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Colourless, light yellow
2½ - 3
Specific Gravity:
2.227 - 2.233
Crystal System:
Member of:
In allusion to the occurrence of Ca(OH)2 as a product of hydration of portland cement.
Rare in nature, but an important phase in cement materials and concrete. Indicative of a very high pH value.

Hide all sections | Show all sections

Classification of PortlanditeHide

Approved, 'Grandfathered' (first described prior to 1959)

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
E : Hydroxides with OH, without H2O; sheets of edge-sharing octahedra

2 : X(OH)2

7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths

Physical Properties of PortlanditeHide

Colourless, light yellow
2½ - 3 on Mohs scale
2.227 - 2.233 g/cm3 (Measured)    2.24 g/cm3 (Calculated)

Optical Data of PortlanditeHide

Uniaxial (-)
RI values:
nω = 1.574 nε = 1.547
Max Birefringence:
δ = 0.027
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of PortlanditeHide


Crystallography of PortlanditeHide

Crystal System:
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Cell Parameters:
a = 3.59 Å, c = 4.9 Å
a:c = 1 : 1.365
Unit Cell V:
54.69 ų (Calculated from Unit Cell)
Minute hexagonal plates. Tabular {0001}, with {101¯0} as linear faces (artificial material).

Type Occurrence of PortlanditeHide

Other Language Names for PortlanditeHide

Relationship of Portlandite to other SpeciesHide

Member of:
Other Members of this group:
BruciteMg(OH)2Trig. 3m (3 2/m) : P3m1
PyrochroiteMn(OH)2Trig. 3m (3 2/m)

Common AssociatesHide

Associated Minerals Based on Photo Data:
Periclase4 photos of Portlandite associated with Periclase on
Spurrite4 photos of Portlandite associated with Spurrite on
Quartz4 photos of Portlandite associated with Quartz on
Ettringite4 photos of Portlandite associated with Ettringite on
Afwillite3 photos of Portlandite associated with Afwillite on
Thaumasite3 photos of Portlandite associated with Thaumasite on
Oldhamite3 photos of Portlandite associated with Oldhamite on
Fluorite3 photos of Portlandite associated with Fluorite on
Cuspidine3 photos of Portlandite associated with Cuspidine on
Vaterite1 photo of Portlandite associated with Vaterite on

Related Minerals - Nickel-Strunz GroupingHide

4.FE.05BruciteMg(OH)2Trig. 3m (3 2/m) : P3m1
4.FE.05PyrochroiteMn(OH)2Trig. 3m (3 2/m)
4.FE.05TheophrastiteNi(OH)2Trig. 3m (3 2/m) : P3m1
4.FE.10BayeriteAl(OH)3Mon. 2/m : P21/m
4.FE.10GibbsiteAl(OH)3Mon. 2/m
4.FE.10NordstranditeAl(OH)3Tric. 1 : P1
4.FE.15BöhmiteAlO(OH)Orth. mmm (2/m 2/m 2/m)
4.FE.15Lepidocrociteγ-Fe3+O(OH)Orth. mm2 : Cmc21
4.FE.25FeitknechtiteMn3+O(OH)Trig. 3m (3 2/m) : P3m1
4.FE.25Lithiophorite(Al,Li)MnO2(OH)2Trig. 3m (3 2/m) : R3m
4.FE.30QuenselitePbMnO2(OH)Mon. 2/m : P2/b
4.FE.40Vernadite(Mn4+,Fe3+,Ca,Na)(O,OH)2 · nH2OHex.
4.FE.45QuetzalcoatliteZn6Cu3(TeO6)2(OH)6 · AgxPbyClx+2yTrig. 3m (3 2/m) : P3m1

Related Minerals - Dana Grouping (8th Ed.)Hide 3m (3 2/m) : P3m1,Mg)(OH)2Trig. 3m (3 2/m) 3m (3 2/m) : P3m1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.4.1BromelliteBeOHex. 6mm : P63mc
7.4.2BehoiteBe(OH)2Orth. 2 2 2 : P21 21 21
7.4.3ClinobehoiteBe(OH)2Mon. 2 : P21
7.4.4ChrysoberylBeAl2O4Orth. mmm (2/m 2/m 2/m)
7.4.5Magnesiotaaffeite-2N’2SMg3Al8BeO16Hex. 6/mmm (6/m 2/m 2/m)
7.4.7PericlaseMgOIso. m3m (4/m 3 2/m) : Fm3m
7.4.8BruciteMg(OH)2Trig. 3m (3 2/m) : P3m1
7.4.9SpinelMgAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.4.10MeixneriteMg6Al2(OH)16(OH)2 · 4H2OTrig. 3m (3 2/m) : R3m
7.4.11LimeCaOIso. m3m (4/m 3 2/m)
7.4.13ChlormayeniteCa12Al14O32[◻4Cl2]Iso. 4 3m : I4 3d
7.4.14HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2OMon. 2 : P21
7.4.16Ranciéite(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2OTrig. 3 : P3
7.4.17HollanditeBa(Mn4+6Mn3+2)O16Mon. 2/m
7.4.18Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10Mon. 2/m
7.4.19Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2OMon. 2/m : P2/m

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 PortlanditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Tilley (1933), Mineralogical Magazine: 23: 419.
American Mineralogist (1934): 19: 35.
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 641-642.
American Mineralogist (1963): 48: 924-930.

Internet Links for PortlanditeHide

Localities for PortlanditeHide

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.
  • Victoria
    • Swan Hill Rural City
      • Lake Boga
Bill Birch (1996) Australian Journal of Mineralogy, 2, #2, 47-50.; W.D.Birch 1996. Portlandite and other recent mineral discoveries in the granites at Lake Boga, and Wycheproof and Pyramid Hill, Victoria. Australian Journal of Mineralogy Vol.2 No.2 Dec. 1996, pp. 47-50
  • Hainaut Province (Henegouwen; Hennegau)
    • Charleroi
      • Montignies-sur-Sambre
Rui Nunes collection
  • British Columbia
    • New Westminster Mining Division
      • Hope
Manor, M.J., Scoates, J.S., Nixon,G.T., and Ames, D.E. (2014): Platinum-group mineralogy of the Giant Mascot Ni-Cu-PGE
  • Québec
    • Laurentides
      • Deux-Montagnes RCM
        • Oka
Sokolov S.V. (2010) On portlandite from carbonatite complexes. Abstracts of XXVII International conference School «Geochemistry of Alkaline rocks». – Moscow-Koktebel’. pp. 240 pp.
    • Nord-du-Québec
      • Kativik
Daniel F. Rosa and Robert F. Martin (2010) A spurrite-, merwinite- and srebrodolskite-bearing skarn assemblage, West Clearwater Lake impact crater, northern Quebec. The Canadian Mineralogist (December 2010), 48(6):1519-1532
  • Shaanxi Province
    • Hanzhong Prefecture
      • Mian Co.
Zhongtang Yang, Zhiming Li, Gengbiao Qiao, Zhongbao Song, Xiaozhou Liu, and Wei Wan (2008): Geology and Prospecting 44(2), 38-44; Zhongtang Yang, Gengbiao Qiao, Zhiming Li, Xiaoyong Yang, Hongping Huang, Xianghua Lan, Zhongbao Song, Xiaozhou Liu, and Wei Wan (2009): Chinese Journal of Geology 44(1), 88-102
Czech Republic
  • Moravia (Mähren; Maehren)
    • South Moravia Region
      • Oslavany
Hršelová, P., Cempírek, J., Houzar, S., Sejkora, J. (2013): S,F,Cl-rich mineral assemblages from burned spoil heaps in the Rosice-Oslavany coalfield, Czech Republic. Can. Mineral.: 51(1): 171-188
  • Auvergne-Rhône-Alpes
    • Loire
      • La Pacaudière
        • Le Crozet
Chollet, P. & Devouard, B. (2013): La mine de cuivre et de plomb des Rats, Le Crozet (Loire). Le Règne Minéral, 109, 7-46.
    • Puy-de-Dôme
      • Clermont-Ferrand
        • Ceyrat
XRD analysis (B. Devouard and E. Médard, Clermont-Ferrand)
  • Occitanie
    • Aveyron
Eytier J.R. & Ch., Favreau G., Devouard B., Vigier J. (2004), Minéraux de pyrométamorphisme de Lapanouse-de Sévérac (Aveyron), Cahier des Micromonteurs, n°85, pp: 3-58
  • Bavaria
    • Franconia
      • Maroldsweisach
Pöllmann, H. (1991): Die Afwillit-Portlandit Paragenese im Basalt des Zeilbergs bei Maroldsweisach/Unterfranken. Aufschluss, 42, 257-266
  • North Rhine-Westphalia
    • Sauerland
      • Arnsberg
        • Hüsten
David Nieto collection, 5/93.
      • Iserlohn
        • Letmathe
Bender-Marl, D. & Krimmelbein-Altena, W. (1994) Aktuelle Übersicht: Mineralien der Zinkhütte Genna/Sauerland. Stand Juni 1994. Mineralien-Welt, 4/94, 10.
  • Rhineland-Palatinate
    • Eifel
      • Daun
        • Üdersdorf
Schüller, W., Betz, V., Die Mineralien vom Emmelberg, Lapis 12/1986
      • Mayen
        • Ettringen
          • Bellerberg volcano
[Jasmund, K., Hentschel, G., Seltene Mineralparagenesen in den Kalksteineinschlüssen der Lava des Ettringer Bellerberges bei Mayen (Eifel), Beitr. Minera. Petr. 10, 296-314, 1964] [Lapis, 15 (5), 9-36]
Galuskin, E.V., Krüger, B., Krüger, H., Blass, G., Widmer, R., Galuskina, I.O. (2016): Wernerkrauseite, CaFe3+2Mn4+O6 - the first non-stoichiometric post-spinel mineral, from Bellerberg volcano, Eifel, Germany. European Journal of Mineralogy, 28, 485-493
            • Southern lava flow
Hentschel, G. (1961): Seltene Mineralneubildungen in einem Kalksteineinschluß der Lava des Ettringer Bellerberges, Fortschritte Mineralogie, Vol. 39, 345
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
  • Nógrád Co.
    • Mátra Mts
      • Bátonyterenye
Szakáll-Jánosi: Minerals of Hungary
  • Negev
Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.; Mineralogical Magazine 1963 33 : 723-724.
Galuskin, E.V., Gfeller, F., Armbruster, T., Sharygin, V.V., Galuskina, I.O., Krivovichev, S.V., Vapnik, Y., Murashko, M., Dzierżanowski, P., Wirth, R. (2015): Mayenite supergroup, part III: Fluormayenite, Ca12Al14O32[□4F2], and fluorkyuygenite, Ca12Al14O32[(H2O)4F2], two new minerals from pyrometamorphic rocks of the Hatrurim Complex, South Levant. European Journal of Mineralogy, 27, 123-136
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
Russo, M., Punzo, I. (2004): I minerali del Somma-Vesuvio, AMI
  • Latium
    • Viterbo Province
      • Montalto di Castro
        • Pietra Massa Locality
Passaglia, E. & Turconi, B. (1982): Silicati ed altri minerali di Montalto di Castro - VT. Rivista Mineralogica Italiana, 4/1982, 97-110.
  • Liguria
    • Genova Province
      • Genova
        • Varenna Valley
Rivista Mineralogica Italiana, 22 (3), 39-41.
      • Ne
        • Graveglia Valley
          • Reppia
· Ciriotti, M.E., Möckel, S. (2004): Novità 2003 da Gambatesa: manganarsite (3° ritrovamento mondiale), calce (“lime”) e portlandite. Micro (UK report), 1/2004, 7-12. · Marchesini, M., Bracco, R., Ciriotti, M.E., Möckel, S. (2007): Niente "calce" e "portlandite" a Gambatesa. Micro (UK report), 1/2007, 67-68.
  • Umbria
    • Perugia Province
      • Spoleto
Stoppa F., Scordari F., Mesto E., Sharygin V.V. and Bortolozzi G. - Calcium-aluminium-silicate-hydrate "cement" phases and rare Ca-zeolite association at Colle Fabbri, Central Italy (2010). Centr.Eur.J.Geosci. 2 (2), pag. 175-187 .
  • Amman
Pitty, A. F., & Alexander, W. R. (2010). A natural analogue study of cement buffered, hyperalkaline groundwaters and their interaction with a repository host rock IV: an examination of the Khushaym Matruk (central Jordan) and Maqarin (northern Jordan) sites. NDA-RWMD Technical Report, NDA, Moors Row, UK.
    • Hashem region
      • Lisdan-Siwaga Fault
        • Siwaga
Sokol, E. V., Kokh, S. N., Khoury, H. N., Seryotkin, Y. V., & Goryainov, S. V. (2016). Long-term immobilisation of Cd 2+ at the Tulul Al Hammam natural analogue site, central Jordan. Applied Geochemistry, 70, 43-60.
  • Irbid
    • Maqarin area; Khoury, H. N., Salameh, E., & Abdul-Jaber, Q. (1985). Characteristics of an unusual highly alkaline water from the Maqarin area, northern Jordan. Journal of Hydrology, 81(1), 79-91.; Khoury, H. and Nassir, S. (1982): High temperature mineralization in the bituminous limestone in Maqarin area - North Jordan. Neues Jahrbuch für Mineralogie, Abhandlungen, 144, 197-213.
  • Morelos
    • Cuernavaca
Ward's Natural Science Establishment specimen
  • Buskerud
    • Kongsberg
Bancroft, P., Nordrum, F.S. & Lyckberg, P.(2001): Kongsberg revisited. Mineralogical Record 32: 181-205
  • Al Batinah Region (Ad Batinah Region)
    • Semail Ophiolite
      • Lower Semail Nappe
Neal, C., Stanger, G. (1984): Calcium and magnesium hydroxide precipitation from alkaline groundwaters in Oman, and their significance to the process of serpentinization. Mineralogical Magazine: 48: 237-241
  • West Bank
    • Hatrurim Formation
Galuskin, E.V., Gfeller, F., Armbruster, T., Sharygin, V.V., Galuskina, I.O., Krivovichev, S.V., Vapnik, Y., Murashko, M., Dzierżanowski, P., Wirth, R. (2015): Mayenite supergroup, part III: Fluormayenite, Ca12Al14O32[□4F2], and fluorkyuygenite, Ca12Al14O32[(H2O)4F2], two new minerals from pyrometamorphic rocks of the Hatrurim Complex, South Levant. European Journal of Mineralogy, 27, 123-136.
Shulamit Gross (1977) The mineralogy of the Hatrurim Formation, Israel. Geol. Surv. of Israel, bull. # 70.
  • Upper Silesia (Śląskie)
    • Upper Silesian Coal Basin
      • Katowice area
        • Siemianowice Śląskie
Kruszewski L. 2006: Oldhamite-periclase-portlandite-fluorite assemblage and coexisting minerals of burnt dump in Siemianowice Śląskie - Dąbrówka Wielka area (Upper Silesia, Poland) - preliminary report. Mineralogia Polonica Special Papers, vol.28, 118-120
  • Hunedoara Co.
    • Hunedoara
Marincea, Ş., Bilal, E., Verkaeren, J., Pascal, M.-L., and Fonteilles, M. (2001) Superposed paragenesis in spurrite-, tilleyite- and gehlenite-bearing skarns from Cornet Hill, Apuseni Mountains, Romania. Canadian Mineralogist: 39: 1435-1453.; Marincea, Ş., Dumitraş, D. G., Călin, N., Anason, A. M., Fransolet, A. M., & Hatert, F. (2013). Spurrite, tilleyite and associated minerals in the exoskarn zone from Cornet Hill (Metaliferi Massif, Apuseni Mountains, Romania). The Canadian Mineralogist, 51(3), 359-375.
  • Eastern-Siberian Region
    • Transbaikalia (Zabaykalye)
      • Buriatia Republic (Buryatia)
        • Vitim Plateau
Pavel M. Kartashov data (2012)
  • Northern Region
    • Murmanskaya Oblast'
Sokolov, S. V. (2014). Portlandite in rocks of carbonatite massifs. Geochemistry International, 52(8), 698-701.
      • Northern Karelia
Sokolov, S. V. (2014). Portlandite in rocks of carbonatite massifs. Geochemistry International, 52(8), 698-701.
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
          • Korkino
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 48
South Africa
  • Limpopo Province
    • Phalaborwa
      • Loolekop
Sokolov S.V. (2010) On portlandite from carbonatite complexes. Abstracts of XXVII International conference School «Geochemistry of Alkaline rocks». – Moscow-Koktebel’. pp. 240 pp.
  • Northern Cape Province
    • Kalahari manganese field
      • Black Rock
Minerals of South Africa
      • Hotazel
Speziale, S., Reichmann, H. J., Schilling, F. R., Wenk, H. R., & Monteiro, P. J. M. (2008). Determination of the elastic constants of portlandite by Brillouin spectroscopy. Cement and Concrete Research, 38(10), 1148-1153.
      • Kuruman
        • N'Chwaning Mines
[Von Bezing, K. L. et al. (1991) - The Kalahari (Afrique du Sud) manganese field : an update, Mineralogical Record, 22 (3), 279-302.]
Minerals of South Africa
  • Medelpad
    • Sundsvall
      • Alnö
Sandström, F., Binett, T., Wiklund, C. & Vikström, J. (2010): Alnöområdets geologi och mineralogi. Litiofilen. 27 (2) :14-42
  • Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni)
    • Pamir Mts
Sokolov S.V. (2010) On portlandite from carbonatite complexes. Abstracts of XXVII International conference School «Geochemistry of Alkaline rocks». – Moscow-Koktebel’. pp. 240 pp.; Sokolov, S. V. (2014). Portlandite in rocks of carbonatite massifs. Geochemistry International, 52(8), 698-701.
  • Siliana Governorate
    • Siliana
      • Djebel Sekarna
Dill, Weiss, Botz, Dohrmann, Paleontological, mineralogical and chemical studies of syngenetic and epigenetic Pb–Zn–Ba–P mineralizations at the stratotype of the K/P boundary, International Journal of Earth Sciences, Feb 2010.
  • Northern Ireland
    • Co. Antrim
      • Glenoe
Henmi, C., Kusachi, I., Henmi, K., Sabine, P.A., and Young, B.R. (1973) A new mineral bicchulite, the natural analogue of gehlenite hydrate, from Fuka, Okayama Prefecture, Japan and Carneal, County Antrim, Northern Ireland, Mineralogical Journal, 7, 243-251.; Nawaz, R. (1977) A second occurrence of killalaite. Mineralogical Magazine, 41, 546-548.
      • Larne
Mineralogical Magazine (1933): 23: 419-420; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 590.
Minerals of Virginia 1990 by R. V. Dietrich
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