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Struvite-(K)

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Formula:
KMgPO4 · 6H2O
System:
Orthorhombic
Colour:
Colourless
Lustre:
Vitreous
Member of:
Name:
Relation to Struvite
Isostructural with:
Struvite Group.
The potassium analogue of Struvite.


Classification of Struvite-(K)

Approved
Approval Year:
2003
8.CH.40

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
H : With large and medium-sized cations, RO4:H2O < 1:1
40.1.1.2

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
1 : AB(XO4)·xH2O

Physical Properties of Struvite-(K)

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless

Optical Data of Struvite-(K)

Type:
Biaxial (+)
RI values:
nα = 1.490 nβ = 1.493
Max Birefringence:
δ = 1.490
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Struvite-(K)

IMA Formula:
KMgPO4 · 6H2O
Elements listed in formula:

Crystallography of Struvite-(K)

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pmn21
Cell Parameters:
a = 6.903 Å, b = 6.174 Å, c = 11.146 Å
Ratio:
a:b:c = 1.118 : 1 : 1.805
Unit Cell Volume:
V 475.03 ų (Calculated from Unit Cell)
Morphology:
Needles, elongated parallel to [100]
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.26(100)
4.14(80)
3.27(90)
2.905(50)
2.699(50)
2.650(70)
1.954(50)
Comments:
From type description.

Type Occurrence of Struvite-(K)

Relationship of Struvite-(K) to other Species

Member of:
Other Members of Group:
HazeniteKNaMg2(PO4)2 · 14H2O
Struvite(NH4)Mg(PO4) · 6H2O
8.CH.05WalentaiteH2Ca2Fe63+(AsO4)5(PO4)3 · 14H2O
8.CH.10AnapaiteCa2Fe2+(PO4)2 · 4H2O
8.CH.15PicropharmacoliteCa4Mg(AsO3OH)2(AsO4)2 · 11H2O
8.CH.20Dittmarite(NH4)MgPO4 · H2O
8.CH.20Niahite(NH4)Mn2+PO4 · H2O
8.CH.25FrancoanelliteK3Al5(PO3OH)6(PO4)2 · 12H2O
8.CH.25TaranakiteK3Al5(PO3OH)6(PO4)2 · 18H2O
8.CH.30Schertelite(NH4)2Mg(PO3OH)2 · 4H2O
8.CH.35Hannayite(NH4)2Mg3(PO3OH)4 · 8H2O
8.CH.40Struvite(NH4)MgPO4 · 6H2O
8.CH.40HazeniteKNaMg2(PO4)2 · 14H2O
8.CH.45RimkorolgiteBaMg5(PO4)4 · 8H2O
8.CH.50BakhchisaraitseviteNa2Mg5(PO4)4 · 7H2O
8.CH.55FahleiteCaZn5Fe23+(AsO4)6 · 14H2O
8.CH.55SmolyaninoviteCo3Fe23+(AsO4)4 · 11H2O
8.CH.60Barahonaite-(Al)(Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x · nH2O
8.CH.60Barahonaite-(Fe)(Ca,Cu,Na,Fe3+,Al)12Fe23+(AsO4)8(OH,Cl)x · nH2O

Other Names for Struvite-(K)

Name in Other Languages:
German:Struvit-K
Simplified Chinese:钾鸟粪石

Other Information

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 Struvite-(K)

Reference List:
Postl, W., Walter, F., Ettinger K.. &. Bojar, H.-P. (2000): Erster Nachweis des Kalium-Analogons MgK(PO4) . 6H2O von Struvit, und der kristallinen Phase Mg2KH(PO4)2 . 15H2O aus dem ehemaligen Bleibergbau Rossblei, Eschachalm, Schladminger Tauern, Steiermark, Österreich. Joannea Mineralogie, 1, 45-52.

S. Graeser, W. Postl, H. Bojar, P. Berlepsch, T. Armbruster, T. Raber, K. Ettinger & F. Walter (2008): Struvite-(K), KMgPO4.6H2O, the potassium equivalent of struvite - a new mineral. European Journal of Mineralogy 20, 629-633.

Internet Links for Struvite-(K)

mindat.org URL:
https://www.mindat.org/min-27534.html
Please feel free to link to this page.

Localities for Struvite-(K)

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.
(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.
Austria (TL)
 
  • Styria
    • Schladming
      • Schladminger Tauern
        • Obertalbach valley
          • Eschach Alp (Eschachboden; Martinlager)
Postl, W., Walter, F., Ettinger K.. &. Bojar, H.-P. (2000): Erster Nachweis des Kalium-Analogons MgK(PO4).6H2O von Struvit, und der kristallinen Phase Mg2KH(PO4)2.15H2O aus dem ehemaligen Bleibergbau Rossblei, Eschachalm, Schladminger Tauern, Steiermark, Österreich. Joannea Min., 1, 45-52; Roth, Ph. (2007): Minerals first discovered in Switzerland and minerals named after Swiss individuals. Philippe Roth, Ed., Zurich, 239 pp.; S. Graeser, W. Postl, H. Bojar, P. Berlepsch, T. Armbruster, T. Raber, K. Ettinger & F. Walter (2008): Struvite-(K), KMgPO4.6H2O, the potassium equivalent of struvite - a new mineral. European Journal of Mineralogy 20, 629-633.
Switzerland (TL)
 
  • Wallis (Valais)
    • Binn Valley
      • Fäld (Imfeld; Im Feld; Feld)
Roth, Ph. (2007): Minerals first discovered in Switzerland and minerals named after Swiss individuals. Philippe Roth, Ed., Zurich, 239 pp; S. Graeser, W. Postl, H. Bojar, P. Berlepsch, T. Armbruster, T. Raber, K. Ettinger & F. Walter (2008): Struvite-(K), KMgPO4.6H2O, the potassium equivalent of struvite - a new mineral. European Journal of Mineralogy 20, 629-633.
Mineral and/or Locality  
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