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About PerhamiteHide

Ca3Al7.7Si3P4O23.5(OH)14.1 · 8H2O
Colourless, white, light brown, orange
Vitreous, Sub-Vitreous, Pearly
Specific Gravity:
Crystal System:
Member of:
Named in honor of Frank Croydon Perham (b. 5 March 1934), geologist and pegmatite miner of West Paris, Maine, USA, in honour of his dedicated labours in the recovery of mineral specimens.
Structurally related to crandallite but not a member of the Plumbogummite Group.

Visually similar to various crandallite-group minerals and iangreyite. See also krásnoite, a mineral closely related to perhamite.

Classification of PerhamiteHide

First Published:

D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4

5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen

17 : Silicates Containing other Anions
6 : Silicates with phosphate

Physical Properties of PerhamiteHide

Vitreous, Sub-Vitreous, Pearly
Transparent, Translucent
Vitreous on cleavage
Colourless, white, light brown, orange
Very brittle
Imperfect on {0001}
2.64 g/cm3 (Measured)    2.53 g/cm3 (Calculated)

Optical Data of PerhamiteHide

Uniaxial (+)
RI values:
nω = 1.564(2) nε = 1.577(4)
Max Birefringence:
δ = 0.013
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r > v moderate

Chemical Properties of PerhamiteHide

Ca3Al7.7Si3P4O23.5(OH)14.1 · 8H2O
IMA Formula:
Ca3Al7.7Si3P4O23.5(OH)14.1 · 8H2O
Common Impurities:

Crystallography of PerhamiteHide

Crystal System:
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
Cell Parameters:
a = 7.021 Å, c = 20.218 Å
a:c = 1 : 2.88
Unit Cell V:
863.11 ų (Calculated from Unit Cell)
Spherulitic masses of platy crystals.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014576PerhamiteMills S, Mumme G, Grey I, Bordet P (2006) The crystal structure of perhamite Mineralogical Magazine 70 201-2092006Emmons mine, Greenwood, Maine0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
6.71 Å(40)
6.08 Å(50)
5.80 Å(70)
3.51 Å(50)
3.12 Å(50)
3.01 Å(40)
2.88 Å(100)
1.76 Å(50)
NOTE: In the calculated patter, the strongest reflection is at d = 20.2 A. The powder diffraction pattern showed a close resemblance to that of iangreyite.

Type Occurrence of PerhamiteHide

General Appearance of Type Material:
Rosettes of pseudo-hexagonal plates; also earthy.
Place of Conservation of Type Material:
National History Museum, London - 1976,424; Smithsonian 135740.
Geological Setting of Type Material:
Originally from late stage mineralization in granite pegmatite. Subsequently found in oxidized zones of ore deposits.
Dunn, P., Appleman, D. (1977) Perhamite, a new calcium aluminum silico-phosphate mineral and a re-examination of viséite. Mineralogical Magazine: 41: 437-442.

Synonyms of PerhamiteHide

Other Language Names for PerhamiteHide


Relationship of Perhamite to other SpeciesHide

Member of:
Other Members of this group:
KrásnoiteCa3Al7.7Si3P4O23.5(OH)12.1F2 · 8H2OTrig. 3m (3 2/m) : P3m1
Chemically related to group(s):

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Perhamite associated with LipscombiteFe2+Fe3+2(PO4)2(OH)2
3 photos of Perhamite associated with TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
1 photo of Perhamite associated with MoriniteNaCa2Al2(PO4)2(OH)F4 · 2H2O
1 photo of Perhamite associated with WarditeNaAl3(PO4)2(OH)4 · 2H2O
1 photo of Perhamite associated with DescloizitePbZn(VO4)(OH)
1 photo of Perhamite associated with QuartzSiO2
1 photo of Perhamite associated with ChlorargyriteAgCl
1 photo of Perhamite associated with Columbite
1 photo of Perhamite associated with ChildreniteFe2+Al(PO4)(OH)2 · H2O
1 photo of Perhamite associated with Goethiteα-Fe3+O(OH)

Related Minerals - Nickel-Strunz GroupingHide

8.DO.05GirvasiteNaCa2Mg3(PO4)3(CO3)(H2O)6Mon. 2/m : P21/b
8.DO.10VoggiteNa2Zr(PO4)(CO3)(OH) · 2H2OMon. 2/m
8.DO.15PeisleyiteNa2Al9[(P,S)O4]8(OH)6 · 28H2OTric. 1 : P1
8.DO.20KrásnoiteCa3Al7.7Si3P4O23.5(OH)12.1F2 · 8H2OTrig. 3m (3 2/m) : P3m1
8.DO.25Saryarkite-(Y)Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7 · 6H2OTet. 4 2 2
8.DO.30Micheelsenite(Ca2Y)Al(PO3OH)(CO3)(OH)6 · 12H2OHex.
8.DO.40Parwanite(Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7 · 30H2OMon. 2 : P2
8.DO.45SkorpioniteCa3Zn2(PO4)2(CO3)(OH)2 · H2OMon. 2/m : B2/b

Related Minerals - Dana Grouping (8th Ed.)HideásnoiteCa3Al7.7Si3P4O23.5(OH)12.1F2 · 8H2OTrig. 3m (3 2/m) : P3m1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.6.1NagelschmidtiteCa7(SiO4)2(PO4)2Hex. 6 : P61
17.6.6Karnasurtite-(Ce)(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2OAmor.
17.6.7LomonosoviteNa5Ti2(Si2O7)(PO4)O2Tric. 1 : P1
17.6.8BornemaniteNa6BaTi2Nb(Si2O7)2(PO4)O2(OH)F Tric. 1 : P1
17.6.9SoboleviteNa13Ca2Mn2Ti3(Si2O7)2(PO4)4O3F3Mon. m : Pb
17.6.10Laplandite-(Ce)Na4CeTiPO4Si7O18 · 5H2OOrth. mmm (2/m 2/m 2/m) : Pmmm
17.6.11 VunonnemiteNa5TiNb3Si6O25F2 · 2Na3PO4
17.6.12Saryarkite-(Y)Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7 · 6H2OTet. 4 2 2
17.6.13Steenstrupine-(Ce)Na14Mn2+2Fe3+2Ce6Zr(Si6O18)2(PO4)6(PO3OH)(OH)2 · 2H2OTrig.
17.6.14WaylanditeBiAl3(PO4)2(OH)6Trig. 3m (3 2/m) : R3m
17.6.15Britholite-(Ce)(Ce,Ca)5(SiO4)3OHHex. 6/m : P63/m
17.6.16Britholite-(Y)(Y,Ca)5(SiO4)3OHHex. 6/m : P63/m

Fluorescence of PerhamiteHide

Not fluorescent

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 PerhamiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dunn, P., Appleman, D. (1977) Perhamite, a new calcium aluminum silico-phosphate mineral and a re-examination of viséite. Mineralogical Magazine: 41: 437-442.
Fleischer, M., Pabst, A., White, J.S. (1978) New mineral names. American Mineralogist: 63: 793-796.
Mills, S.J. (2003) A note on perhamite from the Moculta (Klemms) phosphate quarry, South Australia. Australian Journal of Mineralogy: 9(1): 43–5.
Mills, S., Mumme, G., Grey, I., Bordet, P. (2006) The crystal structure of perhamite. Mineralogical Magazine: 70: 201-209.
Locock, A.J., Ercit, T.S., Kjellman, J., Piilonen, C. (2006) New mineral names. American Mineralogist: 91: 1945-1954.
Ercit, T.S., Piilonen, P.C., Rowe, R. (2007) New mineral names. American Mineralogist: 92: 1539-1542.

Internet Links for PerhamiteHide

Localities for PerhamiteHide

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.
  • South Australia
    • Mt Lofty Ranges
      • North Mt Lofty Ranges
        • Barossa Valley
          • Angaston
Mills, S.J. (2003) A note on perhamite from the Moculta (Klemms) phosphate quarry, South Australia. Australian Journal of Mineralogy 9:1, 43-45.
Mills, S. J. (2003): A note on perhamite from the Moculta (Klemms) phosphate quarry, South Australia. Australian Journal of Mineralogy 9, 43-45. ; Francis, G.L., Peisley, V., 2012. Minerals from Penrice quarry and the phosphate deposits Klemms and St Kitts, Angaston, South Australia. (self published).; Mills, S. J., Groat, L. A., Wilson, S. A., Birch, W. D., Whitfield, P. S. & Raudsepp, M. (2008): Angastonite, CaMgAl2(PO4)2(OH) 4·7H2O, a new phosphate mineral from Angaston, South Australia, Mineralogical Magazine. 72 (5): 1011–1020
        • Kapunda
Francis, G.L., Peisley, V., 2012. Minerals from Fairview and St John's phosphate deposits, South Australia. (self published).
Mills, S. J. (2003): A note on perhamite from the Moculta (Klemms) phosphate quarry, South Australia. Australian Journal of Mineralogy 9, 43-45.
  • Carinthia
    • Spittal an der Drau District
      • Millstatt lake
Niedermayr, G. & Brandstätter, F. (2005)
      • Spittal an der Drau
        • Wolfsberg
H.Wippel, Spittal
  • Oruro
    • Dalence Province
      • Huanuni
Anatoly Kasatkin analysis on Richie Kosnar specimen.; Cacho, A.; Melgarejo, J.-C.; Camprubí, A.; Torró, L.; Castillo-Oliver, M.; Torres, B.; Artiaga, D.; Tauler, E.; Martínez, Á.; Campeny, M.; Alfonso, P.; Arce-Burgoa, O.R. (2019) Mineralogy and Distribution of Critical Elements in the Sn–W–Pb–Ag–Zn Huanuni Deposit, Bolivia. Minerals 9, 753
Czech Republic
  • Karlovy Vary Region
    • Cheb District
Breiter K., Škoda R., Veselovský F.: Neobvyklý P-, Li- a Sn-bohatý pegmatit z Vernéřova u Aše, Česká republika. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 2009, roč. 17, č. 1, s. 41-59.
  • South Bohemian Region
    • Písek District
Sejkora J., Cícha J., Jebavá I.: Minerální asociace fosfátů z Čížové u Písku (Česká republika). Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2011, 19, 1, 1-26.
  • Auvergne-Rhône-Alpes
    • Allier
      • Vichy
        • Échassières
Kolitsch, U., Gröbner, J. & Brandstätter, F. (2009): Neufunde von Les Montmins, Allier, Frankreich. Lapis 34 (11), 24-32; 54 (in German).
  • North Rhine-Westphalia
    • Arnsberg
      • Hochsauerlandkreis
        • Sundern
          • Hellefeld
Wittern: "Mineralfundorte in Deutschland", 2001
  • Østfold
    • Halden
      • Idd
        • Aspedammen
Kristiansen, R. (2014): Nye mineralfunn fra Herrebøkasa, Aspedammen, Østfold. Stein. 41 (3),30-33
  • Catalonia
    • Barcelona
      • Baix Llobregat
        • Gavà
Díaz-Acha, Y.; Campeny, M.; Tauler, E.; Bosch, J.; Melgarejo, J.C.; Camprubí, A.; Villanova-de-Benavent, C.; Jorge-Villar, S.E.; Díaz-Ontiveros, I.; Fernández-Lluch, D.; Proenza, J.A.; Andreazini, A.; Pastor, M. (2020) Critical Elements in Supergene Phosphates: The Example of the Weathering Profile at the Gavà Neolithic Mines, Catalonia, Spain. Minerals 10, 3.
  • Arkansas
    • Pike Co.
Roberts, A.C. et al (2003), The Canadian Mineralogist: 41(3): 721-725.
  • Maine
    • Oxford County
      • Greenwood
King, V. and Foord, E., 2000, Mineralogy of Maine, volume 2.
        • Uncle Tom Mountain
Rocks and Minerals (1980) 55:209-213; Mineral News (1991) 7:3 pp6,7,10; Falster, A. U., Simmons, W. B., Webber, K. L., Dallaire, D. A., Nizamoff, J. W., & Sprague, R. A. (2019). The Emmons Pegmatite, Greenwood, Oxford County, Maine. Rocks & Minerals, 94(6), 498-519.
      • Newry
King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed.), 2000, Mineralogy of Maine, V. 2.
Mineralogical Magazine 41,437-442(1977)
      • Paris
      • West Paris
King, V.T. (2000) Mineralogy of Maine; Volume 2: Mining History, Gems & Geology, Maine Geological Survey
  • Nevada
    • Humboldt Co.
      • Iron Point Mining District
        • Valmy
Dr. William S. Wise presentation to Northwest Micro Mineral Study Group on 1 May 2004, Update on Mineralogy of the Silver Coin Mine, Iron Point District, Edna Mountains, Humboldt Co., Nevada
  • Utah
    • Box Elder Co.
      • Pilot Range
        • Lucin Mining District
          • Lucin
            • Utahlite Hill
Joe Marty, Donald G. Howard, Henry Barwood (1999) Minerals of the Utahlite Claim, Lucin, Box Elder County, Utah. Utah Geological Survey Miscellaneous Publication 99-6.
Mineral and/or Locality  
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