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Perhamite

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About PerhamiteHide

Formula:
Ca3Al7.7Si3P4O23.5(OH)14.1 · 8H2O
Colour:
Colourless, white, light brown, orange
Lustre:
Vitreous, Sub-Vitreous, Pearly
Hardness:
5
Specific Gravity:
2.64
Crystal System:
Trigonal
Member of:
Name:
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

Approved
First Published:
1977
8.DO.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4
43.5.10.1

43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
17.6.2

17 : Silicates Containing other Anions
6 : Silicates with phosphate

Physical Properties of PerhamiteHide

Vitreous, Sub-Vitreous, Pearly
Transparency:
Transparent, Translucent
Comment:
Vitreous on cleavage
Colour:
Colourless, white, light brown, orange
Streak:
white
Hardness:
Tenacity:
Very brittle
Cleavage:
Imperfect/Fair
Imperfect on {0001}
Density:
2.64 g/cm3 (Measured)    2.53 g/cm3 (Calculated)

Optical Data of PerhamiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.564() 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:
Low
Dispersion:
r > v moderate

Chemical Properties of PerhamiteHide

Formula:
Ca3Al7.7Si3P4O23.5(OH)14.1 · 8H2O
IMA Formula:
Ca3Al7.7Si3P4O23.5(OH)14.1 · 8H2O
Common Impurities:
Ti,Fe,Mg,Na,F

Crystallography of PerhamiteHide

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3m1
Cell Parameters:
a = 7.021 Å, c = 20.218 Å
Ratio:
a:c = 1 : 2.88
Unit Cell V:
863.11 ų (Calculated from Unit Cell)
Morphology:
Spherulitic masses of platy crystals.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.71 (40)
6.08 (50)
5.80 (70)
3.51 (50)
3.12 (50)
3.01 (40)
2.88 (100)
1.76 (50)
Comments:
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.
Reference:
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

German:Perhamit
Spanish:Perhamita

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:
Lipscombite5 photos of Perhamite associated with Lipscombite on mindat.org.
Turquoise3 photos of Perhamite associated with Turquoise on mindat.org.
Morinite1 photo of Perhamite associated with Morinite on mindat.org.
Wardite1 photo of Perhamite associated with Wardite on mindat.org.
Descloizite1 photo of Perhamite associated with Descloizite on mindat.org.
Quartz1 photo of Perhamite associated with Quartz on mindat.org.
Chlorargyrite1 photo of Perhamite associated with Chlorargyrite on mindat.org.
Columbite1 photo of Perhamite associated with Columbite on mindat.org.
Childrenite1 photo of Perhamite associated with Childrenite on mindat.org.
Goethite1 photo of Perhamite associated with Goethite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.DO.05GirvasiteNaCa2Mg3(PO4)3(CO3)(H2O)6Mon. 2/m : P21/b
8.DO.10VoggiteNa2Zr(PO4)(CO3)(OH) · 2H2OMon.
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(Ca,Y)3Al(HPO4,CO3)(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.)Hide

43.5.10.2KrásnoiteCa3Al7.7Si3P4O23.5(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
17.6.3Viséite
17.6.4PhosinaiteNa13Ca2(Ce,La,Th,Nd,Pr)(Si4O12)(PO4)4
17.6.5ClinophosinaiteNa12(Ca,Sr)4(Si4O12)(PO4)4Mon.
17.6.6Karnasurtite-(Ce)(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2O
17.6.7LomonosoviteNa5Ti2(Si2O7)(PO4)O2Tric.
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 · 5H2O
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+2(Fe3+,Mn3+)2Ce6(Zr,Th)(Si6O18)2(PO4)6(HPO4)(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
17.6.17EylettersiteTh0.75Al3(PO4)2(OH)6Trig.

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.
Australia
 
  • 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.
Austria
 
  • Carinthia
    • Millstatt lake ridge
      • Spittal
        • Millstatt lake
Niedermayr, G. & Brandstätter, F. (2005)
        • Wolfsberg
H.Wippel, Spittal
Bolivia
 
  • Oruro Department
    • Dalence Province
      • Huanuni
Anatoly Kasatkin analysis on Richie Kosnar specimen.
Czech Republic
 
  • Karlovy Vary Region
    • Aš (Asch)
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 Bohemia Region
    • Písek
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.
France
 
  • Auvergne-Rhône-Alpes
    • Allier
      • Ébreuil
        • Échassières
Kolitsch, U., Gröbner, J. & Brandstätter, F. (2009): Neufunde von Les Montmins, Allier, Frankreich. Lapis 34 (11), 24-32; 54 (in German).
Germany
 
  • North Rhine-Westphalia
    • Sauerland
      • Sundern
        • Hellefeld
Wittern: "Mineralfundorte in Deutschland", 2001
Norway
 
  • Østfold
    • Halden
      • Idd
        • Aspedammen
Kristiansen, R. (2014): Nye mineralfunn fra Herrebøkasa, Aspedammen, Østfold. Stein. 41 (3),30-33
USA
 
  • Arkansas
    • Pike Co.
Roberts, A.C. et al (2003), The Canadian Mineralogist: 41(3): 721-725.
  • Maine
    • Oxford Co.
      • 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
      • 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)
      • West Paris
King, V.T. (2000) Mineralogy of Maine; Volume 2: Mining History, Gems & Geology, Maine Geological Survey
  • Nevada
    • Humboldt Co.
      • Iron Point 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 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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