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Phosphammite

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About PhosphammiteHide

Formula:
(NH4)2(HPO4)
Colour:
White
Lustre:
Dull, Earthy
Hardness:
1
Specific Gravity:
1.62
Crystal System:
Monoclinic
Name:
Named in 1870 by Charles Upham Shepard for the mineral's chemistry: a PHOSPHate of AMMonium
This page provides mineralogical data about Phosphammite.


Classification of PhosphammiteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.AD.20

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 7th ed.:
37.1.3.1
37.1.3.1

37 : ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
1 : Miscellaneous
19.1.9

19 : Phosphates
1 : Phosphates of the alkali metals

Physical Properties of PhosphammiteHide

Dull, Earthy
Transparency:
Translucent
Comment:
Due to fine-grained mineral.
Colour:
White
Streak:
White
Hardness:
Comment:
Due to fine-grained mineral.
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
1.62 g/cm3 (Measured)    1.61 g/cm3 (Calculated)

Optical Data of PhosphammiteHide

Type:
Biaxial (+)
RI values:
nα = 1.508 nβ = 1.518 nγ = 1.530
2V:
Measured: 80° to 85°, Calculated: 85°
Birefringence:
0.022
Max Birefringence:
δ = 0.022
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 PhosphammiteHide

Formula:
(NH4)2(HPO4)
IMA Formula:
(NH4)2(PO3OH)

Crystallography of PhosphammiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.03 Å, b = 6.68 Å, c = 11.02 Å
β = 113.6°
Ratio:
a:b:c = 1.202 : 1 : 1.65
Unit Cell V:
541.68 ų (Calculated from Unit Cell)
Z:
4
Comment:
AC 10:709 (1957)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.57 (75)
5.05 (100)
4.94 (65)
4.13 (40)
3.78 (50)
3.22 (65)
3.14 (45)
3.06 (45)
(
Comments:
Synthetic (ICDD 29-0111); also 9-391.

Type Occurrence of PhosphammiteHide

Place of Conservation of Type Material:
Western Australian Museum, Perth, Australia (neotype)
Geological Setting of Type Material:
guano deposit

Synonyms of PhosphammiteHide

Other Language Names for PhosphammiteHide

Common AssociatesHide

Ammonium-AphthitaliteNa(K,NH4)SO4
UreaCO(NH2)2
WeddelliteCa(C2O4) · (2.5-x)H2O

Related Minerals - Nickel-Strunz GroupingHide

8.AD.05NahpoiteNa2HPO4Mon. 2/m : P21/m
8.AD.10MonetiteCa(HPO4)Tric. 1
8.AD.10WeiliteCa(HAsO4)Tric. 1 : P1
8.AD.10ŠvenekiteCa(H2AsO4)2Tric. 1 : P1
8.AD.15Archerite(K,NH4)(H2PO4)Tet. 4 2m : I4 2d
8.AD.15Biphosphammite(NH4,K)(H2PO4)Tet. 4 2 2 : I41 2 2
8.AD.25BuchwalditeNaCa(PO4)Orth. mm2 : Pmn21
8.AD.30SchultenitePb(HAsO4)Mon. 2/m : P2/b
8.AD.35Chernovite-(Y)Y(AsO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35DreyeriteBi(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Wakefieldite-(Ce)Ce(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Wakefieldite-(Y)Y(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Xenotime-(Y)Y(PO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35PretuliteSc(PO4)Tet.
8.AD.35Xenotime-(Yb)Yb(PO4)Tet.
8.AD.35Wakefieldite-(La)La(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.40PucheriteBi(VO4)Orth. mmm (2/m 2/m 2/m)
8.AD.45XimengiteBi(PO4)Trig.
8.AD.50Gasparite-(Ce)Ce(AsO4)
8.AD.50Monazite-(Ce)Ce(PO4)Mon. 2/m : P21/b
8.AD.50Monazite-(La)La(PO4)
8.AD.50Monazite-(Nd)Nd(PO4)
8.AD.50RooseveltiteBi(AsO4)Mon. 2/m
8.AD.50CheraliteCaTh(PO4)2Mon. 2/m
8.AD.50Monazite-(Sm)Sm(PO4)Mon. 2/m : P21/m
8.AD.50UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
8.AD.55TetrarooseveltiteBi(AsO4)Tet.
8.AD.60Chursinite(Hg+2)0.5Hg2+(AsO4)Mon. 2/m : P21/b
8.AD.65ClinobisvaniteBi(VO4)Mon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.1.1LithiophosphateLi3PO4Orth. mm2 : Pmn21
19.1.2OlympiteNa5Li(PO4)2Orth.
19.1.3NahpoiteNa2HPO4Mon. 2/m : P21/m
19.1.4DorfmaniteNa2HPO4 · 2H2OOrth.
19.1.5NalipoiteNaLi2PO4Orth.
19.1.6StercoriteNa(NH4)HPO4 · 4H2OTric.
19.1.7Archerite(K,NH4)(H2PO4)Tet. 4 2m : I4 2d
19.1.8Biphosphammite(NH4,K)(H2PO4)Tet. 4 2 2 : I41 2 2
19.1.10LithiophiliteLiMn2+PO4Orth. mmm (2/m 2/m 2/m) : Pmna
19.1.11SickleriteLi1-x(Mn3+xMn2+1-x)PO4Orth.
19.1.12FerrisickleriteLi1-x(Fe3+xFe2+1-x)PO4Orth.
19.1.13TriphyliteLiFe2+PO4Orth. mmm (2/m 2/m 2/m) : Pmna
19.1.14TavoriteLiFe3+(PO4)(OH)Tric. 1 : P1
19.1.15MarićiteNaFe2+(PO4)Orth. mmm (2/m 2/m 2/m) : Pmna

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 PhosphammiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bridge, P.J.: "Urea, a new mineral, and neotype phosphammite from Western Australia":Mineralogical Magazine (1973): 39: 346-348.
Smith, J.P., L.R.Lehr, & W.E. Brown: (1957): "Crystallographic properties of diammonium phosphate": Acta Cryst:10:709.

Internet Links for PhosphammiteHide

Localities for PhosphammiteHide

ⓘ - 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)
 
  • Western Australia
    • Laverton Shire
      • Lake Rason
Mineralogical Magazine(1973) 39, 346-348
Mineralogical Magazine (1973): 39: 346-348.
Peru
 
  • La Libertad Department
    • Virù Province
Mineralogical Magazine (1973): 39, 346-348.
Mineral and/or Locality  
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