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Haigerachite

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Formula:
KFe3+3(HPO4)2(H2PO4)6 · 4H2O
Lustre:
Vitreous
Hardness:
2
Crystal System:
Monoclinic
Name:
Named for the village and valley near the locality.
Associated with Gengenbachite.


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Classification of HaigerachiteHide

Approved
8.CF.10

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
F : With large and medium-sized cations, RO4:H2O > 1:1

Physical Properties of HaigerachiteHide

Vitreous
Hardness:

Optical Data of HaigerachiteHide

Type:
Biaxial (-)
RI values:
nα = 1.557 nβ = 1.598 nγ = 1.602
Max Birefringence:
δ = 0.045
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak

Chemical Properties of HaigerachiteHide

Formula:
KFe3+3(HPO4)2(H2PO4)6 · 4H2O
IMA Formula:
KFe3+3(H2PO4)6(HPO4)2 · 4H2O

Crystallography of HaigerachiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 16.95 Å, b = 9.59 Å, c = 17.57 Å
β = 90.85°
Ratio:
a:b:c = 1.767 : 1 : 1.832
Unit Cell V:
2,855.70 ų (Calculated from Unit Cell)
Z:
4

Type Occurrence of HaigerachiteHide

Synonyms of HaigerachiteHide

Other Language Names for HaigerachiteHide

Related Minerals - Nickel-Strunz GroupingHide

8.CF.05GrischuniteNaCa2Mn2+5Fe3+(AsO4)6 · 2H2OOrth.
8.CF.05WicksiteNaCa2(Fe2+,Mn2+)4MgFe3+(PO4)6 · 2H2OOrth. mmm (2/m 2/m 2/m)
8.CF.05BederiteCa2(Mn2+)4(Fe3+)2(PO4)6 · 2H2OOrth.
8.CF.05Tassieite(Na,◻)Ca2(Mg,Fe2+,Fe3+)2(Fe2+,Mg)2(Fe3+,Mg)2(PO4)6 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca

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 HaigerachiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Walenta, K. and Theye, Th. (1999): Haigerachit, ein neues Phosphatmineral von der Grube Silberbrünnle bei Gengenbach im mittleren Schwarzwald. Aufschluss, 50, 1-7. (in German).
Waerstad, K. R. & Frazier, A. W. (1987): X-ray powder diffraction and single-crystal data for the isomorphous series (Fe,Al)3(K,NH4,H3O)H14(PO4)8.4H2O. Powder Diffraction 2, 187-190.
Anisimova, N., Chudinova, N. & Serafin, M. (1997): Preparation and crystal structure of potassium iron hydrogen phosphate KFe3(HPO4)2(H2PO4)6.4(H2O). Zeitschrift für Anorganische und Allgemeine Chemie 623, 1708-1714.

Internet Links for HaigerachiteHide

Localities for HaigerachiteHide

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)
 
  • Baden-Württemberg
    • Black Forest
      • Gengenbach
        • Haigerach valley
Walenta, K. and Theye, Th. (1999): Haigerachit, ein neues Phosphatmineral von der Grube Silberbrünnle bei Gengenbach im mittleren Schwarzwald. Aufschluss, 50, 1-7. (in German); Wittern,A. (1995) Mineralien finden im Schwarzwald
Mineral and/or Locality  
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