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Nordgauite

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About NordgauiteHide

Formula:
MnAl2(PO4)2(F,OH)2 · 5H2O
Colour:
White to off-white
Lustre:
Waxy, Earthy
Specific Gravity:
2.35
Crystal System:
Triclinic
Name:
The mineral is named for Nordgau, the oldest name for that part of northeastern Bavaria in which Hagendorf is situated, and where mining has taken place since the 13th century.
This page provides mineralogical data about Nordgauite.


Classification of NordgauiteHide

Approved
Approval Year:
2010
8.DC.30

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
42.11.11.3

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O

Physical Properties of NordgauiteHide

Waxy, Earthy
Comment:
Silky in fibrous aggregates
Colour:
White to off-white
Streak:
White
Density:
2.35 g/cm3 (Measured)    2.46 g/cm3 (Calculated)
Comment:
The measured density is slightly lower than the calculated density probably due to a small degree of porosity in the measured fragments.

Optical Data of NordgauiteHide

Type:
Biaxial
RI values:
n = 1.57
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of NordgauiteHide

Formula:
MnAl2(PO4)2(F,OH)2 · 5H2O
IMA Formula:
MnAl2(PO4)2(F,OH)2 · 5.5H2O

Crystallography of NordgauiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 9.920(4) Å, b = 9.933(3) Å, c = 6.087(2) Å
α = 92.19(3)°, β = 100.04(3)°, γ = 97.61(3)°
Ratio:
a:b:c = 0.999 : 1 : 0.613
Unit Cell V:
584.2 ų
Z:
2
Morphology:
The dominant form (ribbon face) is {100}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.806 Å(100)
7.432 Å(40)
4.596 Å(12)
4.119 Å(20)
3.225 Å(12)
3.215 Å(12)
2.976 Å(12)
2.951 Å(16)

Type Occurrence of NordgauiteHide

General Appearance of Type Material:
Compact nodules, which are very fine-grained, but in places show a thin fibrous outer crust.
Place of Conservation of Type Material:
Museum Victoria, Melbourne, Australia: registered number M48795 and M51231.
Geological Setting of Type Material:
Nordgauite has formed as a late-stage hydrothermal phase in the secondary phosphate suite, the end-product of the decomposition of zwieselite-triplite.
Associated Minerals at Type Locality:

Synonyms of NordgauiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Nordgauite associated with Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2O
1 photo of Nordgauite associated with ZwieseliteFe2+2(PO4)F
1 photo of Nordgauite associated with Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
1 photo of Nordgauite associated with Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2O

Related Minerals - Nickel-Strunz GroupingHide

8.DC.05NissoniteCu2Mg2(PO4)2(OH)2 · 5H2OMon.
8.DC.07EuchroiteCu2(AsO4)(OH) · 3H2OOrth. 2 2 2 : P21 21 21
8.DC.10LegranditeZn2(AsO4)(OH) · H2OMon. 2/m : P21/b
8.DC.12StrashimiriteCu8(AsO4)4(OH)4 · 5H2OMon.
8.DC.15ArthuriteCuFe3+2(AsO4)2(OH)2 · 4H2OMon.
8.DC.15EarlshannoniteMn2+Fe3+2(PO4)2(OH)2 · 4H2OMon.
8.DC.15OjuelaiteZnFe3+2(AsO4)2(OH)2 · 4H2OMon.
8.DC.15WhitmoreiteFe2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15Cobaltarthurite(Co,Mg)Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15BendadaiteFe2+Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15KunatiteCuFe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15UKI-2006-(PO:FeHZn)ZnFe3+2(PO4)2(OH)2 · 4H2OMon.
8.DC.15UKI-2006-(PO:AlCuFeH)Fe2+Al3+2(PO4)2(OH)2 · 4H2O
8.DC.17KleemaniteZnAl2(PO4)2(OH)2 · 3H2OMon.
8.DC.20BermaniteMn2+Mn3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P2/b
8.DC.20CoralloiteMn2+Mn3+2(AsO4)2(OH)2 · 4H2OTric. 1 : P1
8.DC.22KovdorskiteMg2(PO4)(OH) · 3H2OMon.
8.DC.25FerristrunziteFe3+Fe3+2(PO4)2(OH)3 · 5H2OTric.
8.DC.25FerrostrunziteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric.
8.DC.25MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
8.DC.25MetavivianiteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.25StrunziteMn2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.27BerauniteFe2+Fe3+5(PO4)4(OH)5 · 6H2OMon. 2/m : B2/b
8.DC.30GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric.
8.DC.30ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30PseudolaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
8.DC.30SigloiteFe3+Al2(PO4)2(OH)3 · 7H2OTric.
8.DC.30StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric.
8.DC.30FerrolaueiteFe2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.32TinticiteFe3+5.34(PO4)3.62(VO4)0.38(OH)4 · 6.7H2OTric. 1 : P1
8.DC.35VauxiteFe2+Al2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.37VantasseliteAl4(PO4)3(OH)3 · 9H2OOrth.
8.DC.40CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2OHex. 6/m : P63/m
8.DC.45Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
8.DC.45Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
8.DC.47KingiteAl3(PO4)2F2(OH) · 7H2OTric.
8.DC.50WavelliteAl3(PO4)2(OH,F)3 · 5H2OOrth. mmm (2/m 2/m 2/m)
8.DC.50AllanpringiteFe3+3(PO4)2(OH)3 · 5H2OMon. 2/m : P21/m
8.DC.52KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2OTric. 1 : P1
8.DC.55MapimiteZn2Fe3+3(AsO4)3(OH)4 · 10H2OMon.
8.DC.57OgdensburgiteCa2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
8.DC.60Nevadaite(Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2OOrth. mmm (2/m 2/m 2/m)
8.DC.60CloncurryiteCu0.5(VO)0.5Al2(PO4)2F2 · 5H2OMon. 2/m : P21/b

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

42.11.11.1MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b

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 NordgauiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Birch, W.D. et al (2010); Nordgauite, IMA 2010-040, CNMNC Newsletter, October 2010, p.902; Mineralogical Magazine 74, 899-902.
Birch, W.D., Grey, I.E., Mills, S.J., Pring, A., Bougerol, C., Ribaldi-Tunnicliffe, A., Wilson, N.C. & Keck, E. (2011): Nordgauite, MnAl2(PO4)2(F,OH)2 . 5H2O, a new mineral from the Hagendorf-Süd pegmatite, Bavaria, Germany: description and crystal structure. Mineralogical Magazine, 75, 269-278.

Internet Links for NordgauiteHide

Localities for NordgauiteHide

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.
Germany (TL)
 
  • Bavaria
    • Upper Palatinate
      • Neustadt an der Waldnaab
        • Waidhaus
          • Hagendorf
Birch, W.D., et al. Mineralogical Magazine75, 269-278(2011); Grey, I. E., Macrae, C. M., Keck, E., & Birch, W. D. (2012). Aluminium-bearing strunzite derived from jahnsite at the Hagendorf-Süd pegmatite, Germany. Mineralogical Magazine, 76(5), 1165-1174.
http://www.mineralienatlas.de/lexikon/index.php/Deutschland/Bayern/Oberpfalz%2C%20Bezirk/Neustadt%20an%20der%20Waldnaab%2C%20Landkreis/Waidhaus/Silbergrube
Portugal
 
  • Guarda
    • Sabugal
      • Bendada
        • Bendada Mines
ALVES, P., MILLS, S. (2013) Nuevos datos sobre los fosfatos de Bendada, Sabugal (Portugal). ACOPIOS-Revista Ibérica de Mineralogía, Vol 4 (2013): 349-377.
USA
 
  • North Carolina
    • Cleveland Co.
      • Kings Mountain Mining District
Collections and photos of Jason Smith and Luigi Chiappino
 
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