IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Archerite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About ArcheriteHide

Michael Archer
Formula:
(K,NH4)(H2PO4)
Colour:
White
Lustre:
Sub-Vitreous, Waxy, Greasy
Hardness:
1 - 2
Specific Gravity:
2.23 (Calculated)
Crystal System:
Tetragonal
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:
This page provides mineralogical data about Archerite.


Classification of ArcheriteHide

Approved
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
37.1.4.2

37 : ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
1 : Miscellaneous
19.1.7

19 : Phosphates
1 : Phosphates of the alkali metals

Physical Properties of ArcheriteHide

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

Optical Data of ArcheriteHide

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 ArcheriteHide

Formula:
(K,NH4)(H2PO4)
IMA Formula:
H2K(PO4)

Crystallography of ArcheriteHide

Crystal System:
Tetragonal
Class (H-M):
4 2m - Scalenohedral
Space Group:
I4 2d
Setting:
I4 2d
Cell Parameters:
a = 7.451 Å, c = 6.974 Å
Ratio:
a:c = 1 : 0.936
Unit Cell 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 DiffractionHide

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

Type Occurrence of ArcheriteHide

Synonyms of ArcheriteHide

Other Language Names for ArcheriteHide

German:Archerit
Spanish:Archerita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Biphosphammite2 photos of Archerite associated with Biphosphammite on mindat.org.

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.15Biphosphammite(NH4,K)(H2PO4)Tet. 4 2 2 : I41 2 2
8.AD.20Phosphammite(NH4)2(HPO4)Mon. 2/m : P21/b
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 - Dana Grouping (8th Ed.)Hide

37.1.4.1Biphosphammite(NH4,K)(H2PO4)Tet. 4 2 2 : I41 2 2

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.
19.1.8Biphosphammite(NH4,K)(H2PO4)Tet. 4 2 2 : I41 2 2
19.1.9Phosphammite(NH4)2(HPO4)Mon. 2/m : P21/b
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 ArcheriteHide

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

Localities for ArcheriteHide

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.
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  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 21, 2018 20:58:47 Page generated: October 5, 2018 01:43:28
Go to top of page