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Biphosphammite

Big Photo

Petrogale Cave, Madura Motel, Eucla, Western Australia, Australia
© 2008, JGW

Formula:
(NH
 
4
,K)H
 
2
PO
 
4
System:TetragonalHardness:1 - 2
This page provides mineralogical data about Biphosphammite.

Classification of Biphosphammite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/A.12-40
Nickel-Strunz 10th (pending) edition ID:8.AD.15

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 7th edition ID:37.1.4.1
Dana 8th edition ID:37.1.4.1

37 : ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
1 : Miscellaneous
Hey's CIM Ref.:19.1.8

19 : Phosphates
1 : Phosphates of the alkali metals
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Type Occurrence of Biphosphammite

Type Locality:Murra-el-elevyn Cave, Eucla, Nullarbor Plain, Western Australia, Australia
Year of Discovery:1870

Physical Properties of Biphosphammite

Hardness (Mohs):1 - 2

Crystallography of Biphosphammite

Crystal System:Tetragonal
Cell Parameters:a = 7.49Å, c = 7.34Å
Ratio:a:c = 1 : 0.98
Unit Cell Volume:V 411.77 ų (Calculated from Unit Cell)

Optical Data of Biphosphammite

Type:Uniaxial (-)
RI values: nω = 1.525 nε = 1.480
Maximum Birefringence:δ = 0.045

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Biphosphammite

Formula:
(NH
 
4
,K)H
 
2
PO
 
4
Essential elements:H, N, O, P
All elements listed in formula:H, K, N, O, P

Relationship of Biphosphammite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.AD.05Nahpoite
Na
 
2
HPO
 
4
8.AD.10Monetite
CaHPO
 
4
8.AD.10Weilite
CaHAsO
 
4
8.AD.10Švenekite
Ca(H
 
2
AsO
 
4
)
 
2
8.AD.15Archerite
(K,NH
 
4
)[H
 
2
PO
 
4
]
8.AD.20Phosphammite
(NH
 
4
)
 
2
HPO
 
4
8.AD.25Buchwaldite
NaCaPO
 
4
8.AD.30Schultenite
PbHAsO
 
4
8.AD.35Chernovite-(Y)
YAsO
 
4
8.AD.35Dreyerite
BiVO
 
4
8.AD.35Wakefieldite-(Ce)
(Ce,Pb)VO
 
4
8.AD.35Wakefieldite-(Y)
YVO
 
4
8.AD.35Xenotime-(Y)
YPO
 
4
8.AD.35Pretulite
ScPO
 
4
8.AD.35Xenotime-(Yb)
(Yb,Y,HREE)PO
 
4
8.AD.35Wakefieldite-(La)
LaVO
 
4
8.AD.40Pucherite
BiVO
 
4
8.AD.45Ximengite
BiPO
 
4
8.AD.50Gasparite-(Ce)
(Ce,REE)AsO
 
4
8.AD.50Monazite-(Ce)
(Ce,La,Nd,Th)PO
 
4
8.AD.50Monazite-(La)
(La,Ce,Nd)PO
 
4
8.AD.50Monazite-(Nd)
(Nd,La,Ce)PO
 
4
8.AD.50Rooseveltite
BiAsO
 
4
8.AD.50Cheralite
(Ca,Ce)(Th,Ce)[PO
 
4
]
 
2
8.AD.50Monazite-(Sm)
(Sm,Gd,Ce,Th)(PO
 
4
)
8.AD.50UM2005-35-VO:CaFePSiTh
(Th,Ca)[VO
 
4
,SiO
 
4
,PO
 
4
]
8.AD.55Tetrarooseveltite
Bi(AsO
 
4
)
8.AD.60Chursinite
(Hg-Hg)
 
0.5
Hg
2+
 
[AsO
 
4
]
8.AD.65Clinobisvanite
BiVO
 
4
Related Minerals - Hey's Index Grouping:

- +
19.1.1Lithiophosphate
Li
 
3
[PO
 
4
]
19.1.2Olympite
Na
 
5
Li[PO
 
4
]
 
2
19.1.3Nahpoite
Na
 
2
HPO
 
4
19.1.4Dorfmanite
Na
 
2
(PO
 
3
OH)·2H
 
2
O
19.1.5Nalipoite
NaLi
 
2
[PO
 
4
]
19.1.6Stercorite
NaNH
 
4
HPO
 
4
·4H
 
2
O
19.1.7Archerite
(K,NH
 
4
)[H
 
2
PO
 
4
]
19.1.9Phosphammite
(NH
 
4
)
 
2
HPO
 
4
19.1.10Lithiophilite
LiMn
2+
 
[PO
 
4
]
19.1.11Sicklerite
(LiMn
2+
 
,Fe
3+
 
)[PO
 
4
]
19.1.12Ferrisicklerite
(Fe
3+
 
,LiMn
2+
 
)[PO
 
4
]
19.1.13Triphylite
LiFe
2+
 
[PO
 
4
]
19.1.14Tavorite
LiFe
3+
 
[OH|PO
 
4
]
19.1.15Marićite
NaFe
2+
 
[PO
 
4
]
Related Minerals - Dana Grouping):

- +
37.1.4.2Archerite
(K,NH
 
4
)[H
 
2
PO
 
4
]

Other Names for Biphosphammite

Other Languages:
German:Biphosphammit
Russian:Бифосфаммит
Spanish:Biphosphammita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Biphosphammite

Reference List:Acta Crystallographica: B29: 2726-2732.

Internet Links for Biphosphammite

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    Localities for Biphosphammite

    Hide Locality List
    The 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. ? 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.
    Australia
     
    • Western Australia
      • Eucla
        • Madura Motel
    		Mineralogical Magazine (1974): 39: 889.-890.
    Mineralogical Magazine (1977): 41: 33-35.
      • Nullarbor Plain
        • Eucla
    		Min.Mag.(1972) 38, 965-967
    Botswana
     
    • North-West District
      • Maun
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    Peru
     
    • La Libertad Department
      • Trujillo Province
        • Virù
    		C U Sheppard (1870) Rural Carolinian, 1,471
    Saudi Arabia
     
    • Mintaqah Makkah
    		Saudi Geological Survey Open-File Report SGS-OF-2004-12, 68 p.
    Mineral and/or Locality
    Google
     
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