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Schertelite

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About ScherteliteHide

Arnulf Schertel
Formula:
(NH4)2MgH2(PO4)2 · 4H2O
Colour:
Colourless
Lustre:
Vitreous
Crystal System:
Orthorhombic
Name:
Named in honour of Arnulf Schertel (24 February 1841, Munich, Germany - 11 March 1902, Dresden, Germany), Professor of Mineralogy, Freiberg Mining Academy, Saxony, Germany.
A phosphate mineral found in bat guano deposits.


Classification of ScherteliteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.CH.30

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
H : With large and medium-sized cations, RO4:H2O < 1:1
39.3.2.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous

Physical Properties of ScherteliteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless

Optical Data of ScherteliteHide

Type:
Biaxial (+)
RI values:
nα = 1.508 nβ = 1.515 nγ = 1.523
2V:
Measured: 90° , Calculated: 88°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none

Chemical Properties of ScherteliteHide

Formula:
(NH4)2MgH2(PO4)2 · 4H2O
IMA Formula:
(NH4)2Mg(PO3OH)2 · 4H2O

Crystallography of ScherteliteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 11.47 Å, b = 23.63 Å, c = 8.62 Å
Ratio:
a:b:c = 0.485 : 1 : 0.365
Unit Cell V:
2,336.33 ų (Calculated from Unit Cell)
Morphology:
Crystals small, indistinct, flat.

Type Occurrence of ScherteliteHide

Synonyms of ScherteliteHide

Other Language Names for ScherteliteHide

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.35Hannayite(NH4)2Mg3H4(PO4)4 · 8H2OTric. 1 : P1
8.CH.40Struvite(NH4)Mg(PO4) · 6H2OOrth. mm2
8.CH.40Struvite-(K)KMg(PO4)·6H2OOrth. mm2 : Pmn21
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

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 ScherteliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
MacIvor, R.W.E. (1887) On Australian bat guano and some minerals occurring therein. The Chemical News and Journal of Industrial Science, London: 55: 215-216. (as muellerite)
MacIvor, R.W.E. (1902) On minerals occurring in Australian bat guano. The Chemical News and Journal of Industrial Science, London: 85: 181-182. (as muellerite)
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: 699.
Frazier, A.W., Lehr, J.R., Smith, J.P. (1963) The magnesium phosphates hannayite, schertelite and bobierrite. American Mineralogist: 48: 635-641 .
Khan, A.A., Baur, W.H. (1972) Salt hydrates. VIII. The crystal structures of sodium ammonium orthochromate dihydrate and magnesium diammonium bis(hydrogen orthophosphate) tetrahydrate and a discussion of the ammonium ion. Acta Crystallographica: B28: 683-693.
Catti, M., Franchini-Angela, M. (1976) Hydrogen bonding in the crystalline state. Structure of Mg3(NH4)2(HPO4)4·8H2O (hannayite), and crystal-chemical relationships with schertelite and struvite. Acta Crystallographica: B32: 2842–2848.

Internet Links for ScherteliteHide

Localities for ScherteliteHide

ⓘ - 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.
Australia (TL)
 
  • Victoria
    • Corangamite Shire
      • Skipton
        • Mt. Widderin (Anderson's Hill)
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: 699; Clark, 1993 - "Hey's Mineral Index"; Mineralogical Magazine (1903): 376, 699.
Poland
 
  • Upper Silesia (Śląskie)
    • Upper Silesian Coal Basin
      • Rybnik Coal Area
        • Radlin
Łukasz Kruszewski (2012) Unique chloride assemblage of exhalative origin from burning coal-mining dump in Radlin (Rybnik Coal Area, S Poland). Mineralogical Society of Poland Special Papers 40
South Africa
 
  • Gauteng Province
    • Witwatersrand field
      • Johannesburg District (Central Rand)
        • Johannesburg
Handbook of Mineralogy; Martini, I. (1978). Mineralogy of the Transvaal caves. South African Journal of Geology, 81(1), 47-54.
Mineral and/or Locality  
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