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Ettringite

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Formula:
Ca6Al2(SO4)3(OH)12 · 26H2O
System:
Trigonal
Colour:
Colourless; colourless ...
Hardness:
2 - 2½
Name:
After the type locality at Ettringen, Rhineland-Palatinate, Germany.
Ettringite Group.

Although it is generally assumed that a solid solution series between ettringite and thaumasite exists, both species have different space groups and a possible discontinuity was identified, characterised by a gap in the a-dimension of the solid solution phases (Barnett et al., 2000).

The Al analogue of bentorite.

Well-known as a synthetic phase in concrete.
Has been discussed as a potential phase for immobilisation of toxic metals.

Visit gemdat.org for gemological information about Ettringite.

Classification of Ettringite

Approved
7.DG.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
G : With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
31.10.2.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
10 : Miscellaneous
25.4.13

25 : Sulphates
4 : Sulphates of Ca, Sr and Ba
mindat.org URL:
http://www.mindat.org/min-1414.html
Please feel free to link to this page.

First Recorded Occurrence of Ettringite

Year of Discovery:
1874
Geological Setting of First Recorded Material:
In cavities of metamorphosed limestone inclusions in a leucite-nepheline-tephrite rock.

Physical Properties of Ettringite

Diaphaneity (Transparency):
Transparent
Colour:
Colourless; colourless in transmitted light.
Comment:
Turns white upon partial dehydration.
Hardness (Mohs):
2 - 2½
Cleavage:
Perfect
On {10_10}, perfect.
Density:
1.77 g/cm3 (Measured)    1.76 g/cm3 (Calculated)

Crystallography of Ettringite

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
P3 1c
Cell Parameters:
a = 11.23Å, c = 21.44Å
Ratio:
a:c = 1 : 1.909
Unit Cell Volume:
V 2,341.61 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals small and prismatic [0001], commonly without terminal faces.

Optical Data of Ettringite

Type:
Uniaxial (-)
RI values:
nω = 1.491 nε = 1.470
Max Birefringence:
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Comments:
Becomes uniaxial positive on dehydration.

Chemical Properties of Ettringite

Formula:
Ca6Al2(SO4)3(OH)12 · 26H2O
Essential elements:
All elements listed in formula:

Relationship of Ettringite to other Species

Other Members of Group:
BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2O
BuryatiteCa3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2O
CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2O
HielscheriteCa3Si(SO4)(SO3)(OH)6 · 11H2O
ImayoshiiteCa3Al(CO3)[B(OH)4](OH)6 · 12H2O
JouravskiteCa3Mn4+(SO4}(CO3)(OH)6 · 12H2O
KottenheimiteCa 3Si(SO4)2(OH)6·12H2O
Micheelsenite(Ca,Y)3Al(HPO4,CO3)(CO3)(OH)6 · 12H2O
SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2O
ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
7.DG.05DarapskiteNa3(SO4)(NO3) · H2O
7.DG.10Clinoungemachite(Na, K, Fe, SO4)
7.DG.10HumberstoniteNa7K3Mg2(SO4)6(NO3)2 · 6H2O
7.DG.10UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2O
7.DG.15BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2O
7.DG.15CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2O
7.DG.15JouravskiteCa3Mn4+(SO4}(CO3)(OH)6 · 12H2O
7.DG.15SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2O
7.DG.15ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
7.DG.15CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2O
7.DG.15BuryatiteCa3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
7.DG.20RapidcreekiteCa2(SO4)(CO3) · 4H2O
7.DG.20KorkinoiteCa4(SO4)2(CO3)2 · 9(H2O)
7.DG.25TatarskiteCa6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2O
7.DG.30NakauriiteCu8(SO4)4(CO3)(OH)6 · 48H2O
7.DG.35Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2O
7.DG.40CarlosruiziteK6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2O
7.DG.40FuenzalidaiteK6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2O
7.DG.45Chelyabinskite(Ca,Mg)3(SO4,CO3)2[Si(OH)6] · 9H2O (?)
25.4.1AnhydriteCaSO4
25.4.2BassaniteCaSO4 · 0.5H2O
25.4.3GypsumCaSO4 · 2H2O
25.4.4GlauberiteNa2Ca(SO4)2
25.4.5CesaniteNa3Ca2(SO4)3(OH)
25.4.6EugsteriteNa4Ca(SO4)3 · 2H2O
25.4.7HydroglauberiteNa10Ca3(SO4)8 · 6H2O
25.4.8SyngeniteK2Ca(SO4)2 · H2O
25.4.9GörgeyiteK2Ca5(SO4)6 · H2O
25.4.10PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
25.4.11Koktaite(NH4)2Ca(SO4)2 · H2O
25.4.12Ye'elimiteCa4Al6(SO4)O12
25.4.14BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2O
25.4.15CelestineSrSO4
25.4.16KalistrontiteK2Sr(SO4)2
25.4.17BaryteBaSO4

Other Names for Ettringite

Name in Other Languages:
Simplified Chinese:钙钒石
Spanish:Ettringita

Other Information

Other Information:
Readily soluble in dilute acids. Partially decomposed by water, rendering an alkaline solution.
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 Ettringite

Reference List:
Vom Rath, G. (1873): Über ein neues Mineral (Chalkomorphit) auf einem Einschluß in der Lava von Niedermendig, Annalen der Chemie und Physik, Ergänzungsband VI, 376-378

Lehmann, J. (1874): Untersuchungen über die Einwirkung eines feurig-flüssigen basaltischen Magmas auf Gesteins- und Mineraleinschlüsse, Verhandlungen des naturhistorischen Vereins der preußischen Rheinlande und Westfalens, Vol. 31, Cohen Bonn, p 1-40

Lehmann, J. (1874): Über den Ettringit, ein neues Mineral in Kalkeinschlüssen der Lava von Ettringen (Laacher Gebiet). N. Jb. Mineral. Geol. Paläont., 273-275.

Moses (1893) American Journal of Science: 45: 489.

Brauns, R.A. (1922) Die Mineralien der niederrheinischen Vulkangebiete. 225pp., 4to, Stuttgart: 173.

Bannister, M.A. (1935): Ettringite from Scawt Hill, Co. Antrim. Mineralogical Magazin, 24, 324-329.

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. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 589-590.

McConnell, Duncan & Joseph Murdoch (1962): Crystal chemistry of ettringite. Mineralogical Magazine: 33: 59-64.

Carpenter, A.B. (1963): Oriented overgrowths of thaumasite on ettringite. Am. Mineral. 48, 1394–1396.

McCarthy, Gregory J.; Hassett, David J.; Bender, Jason A. (1992): Synthesis, crystal chemistry and stability of ettringite, a material with potential applications in hazardous waste immobilization. Mater. Res. Soc. Symp. Proc. 245, 129-140.

Barnett, S.J., Adam, C.D. & Jackson, A.R.W. (2000): Solid solutions between ettringite and thaumasite. Journal of Materials Science 35, 4109-4114.

Barnett, S.J., Adam, C.D. & Jackson, A.R.W. (2001): An XRPD profile fitting investigation of the solid solution between ettringite, Ca6Al2(SO4)3(OH)12.26H2O and carbonate ettringite, Ca6Al2(CO3)3(OH)12.26H2O. Cement and Concrete Research, 31, 13-17.

Goetz-Neunhoeffer, F. and Neubauer, J. (2006): Refined ettringite (Ca6Al2(SO4)3(OH)12•26H2O) structure for quantitative X-ray diffraction analysis. Powder Diffr. 21, 4-11.

Moschner, G.; Lothenbach, B.; Winnefeld, F.; Ulrich, A.; Figi, R.; Kretzschmar, R. (2009): Solid solution between Al-ettringite and Fe-ettringite (Ca6[Al1-xFex(OH)6]2(SO4)3.26H2O). Cement and Concrete Research 39, 482-489.

Internet Links for Ettringite

Specimens:
The following Ettringite specimens are currently listed for sale on minfind.com.

Localities for Ettringite

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.
Austria
 
  • Lower Austria
    • Waldviertel
      • Persenbeug-Gottsdorf
        • Loja
Löffler, E. & Kolitsch, U. (2011): Die Mineralien der Loja bei Persenbeug, Niederösterreich (II). Mineralien-Welt. 22 (4): 51-62
  • Styria
    • Bad Radkersburg
      • Klöch
Postl, W. & Walter, F. (1983); R. Exel: Die Mineralien und Erzlagerstätten Österreichs, 1993
    • Leoben
      • Galgenberg
Annalen 1999, p.11-22
    • Stubalpe
      • Kleinfeistritz
        • Kothgraben (Kotgraben)
C.Auer (2012)
  • Tyrol
    • North Tyrol
      • Inn valley
        • Brixlegg - Schwaz area
          • Brixlegg - Rattenberg
            • St Gertraudi
Lapis 19 (7/8):69 (1994)
Belgium
 
  • Limburg Province
    • Dilsen-Stokkem
  • Namur Province
    • Andenne
No reference listed
France
 
  • Auvergne
    • Puy-de-Dôme
      • Clermont-Ferrand
        • Ceyrat
Grünhagen H and Mergoil J (1963) Découverte d'hydrocalumite et afwillite associées à l'ettringite dans les porcélanites de Boisséjour près Ceyrat (Puy de Dôme). Bulletin de la Société Française de Minéralogie et de Cristallographie 86: 149-157.
  • Midi-Pyrénées
    • Aveyron
      • Espalion
Boutry C., Pelisson P., Pillard F. (1986), Les zéolites d'Espalion, Le Cahier des Micromonteurs, n°2, pp: 3-7
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
 
  • Baden-Württemberg
    • Black Forest
      • Wolfach
        • Oberwolfach
          • Rankach valley
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
  • Bavaria
    • Franconia
      • Maroldsweisach
Pöllmann, H. (1991): Die Afwillit-Portlandit Paragenese im Basalt des Zeilbergs bei Maroldsweisach/Unterfranken. Aufschluss, 42, 257-266
    • Lower Bavaria
      • Untergriesbach
        • Kropfmühl-Untergriesbach Graphite Mining District
          • Kropfmühl
Habel, M. (2011): Neufunde aus dem östlichen Bayerischen Wald (VIII). Mineralien Welt. 22 (1),80-87
  • Hesse
    • Richelsdorf District
      • Süss
        • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Lower Saxony
    • Osnabrück
      • Georgsmarienhütte
Schnorrer, G., Stahlmann, W., Mollenkamp, A. (2001): Sekundärmineralisation in den Hochofenschlacken des Hüttenwerkes in Georgsmarienhütte, heutige Georgsmarienhütte GmbH. Aufschluss 52, 99-108.
  • North Rhine-Westphalia
    • Aachen
      • Eschweiler
      • Stolberg
International Association of Collectors of Slag; Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
    • Eifel
      • Mechernich
        • Kall
Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
    • Sauerland
      • Arnsberg
        • Hüsten
Weiss: "Mineralfundstellen, Deutschland West", 1990
  • Rhineland-Palatinate
    • Eifel
      • Daun
        • Hinterweiler
Blass, G., Emmerich, F., Graf, HW., Schäfer, Ch., Tschörtner, J., (2006): Minerale der Eifelvulkane, Version 1.0, CD, published by authors
        • Üdersdorf
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München, 1983
      • Gerolstein
        • Roth
Blaß, G. & Schüller, W. (2012): Der Rother Kopf in der Vulkaneifel. Lapis, 37 (3), 20-29.
      • Hillesheim
G. Blaß, F.J. Emmerich, H.W. Graf, Minerale der Vulkaneifel, DVD Version 2013/1.1
      • Mayen
        • Ettringen
          • Bellerberg volcano
Hentschel, G., Die Mineralien der Eifelvulkane, Weise (München), 1983
            • Northern Lava flow
Lehmann, J. (1874): Untersuchungen über die Einwirkung eines feurig-flüssigen basaltischen Magmas auf Gesteins- und Mineraleinschlüsse, Verhandlungen des naturhistorischen Vereins der preußischen Rheinlande und Westfalens, Vol. 31, Cohen Bonn, p 1-40
            • Southern lava flow
Lehmann, J. (1874): Untersuchungen über die Einwirkung eines feurig-flüssigen basaltischen Magmas auf Gesteins- und Mineraleinschlüsse, Verhandlungen des naturhistorischen Vereins der preußischen Rheinlande und Westfalens, Vol. 31, Cohen Bonn, p 1-40
Hentschel, G., Die Mineralien der Eifelvulkane, Weise (München), 1983
Peacor, D.R., Dunn, P.J., Simmons, W.B., Tillmanns, E., Fischer, R.X., (1984): Willhendersonite, a new zeolite isostructural with chabazite, Amer. Mineral. 69, 186-189
            • Western lava flow
Lehmann, J. (1874): Untersuchungen über die Einwirkung eines feurig-flüssigen basaltischen Magmas auf Gesteins- und Mineraleinschlüsse, Verhandlungen des naturhistorischen Vereins der preußischen Rheinlande und Westfalens, Vol. 31, Cohen Bonn, p 1-40
      • Mendig
        • Bell
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München, 1983
        • Niedermendig
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München, 1983
      • Niederzissen
        • Brenk
Hentschel, G., Ettringit vom Schellkopf bei Brenk in der Eifel, Der Aufschluss, 19, 198-200, 1968
    • Lahn valley
Wittern: "Mineralfundorte in Deutschland", 2001
        • Braubach
Schnorrer-Köhler, G. & David, W. (1991): Die Blei- und Silberhütte Braubach und ihre Haldenminerale. Lapis, 16 (1), 38-49; 58 (in German).
        • Frücht
Der Aufschluss Vol.55, March/April 2004
  • Saxony
    • Erzgebirge
      • Marienberg District
        • Lauta
Hajek, W. (2010): Kristallwelten Marienberg. Weise Verlag, München.
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Schnorrer-Köhler, G., Rewitzer, C., Standfuss, L. & Standfuss, K. (1988): Weitere Neufunde aus Lavrions antiken Schlacken. Lapis 13 (2), 11-14.
        • Passa Limani area
Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals of the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Sounion area
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian, (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Thorikos area
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Vrissaki area
Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
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
 
  • Basilicata
    • Potenza Province
      • Melfi
        • Vulture Mount
Stoppa, F., Jones, A.P., and Sharygin, V.V. (2009): Central European Journal of Geosciences 1(2), 131-151
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
        • Monte Somma
          • Ercolano
            • San Vito
Russo, M., Punzo, I. (2004): I minerali del Somma-Vesuvio, AMI
  • Latium
    • Rome Province
Caponera, I., Fiori, S., Pucci, R., & Signoretti, E. (2007). I minerali dei Colli Albani. Un aggiornamento sugli ultimi dieci anni di ricerche. Rivista Mineralogica Italiana, 31 (2), 74-91.
      • Rome
Luigi Mattei specimen
        • Valleranello
    • 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.
  • Tuscany
    • Livorno Province
      • Campiglia Marittima
http://www.comune.pisa.it/apsn/Articoli/Scorie/Capattoli.htm
      • Piombino
Franzini & Perchiazzi, 1992. I minerali delle scorie ferrifere di Baratti (Livorno). Atti Soc. Tosc. Sci. Nat., Mem., Serie A: 43-77
  • 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 .
  • Veneto
    • Padova Province
      • Galzignano Terme
        • Euganei Hills
Zorzi F. and Boscardin M. (2014): Minerali del Veneto. Alla scoperta dei tesori della nostra regione. Cierre Ed.. Sommacampagna (VR), p. 332.
    • Vicenza Province
      • Cornedo Vicentino
        • Spagnago
Lapis, 15 (12), 27-32+50.; Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
      • Laghi
Boscardin M., Daleffe A., Rocchetti I., Zordan A. “I minerali nel Vicentino”, Museo “G. Zannato”, Montecchio Maggiore (Vicenza), 2011.
      • Tretto di Schio
        • Val Munari
          • Contrade Maglio-Pornaro
- Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
Japan
 
  • Honshu Island
    • Tohoku Region
      • Fukushima Prefecture
Matsuyama, F. (2001)
Jordan
 
  • Amman
    • Hashem region
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
http://www.natural-analogues.com/maqarin.htm
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.
Rob Lavinsky; Rob Lavinsky
Ella V. Sokol, Olga L. Gaskova, Svetlana N. Kokh, Olga A. Kozmenko, Yuri V. Seryotkin, Yevgeny Vapnik, and Michail N. Murashko (2011): Chromatite and its Cr3+- and Cr6+-bearing precursor minerals from the Nabi Musa Mottled Zone complex, Judean Desert. American Mineralogist, 96, 659-674.
Romania
 
  • Brașov Co.
    • Racoş Commune
Szakáll, S., Kristály, F., 2010. Mineralogy of Székelyland, Eastern Transylvania, Romania. Sfântu Gheorghe-Miercurea Ciuc-Târgu Mureş. 2010.
  • Harghita Co.
    • Odorheiu Secuiesc (Székelyudvarhely; Oderhellen)
      • Racoş (Racoşu de Jos)
Szakáll, S., Almási, E., Köllı, A., Sajó, I., Vezzalini, G. (2006): New data about the minerals of the copper ore deposit at Balan (East Carpathians) and of limestone xenolithes from basalt at Racosu de Jos (Persani Mts.), Romania. Acta Mineral.-Petrogr., Abstr. Ser. 5, p. 112. [http://www.mineral.hermuz.hu/acta_05/pdf/szakalls1.pdf]
Russia
 
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
[World of Stones 12:49]
  • Northern Caucasus Region
    • Kabardino-Balkarian Republic
      • Verkhnechegemskaya caldera (Verkhni Chegem caldera; Upper Chegem caldera)
A. E. Zadov data
South Africa
 
  • Northern Cape Province
    • Kalahari manganese field
      • Black Rock
Rob Lavinsky photo
      • Hotazel
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) 279-302;
      • Kuruman
        • N'Chwaning Mines
No reference listed
Minerals of South Africa + Hochleitner, R. (1986). Sturmanit und Ettringit aus den Kalahari-Manganfeldern. LAPIS 11 (10), 19-24
Spain
 
  • Castile-La Mancha
    • Ciudad Real
Calvo, M., Calvo Sevillano, G., Viñals, J. y Sanz, A. (2010). Presencia de ettringita y thaumasita en vacuolas de los basaltos del Campo de Calatrava (Ciudad Real). Macla, 11, 53-54.
        • Bolaños de Calatrava
JRGL collection
Tuvalu
 
  • Funafuti Island
Mineralogical Magazine 1988 52 : 411-414.
UK
 
  • England
    • Cornwall
      • Camborne - Redruth - St Day District
        • Lanner
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
    • Cumbria
      • City of Carlisle District
        • Tindale (Tindale Fell)
Braithwaite, R.S.W., Lamb, R.P.H. and Nattrass, A.L. (2006): Secondary species associated with weathering of industrial residues at Tindale Fell Spelter Works, Cumbria. Journal of the Russell Society 9, 61-64.
    • Derbyshire
      • Ashover
        • Milltown
Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58; Ford, T., A. Sarjeant & M. Smith (1993) The minerals of the Peak district of Derbyshire UK Jour. Mines & Minerals 13:16-55
  • Northern Ireland
    • Co. Antrim
      • Larne
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.; Mineralogical Magazine 1942 26 : 190-196
  • Scotland
    • North West Highlands (Argyllshire)
      • Ardnamurchan
Mineralogical Magazine 1965 34 : 1-15.
USA
 
  • Arizona
    • Cochise Co.
      • Tombstone Hills
        • Tombstone District
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; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 217; Butler, B.S., et al (1938b), Geology and ore deposits of the Tombstone district, AZ, AZ Bur. Mines Bull. 143.
  • California
    • Riverside Co.
      • Crestmore
        • Crestmore quarries
          • Sky Blue Hill
Murdoch, Joseph & Robert A. Chalmers (1960), Ettringite (“woodfordite”) from Crestmore, California: American Mineralogist: 45: 1275-1278; Mineralogical Magazine (1962): 33: 59-64; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 180; Berry, Leonard G. (1963a), The unit cell of ettringite: American Mineralogist: 48: 939; Carpenter, A.B. (1963), Oriented Overgrowths of thaumasite on ettringite: American Mineralogist: 48: 1394-1395; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 265.
  • Vermont
    • Windham Co.
      • Putney
Rocks & Min. vol. 71, (1996); Rocks & Minerals, v. 71, no. 5, pg. 334
Minerals of Virginia 1990 by R. V. Dietrich
    • Highland Co.
Minerals of Virginia, 1990 by R. V. Dietrich
Mineral and/or Locality  
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