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Archerite

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Archerite, etc.

Petrogale Cave, Madura Roadhouse, Dundas Shire, Western Australia, Australia
Archerite

Cocklebiddy Cave, Cocklebiddy Roadhouse, Dundas Shire, Western Australia, Australia
Archerite, etc.

Petrogale Cave, Madura Roadhouse, Dundas Shire, Western Australia, Australia
Archerite

Cocklebiddy Cave, Cocklebiddy Roadhouse, Dundas Shire, Western Australia, Australia
Archerite, etc.

Petrogale Cave, Madura Roadhouse, Dundas Shire, Western Australia, Australia
Archerite

Cocklebiddy Cave, Cocklebiddy Roadhouse, Dundas Shire, Western Australia, Australia
Michael Archer
Formula:
H2KPO4
System:
Tetragonal
Colour:
White
Lustre:
Sub-Vitreous, Waxy, Greasy
Hardness:
1 - 2
Name:
Named in 1977 by Peter Bridge for Michael Archer (25 March 1945, Sydney, Australia - ), professor of Biology, University of New South Wales, Australia. While a curator for the Queensland Museum, Archer discovered Petrogale cave and collected samples that would contain the new mineral.
Isostructural with:
Biphosphammite
This page provides mineralogical data about Archerite.


Classification of Archerite

IMA status:
Approved
Strunz 8th ed.:
7/A.12-50
Nickel-Strunz 10th (pending) ed.:
8.AD.15

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 7th ed.:
37.1.4.2
Dana 8th ed.:
37.1.4.2

37 : ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
1 : Miscellaneous
Hey's CIM Ref.:
19.1.7

19 : Phosphates
1 : Phosphates of the alkali metals

Physical Properties of Archerite

Lustre:
Sub-Vitreous, Waxy, Greasy
Diaphaneity (Transparency):
Translucent
Colour:
White
Streak:
White
Hardness (Mohs):
1 - 2
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.23 g/cm3 (Calculated)
Comment:
Ranges to 2.34

Optical Data of Archerite

Type:
Uniaxial (-)
RI values:
nω = 1.511 - 1.513 nε = 1.468 - 1.470
Birefringence:
0.041
Max Birefringence:
δ = 0.043
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Optical Extinction:
parallel

Chemical Properties of Archerite

IMA Formula:
H2KPO4
Elements listed in formula:
H, K, O, P - search for minerals with similar chemistry

Crystallography of Archerite

Crystal System:
Tetragonal
Class (H-M):
4 2m - Scalenohedral
Space Group:
I4 2d
Space Group Setting:
I4 2d
Cell Parameters:
a = 7.451 Å, c = 6.974 Å
Ratio:
a:c = 1 : 0.936
Unit Cell Volume:
V 387.18 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Prismatic crystals with pyramids.
Comment:
Ranges a 7.453, b 6.972
X-Ray Powder Diffraction Data:
d-spacingIntensity
5.09 (10)
3.72 (100)
3.01 (10)
2.91 (80)
2.64 (20)
2.34 (10)
1.982 (10)
1.953 (50)
Comments:
ICDD 35-807, also 20-203

Occurrences of Archerite

Type Occurrence of Archerite

Type Locality:
Petrogale Cave, Madura Roadhouse, Dundas Shire, Western Australia, Australia
Geological Setting of Type Material:
Guano deposit
Associated Minerals at Type Locality:
WhitlockiteWhitlockiteWhitlockiteWeddelliteSyngenite
StercoriteHaliteBiphosphammiteAphthitalite

Relationship of Archerite to other Species

Related Minerals - Nickel-Strunz Grouping):
8.AD.05NahpoiteNa2(PO3OH)
8.AD.10MonetiteCa(PO3OH)
8.AD.10WeiliteCa(AsO3OH)
8.AD.10ŠvenekiteCa(AsO2(OH)2)2
8.AD.15Biphosphammite(NH4,K)H2PO4
8.AD.20Phosphammite(NH4)2(PO3OH)
8.AD.25BuchwalditeNaCaPO4
8.AD.30SchultenitePb(AsO3OH)
8.AD.35Chernovite-(Y)YAsO4
8.AD.35DreyeriteBiVO4
8.AD.35Wakefieldite-(Ce)CeVO4
8.AD.35Wakefieldite-(Y)YVO4
8.AD.35Xenotime-(Y)YPO4
8.AD.35PretuliteScPO4
8.AD.35Xenotime-(Yb)YbPO4
8.AD.35Wakefieldite-(La)LaVO4
8.AD.40PucheriteBiVO4
8.AD.45XimengiteBiPO4
8.AD.50Gasparite-(Ce)CeAsO4
8.AD.50Monazite-(Ce)CePO4
8.AD.50Monazite-(La)LaPO4
8.AD.50Monazite-(Nd)NdPO4
8.AD.50RooseveltiteBiAsO4
8.AD.50CheraliteCaTh(PO4)2
8.AD.50Monazite-(Sm)SmPO4
8.AD.50UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
8.AD.55TetrarooseveltiteBiAsO4
8.AD.60ChursiniteHg1+Hg2+(AsO4)
8.AD.65ClinobisvaniteBiVO4
Related Minerals - Hey's Index Grouping:
19.1.1LithiophosphateLi3PO4
19.1.2OlympiteLiNa5(PO4)2
19.1.3NahpoiteNa2(PO3OH)
19.1.4DorfmaniteNa2(PO3OH) · 2H2O
19.1.5NalipoiteNaLi2PO4
19.1.6Stercorite(NH4)Na(PO3OH) · 4H2O
19.1.8Biphosphammite(NH4,K)H2PO4
19.1.9Phosphammite(NH4)2(PO3OH)
19.1.10LithiophiliteLiMn2+PO4
19.1.11SickleriteLiMn2+PO4
19.1.12FerrisickleriteLi1-x(Fe3+,Mn2+)PO4
19.1.13TriphyliteLiFe2+PO4
19.1.14TavoriteLiFe3+PO4(OH)
19.1.15MarićiteNaFe2+PO4
Related Minerals - Dana Grouping):
37.1.4.1Biphosphammite(NH4,K)H2PO4

Other Names for Archerite

Synonyms:

IMA1975-008

Name in Other Languages:
German:Archerit
Spanish:Archerita

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 Archerite

Reference List:
West, J. (1930) XXVI. a quantitative X-ray analysis of the structure of potassium dihydrogen phosphate (KH2PO4). Zeitschrift für Kristallographie: 74 : 306-332.

Frazer, B.C., Pepinsky, R. (1952) Structural changes in the ferroelectric transition of KH2PO4. Physical Review: 85: 479-480.

Frazer, B.C., Pepinsky, R. (1953) X-ray analysis of the ferroelectric transition in KH2PO4. Acta Crystallographica: 6: 273-285.

Bridge, P.J. (1977) Archerite, (K,NH4)H2PO4, a new mineral from Madura, Western Australia. Mineralogical Magazine: 41: 33-35.

Fleischer, M., Pabst, A., Mandarino, J.A., Chao, G.Y. (1977) New Mineral Names. American Mineralogist: 62: 1057-1061.

Ono, Y., Yamada, N., Hikita, T. (1991) Structure refinements of the mixed crystal K0.78(NH4)0.22H2PO4 in the temperature range from 20 K to 250 K. Journal of the Physical Society of Japan: 60: 2673-2677.

Internet Links for Archerite

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    • Localities for Archerite

    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.
    Australia
     
    • Western Australia
      • Dundas Shire
        • Cocklebiddy Roadhouse
    		R Bottrill collection
    Mineralogical Magazine 39,467-469(1973)
        • Madura Roadhouse
    		Mineralogical Magazine (1977): 41: 33-35.
    Bahamas
     
    • San Salvador District
      • San Salvador Island
    		Onac B.P., Sumrall J., Mylroie J.E., Kearns J. (2009): Cave minerals of San Salvador Island, Bahamas. The University of South Florida karst studies series, 1, 70 pp.
    Namibia
     
    • Khomas Region
      • Windhoek District
    		[AmMin 84:193]
    Saudi Arabia
     
    • Mintaqah Makkah
    		Saudi Geological Survey Open-File Report SGS-OF-2004-12, 68 p.
    Mineral and/or Locality  
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