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Portlandite

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Formula:
Ca(OH)2
System:
Trigonal
Colour:
Colourless, light yellow
Hardness:
2½ - 3
Member of:
Name:
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.

Classification of Portlandite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
4/F.03-100
4.FE.05

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
6.2.1.4

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
7.4.12

7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths
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First Recorded Occurrence of Portlandite

Year of Discovery:
1933

Physical Properties of Portlandite

Pearly
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, light yellow
Hardness (Mohs):
2½ - 3
Tenacity:
Sectile
Cleavage:
Perfect
{0001}
Density:
2.227 - 2.233 g/cm3 (Measured)    2.24 g/cm3 (Calculated)

Crystallography of Portlandite

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

Optical Data of Portlandite

Type:
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:
Low

Chemical Properties of Portlandite

Formula:
Ca(OH)2
Essential elements:
All elements listed in formula:

Relationship of Portlandite to other Species

Member of:
Other Members of Group:
BruciteMg(OH)2
PyrochroiteMn(OH)2
4.FE.05Amakinite(Fe2+,Mg)(OH)2
4.FE.05BruciteMg(OH)2
4.FE.05PyrochroiteMn(OH)2
4.FE.05TheophrastiteNi(OH)2
4.FE.10BayeriteAl(OH)3
4.FE.10DoyleiteAl(OH)3
4.FE.10GibbsiteAl(OH)3
4.FE.10NordstranditeAl(OH)3
4.FE.15BöhmiteAlO(OH)
4.FE.15Lepidocrociteγ-Fe3+O(OH)
4.FE.20GrimaldiiteCrO(OH)
4.FE.20HeterogeniteCoO(OH)
4.FE.25FeitknechtiteMn3+O(OH)
4.FE.25Lithiophorite(Al,Li)MnO2(OH)2
4.FE.30QuenselitePbMnO2(OH)
4.FE.35FerrihydriteFe103+O14(OH)2
4.FE.40FeroxyhyteFe3+O(OH)
4.FE.40Vernadite(Mn4+,Fe3+,Ca,Na)(O,OH)2 · nH2O
4.FE.45QuetzalcoatliteZn6Cu3(TeO6)2(OH)6 · AgxPbyClx+2y
7.4.1BromelliteBeO
7.4.2BehoiteBe(OH)2
7.4.3ClinobehoiteBe(OH)2
7.4.4ChrysoberylBeAl2O4
7.4.5Magnesiotaaffeite-2N’2SMg3Al8BeO16
7.4.6Magnesiotaaffeite-6N’3SMg2BeAl6O12
7.4.7PericlaseMgO
7.4.8BruciteMg(OH)2
7.4.9SpinelMgAl2O4
7.4.10MeixneriteMg6Al2(OH)16(OH)2 · 4H2O
7.4.11LimeCaO
7.4.13ChlormayeniteCa12Al14O32Cl2
7.4.14HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
7.4.15MarokiteCaMn23+O4
7.4.16Ranciéite(Ca,Mn)Mn4O9 · 3H2O
7.4.17HollanditeBa(Mn64+Mn23+)O16
7.4.18Romanèchite(Ba,H2O)2Mn5O10
7.4.19Todorokite(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)6O12 · 3H2O

Other Names for Portlandite

Name in Other Languages:

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 Portlandite

Reference List:
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 Portlandite

Localities for Portlandite

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
 
  • 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
Belgium
 
  • Hainaut Province (Henegouwen; Hennegau)
    • Charleroi
      • Montignies-sur-Sambre
Rui Nunes collection
Canada
 
  • 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
China
 
  • 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
France
 
  • Auvergne
    • Puy-de-Dôme
      • Clermont-Ferrand
        • Ceyrat
XRD analysis (B. Devouard and E. Médard, Clermont-Ferrand)
  • Midi-Pyrénées
    • 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
  • Rhône-Alpes
    • Loire
      • La Pacaudière
        • Le Crozet
          • Les Rats Mine
Chollet, P. & Devouard, B. (2013): La mine de cuivre et de plomb des Rats, Le Crozet (Loire). Le Règne Minéral, 109, 7-46.
Germany
 
  • 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.
  • 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]
            • 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
Hungary
 
  • Nógrád Co.
    • Mátra Mts
      • Bátonyterenye
Szakáll-Jánosi: Minerals of Hungary
Israel
 
  • Negev
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
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.
Italy
 
  • 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 .
Jordan
 
http://www.natural-analogues.com/maqarin.htm
Mexico
 
  • Morelos
    • Cuernavaca
Ward's Natural Science Establishment specimen
Norway
 
  • Buskerud
    • Kongsberg
Bancroft, P., Nordrum, F.S. & Lyckberg, P.(2001): Kongsberg revisited. Mineralogical Record 32: 181-205
Palestine
 
  • 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.
Poland
 
  • 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
Romania
 
  • 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.
Russia
 
  • Eastern-Siberian Region
    • Transbaikalia (Zabaykalye)
      • Buriatia Republic (Buryatia)
        • Vitim Plateau
Pavel M. Kartashov data (2012)
  • 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
Sweden
 
  • Medelpad
    • Sundsvall
      • Alnö
Sandström, F., Binett, T., Wiklund, C. & Vikström, J. (2010): Alnöområdets geologi och mineralogi. Litiofilen. 27 (2) :14-42
Tajikistan
 
  • 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.
Tunisia
 
  • 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.
UK
 
  • Northern Ireland
    • Co. Antrim
      • Glenoe
Nawaz, R. (1977). A second occurrence of killalaite. Mineralogical Magazine, 41, 546-548. ; Henmi C, Kusachi I, Henmi K, Sabine P A, 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
      • 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.
USA
 
Minerals of Virginia 1990 by R. V. Dietrich
Mineral and/or Locality  
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