names for Durangite

Name in Other Languages:
German:Durangit
Spanish:Durangita

Other Information

Other Information:
Soluble in H2SO4.
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 Durangite

Reference List:
Brush (1869) American Journal of Science: 48: 179.

Des Cloizeaux (1875) Annales de chimie et de physique, Paris: 4: 401.

Hawes analysis in: Brush (1876) American Journal of Science: 11: 464.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 780.

Goldschmidt, V. (1916) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 3: 77.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 70.

Strunz (1937) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 96: 7.

Kokkoros (1938) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 99: 38.

Strunz (1938) Zentralblatt Mineralien: 59.

Machatschki (1941) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 103: 221.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 829-831.

Canadian Mineralogist (1985): 23: 241.

G. W. Downs, B. N. Yang, R. M. Thompson, M. D. Wenz and M. B. Andrade (2012): Redetermination of durangite, NaAl(AsO4)F. Acta Crystallographica E68, i86-i87.

Internet Links for Durangite

mindat.org URL:
https://www.mindat.org/min-1332.html
Please feel free to link to this page.

Localities for Durangite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
 
  • Nova Scotia
    • Lunenburg Co.
      • New Ross
E.F. Foord, M.R. Oakman, and C.H. Maxwell, "Durangite from the Black Range, New Mexico, and New Data on Durangite from Durango and Cornwall", Canadian Mineralogist, 1985.
E.R. Faribault, "Lunenberg County, Nova Scotia", Summ. Rep. Geol. Surv. Dep. Canada for 1907, pp. 80-82, 1908.
Mexico (TL)
 
  • Durango
    • Mun. de Coneto de Comonfort
      • Coneto de Comonfort
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 830; Canadian Mineralogist (1985): 23: 241.; Brush G J (1869) On durangite, a fluo-arsenate from Durango in Mexico. American Journal of Science and Arts 98, 179-182
UK
 
  • England
    • Cornwall
      • Liskeard District
        • Linkinhorne
          • Minions
Embrey, P. (1978): Fourth supplementary list of British minerals, Mineralogical Magazine 42,172 (1978); Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
USA
 
  • New Mexico
    • Catron Co.
      • Taylor Creek District
        • Sawmill Creek
NMGS 37th Field Conference
    • Sierra Co.
Northrop, Minerals of New Mexico, 3rd rev. ed., 1996
NMGS 37th Field Conference
http://geoinfo.nmt.edu/museum/minsymp/abstracts/view.cfml?aid=90
Minerals of New Mexico 3rd ed.
  • Utah
    • Juab Co.
Mineralogical Record: 17(5): 342.
In the collection of Alex Earl
Mineral and/or Locality  
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