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Struvite-(K)

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Struvite Group.
The potassium analogue of Struvite.


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Classification of Struvite-(K)Hide

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)Hide

Vitreous
Transparency:
Transparent
Colour:
Colourless

Optical Data of Struvite-(K)Hide

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)Hide

Formula:
KMg(PO4)·6H2O
IMA Formula:
KMgPO4 · 6H2O

Crystallography of Struvite-(K)Hide

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 V:
475.03 ų (Calculated from Unit Cell)
Morphology:
Needles, elongated parallel to [100]

X-Ray Powder DiffractionHide

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)Hide

Synonyms of Struvite-(K)Hide

Other Language Names for Struvite-(K)Hide

German:Struvit-K
Simplified Chinese:钾鸟粪石

Relationship of Struvite-(K) to other SpeciesHide

Member of:
Other Members of this group:
HazeniteKNaMg2(PO4)2 · 14H2OOrth. mm2
Struvite(NH4)Mg(PO4) · 6H2OOrth. mm2

Related Minerals - Nickel-Strunz GroupingHide

8.CH.05WalentaiteH(Ca,Mn2+,Fe2+)Fe3+3(AsO4,PO4)4 · 7H2OOrth.
8.CH.10AnapaiteCa2Fe2+(PO4)2 · 4H2OTric. 1 : P1
8.CH.15PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2OTric. 1 : P1
8.CH.20Dittmarite(NH4)Mg(PO4) · H2OOrth.
8.CH.20Niahite(NH4)(Mn2+,Mg)(PO4) · H2OOrth. mm2 : Pmn21
8.CH.25FrancoanelliteK3Al5(PO4)2(HPO4)3 · 12H2OTrig.
8.CH.25Taranakite(K,NH4)Al3(PO4)3(OH) · 9H2OTrig. 3m (3 2/m) : R3c
8.CH.30Schertelite(NH4)2MgH2(PO4)2 · 4H2OOrth.
8.CH.35Hannayite(NH4)2Mg3H4(PO4)4 · 8H2OTric. 1 : P1
8.CH.40Struvite(NH4)Mg(PO4) · 6H2OOrth. mm2
8.CH.40HazeniteKNaMg2(PO4)2 · 14H2OOrth. mm2
8.CH.45Rimkorolgite(Mg,Mn)5(Ba,Sr,Ca)(PO4)4 · 8H2OOrth.
8.CH.50BakhchisaraitseviteNa2Mg5(PO4)4 · 7H2OMon.
8.CH.55FahleiteCaZn5Fe3+2(AsO4)6 · 14H2OOrth.
8.CH.55SmolyaninoviteCo3Fe3+2(AsO4)4 · 11H2OOrth.
8.CH.60Barahonaite-(Al)(Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x · nH2OMon. 2/m : P2/b
8.CH.60Barahonaite-(Fe)(Ca,Cu,Na,Fe3+,Al)12Fe3+2(AsO4)8(OH,Cl)x · nH2OMon. 2/m : P2/b

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

40.1.1.1Struvite(NH4)Mg(PO4) · 6H2OOrth. mm2

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 Struvite-(K)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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)Hide

Localities for Struvite-(K)Hide

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.
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.
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