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Afwillite

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Alpheus Fuller Williams
Formula:
Ca3(HSiO4)2 · 2H2O
Colour:
Colourless, white
Lustre:
Vitreous
Hardness:
3 - 4
Specific Gravity:
2.630
Crystal System:
Monoclinic
Name:
Named in 1925 by John Parry and Frederick Eugene Wright in honor of Alpheus Fuller Williams [June 21, 1874 Oakland Alameda County California, USA - January 6, 1953 Cape Town, Western Cape, South Africa] of the De Beers Consolidated Mines of South Africa.
This page provides mineralogical data about Afwillite.


Hide all sections | Show all sections

Classification of AfwilliteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.AG.75

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
52.4.7.1

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
14.5.11

14 : Silicates not Containing Aluminum
5 : Silicates of Ca

Physical Properties of AfwilliteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless, white
Streak:
White
Hardness:
3 - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {101}, good on {100}
Fracture:
Conchoidal
Density:
2.630 g/cm3 (Measured)    2.643(5) g/cm3 (Calculated)

Optical Data of AfwilliteHide

Type:
Biaxial (+)
RI values:
nα = 1.617 nβ = 1.620 nγ = 1.634
2V:
Measured: 50° to 56°
Max Birefringence:
δ = 0.017
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v

Chemical Properties of AfwilliteHide

Formula:
Ca3(HSiO4)2 · 2H2O
IMA Formula:
Ca3(SiO4)(SiO2(OH)2) · 2H2O
Common Impurities:
Al,Fe,Mg,F

Crystallography of AfwilliteHide

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bb
Cell Parameters:
a = 16.278(1) Å, b = 5.6321(4) Å, c = 13.236(1) Å
β = 134.9°
Ratio:
a:b:c = 2.89 : 1 : 2.35
Unit Cell V:
859.55 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals are prismatic, tabular, radial fibrous spherulites, massive

Type Occurrence of AfwilliteHide

Other Language Names for AfwilliteHide

Dutch:Afwilliet
German:Afwillit
Italian:Afwillite
Latvian:Afvilīts
Spanish:Afwillita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Ettringite7 photos of Afwillite associated with Ettringite on mindat.org.
Andradite6 photos of Afwillite associated with Andradite on mindat.org.
Portlandite3 photos of Afwillite associated with Portlandite on mindat.org.
Hydrocalumite2 photos of Afwillite associated with Hydrocalumite on mindat.org.
Thaumasite1 photo of Afwillite associated with Thaumasite on mindat.org.
Brownmillerite-Srebrodolskite Series1 photo of Afwillite associated with Brownmillerite-Srebrodolskite Series on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AG.05AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05BrauniteMn2+Mn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05Braunite-IICaMn3+14(SiO4)O20Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.10LångbaniteMn2+4Mn3+9Sb5+O16(SiO4)2Trig. 3m : P3m1
9.AG.15MalayaiteCaSn(SiO4)OMon.
9.AG.15TitaniteCaTi(SiO4)OMon. 2/m : P21/b
9.AG.15VanadomalayaiteCaV4+(SiO4)OMon.
9.AG.15Natrotitanite(Na0.5Y0.5)Ti(SiO4)OMon. 2/m : B2/b
9.AG.15ŻabińskiiteCa[Al0.5(Ta,Nb)0.5)](SiO4)OTric. 1
9.AG.20Cerite-(Ce)(Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.20Cerite-(La)(La,Ce,Ca)9(Fe,Ca,Mg)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.20Aluminocerite-(Ce)(Ce,La,Ca)9(Al,Fe3+)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.25Trimounsite-(Y)Y2Ti2(SiO4)O5Mon.
9.AG.25Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
9.AG.25Mieite-(Y)Y4Ti(SiO4)2O[F,(OH)]6Orth. mmm (2/m 2/m 2/m) : Cmcm
9.AG.30SitinakiteKNa2Ti4(SiO4)2O5(OH) · 4H2OTet.
9.AG.35KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2OHex.
9.AG.40aNatisiteNa2Ti(SiO4)OTet.
9.AG.40bParanatisiteNa2Ti(SiO4)OOrth.
9.AG.45Törnebohmite-(Ce)(Ce,La)2Al(SiO4)2(OH)
9.AG.45Törnebohmite-(La)(La,Ce)2Al(SiO4)2(OH)
9.AG.50Kuliokite-(Y)Y4Al(SiO4)2(OH)2F5
9.AG.55ChantaliteCaAl2(SiO4)(OH)4Tet. 4/m : I41/a
9.AG.60MozartiteCaMn3+(SiO4)(OH)Orth. 2 2 2 : P21 21 21
9.AG.60VuagnatiteCaAl(SiO4)(OH)Orth.
9.AG.65HatruriteCa3(SiO4)OTrig.
9.AG.70JasmunditeCa11(SiO4)4O2STet. 4 2m : I4m2
9.AG.80BultfonteiniteCa2(HSiO4)F · H2OTric.
9.AG.85ZoltaiiteBaV4+2V3+12(SiO4)2O19Trig. 3 : P3
9.AG.90Tranquillityite(Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12Hex.

Related Minerals - Dana Grouping (8th Ed.)Hide

52.4.7.2BultfonteiniteCa2(HSiO4)F · H2OTric.
52.4.7.3HatruriteCa3(SiO4)OTrig.
52.4.7.4JasmunditeCa11(SiO4)4O2STet. 4 2m : I4m2

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.5.1WollastoniteCaSiO3Tric. 1 : P1
14.5.2Wollastonite-7TCaSiO3
14.5.3Wollastonite-2MCaSiO3Mon.
14.5.4RankiniteCa3Si2O7Mon. 2/m : P21/b
14.5.5KilchoaniteCa6(SiO4)(Si3O10)Orth.
14.5.6LarniteCa2SiO4Mon.
14.5.7BredigiteCa7Mg(SiO4)4Orth.
14.5.8HatruriteCa3(SiO4)OTrig.
14.5.9RosenhahniteHCa3[Si3O9(OH)]Tric.
14.5.10DellaiteCa6Si3O11(OH)2Tric.
14.5.12XonotliteCa6(Si6O17)(OH)2Mon. 2/m
14.5.13FoshagiteCa4(Si3O9)(OH)2Tric.
14.5.14HillebranditeCa2(SiO3)(OH)2Orth. mmm (2/m 2/m 2/m) : Cmcm
14.5.15JaffeiteCa6(Si2O7)(OH)6Trig. 3 : P3
14.5.16SuoluniteCa2(H2Si2O7) · H2OOrth.
14.5.17KillalaiteCa6.4(H0.6Si2O7)2(OH)2Mon.
14.5.18OkeniteCa10Si18O46 · 18H2OTric. 1 : P1
14.5.19RiversideiteCa5(HSi3O9)2 · 2H2OOrth.
14.5.20TrabzoniteCa4(Si3O9)(OH)2Orth. mm2 : Ama2
14.5.21GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric.
14.5.22FoshallasiteCa3[Si2O7] · 3H2O(?)
14.5.23Tobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)Orth.
14.5.24Clinotobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)Mon.
14.5.25NekoiteCa3Si6O15·7H2OTric. 1 : P1
14.5.26Plombièrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)Orth.
14.5.27JenniteCa9(Si3O9)2(OH)8 · 8H2OTric.

Other InformationHide

Electrical:
Piezoelectric
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 AfwilliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Parry, J., Wright, F.E. (1925) Afwillite, a new hydrous calcium silicate, from Dutoitspan mine, Kimberley, South Africa. Mineralogical Magazine: 20: 277-285.
Foshag, W.F. (1925) New minerals: new species. American Mineralogist: 10: 447-448.
Megaw, H.D. (1952) The structure of afwillite, Ca3(SiO3OH)2·2H2O. Acta Crystallographica: 5: 477-491.
Malik, K.M.A., Jeffery, J.W. (1976) A reinvestigation of the structure of afwillite. Acta Crystallographica: B32: 475-480.
Rastsvetaeva, R.K., Chukanov, N.V., Zadov, A.E. (2009) Refined structure of afwillite from the northern Baikal region. Crystallography Reports: 54: 418-422.

Internet Links for AfwilliteHide

Localities for AfwilliteHide

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.
Austria
 
  • Styria
    • Bad Radkersburg
      • Klöch
Walter Trattner collection
France
 
  • Auvergne-Rhône-Alpes
    • 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.
Germany
 
  • Bavaria
    • Franconia
      • Maroldsweisach
Pöllmann, H. (1991): Die Afwillit-Portlandit Paragenese im Basalt des Zeilbergs bei Maroldsweisach/Unterfranken. Aufschluss, 42, 257-266
  • 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
Schüller, W., Betz, V., Die Mineralien vom Emmelberg, Lapis 12/1986
      • Mayen
        • Ettringen
          • Bellerberg volcano
Hentschel, G. (1987): Die Mineralien der Eifelvulkane, Weise (München), 2. Auflage
            • Southern lava flow
              • Mayener Feld
Hentschel, G., Die Mineralien der Eifelvulkane, Weise (München), 1983
      • Mendig
        • Bell
Blass, G., Graf, HW., Kolitsch, U., Sebold, D., Über neue Mineralfunde aus der Vulkaneifel, MW 6/2005
      • Niederzissen
        • Brenk
Handbook of Mineralogy
Ireland
 
  • Co. Sligo
    • Killala Bay
Nawaz, R. (1974) Killalaite, a New Mineral from Co. Sligo, Ireland. Mineralogical Magazine, vol. 39, n° 305, 544-548.; Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, vol. 42, n° 322, 169-177 (referring to Nawaz)
Israel
 
  • Negev
Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
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
  • Tel Aviv District
GROSS, S., MAZOR, E., SASS, E., & ZAK., I. (1967). The mottled zone complex of Ayalon (Israel). Israel Bull. Earth Sciences, 16, 84-96.
Italy
 
  • 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
        • Valleranello
Luigi Matei photo
    • 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.
  • 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
    • 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
Japan
 
  • Honshu Island
    • Chugoku Region
      • Hiroshima prefecture
        • Hiba-gun
          • Kushiro
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
      • Okayama Prefecture
        • Ihara City (Ibara City)
          • Higashi-Mihara
KUSACHI, I., HENM, C., & HENMI, K. (1989). Afwillite and jennite from Fuka, Okayama Prefecture, Japan. Mineralogical Journal, 14, 279-292.
        • Takahashi City
          • Bicchu-cho (Bitchu-cho)
            • Fuka
KUSACHI, I., HENM, C., & HENMI, K. (1989). Afwillite and jennite from Fuka, Okayama Prefecture, Japan. Mineralogical Journal, 14, 279-292. ; Mineralogical Journal Vol. 14 (1989) , No. 7 pp 279-292; Henmi, C., & Kusachi, I. (1992). Clinotobermorite, Ca5Si6 (O, OH) 18· 5H2O, a new mineral from Fuka, Okayama Prefecture, Japan. Mineralogical Magazine, 56(3), 353-358.
Jordan
 
  • 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.
  • 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.
New Zealand
 
  • North Island
    • Northland
      • Kaipara
        • Tokatoka
Railton, G.L. & Watters, W.A., Minerals of New Zealand, New Zealand Geological Survey Bull. #104 (1990).
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.
Sokol, E.V., Gaskova, O.L., Kokh, S.N., Kozmenko, O.A., Seryotkin, Y.V., Vapnik, Y., Murashko, M.N. (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.
  • Caraş-Severin Co.
    • Banat Mts
Marincea, S., Dumitraş. D-G., Ghinet, C, Fransolet, A.-M., Hatert, F. & Rondeaux, M. (2011): Gehlenite from three occurrences of high-temperature skarns, Romania: new mineralogical data. Canadian Mineralogist. 49, 1001-1014
  • Harghita Co.
    • Odorheiu Secuiesc (Székelyudvarhely; Oderhellen)
      • Racoş (Racoşu de Jos)
Szakáll, S. & Kristály, F., Eds. (2010): Mineralogy of Székelyland, Eastern Transylvania, Romania. Csík County Nature and Conservation Society, Miercurea-Ciuc, Romania, 321 pp.
  • Hunedoara Co.
    • Hunedoara
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.
Russia
 
  • Eastern-Siberian Region
    • Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai)
      • Evenkia (Evenkiyskiy Autonomous okrug)
        • Nizhnyaya Tunguska River Basin (Lower Tunguska River)
No reference listed
    • Transbaikalia (Zabaykalye)
      • Buriatia Republic (Buryatia)
        • Dovyren Highlands
American Mineralogist, Volume 94, pages 323–333, 2009
  • Northern Caucasus Region
    • Kabardino-Balkarian Republic
      • Baksan Valley
Bailau, R., Gałuskin, E. V., Gazeev, V. M., & Gałuskina, I. O. Raman investigation of potential new mineral-Fe 3-analogue of wadalite from calcareous-silicate xenoliths of the Upper Chegem caldera, Northern Caucasus, Russia.
          • Lakargi Mt.
Galuskina, I.O., Krüger, B., Galuskin, E.V. ,Armbruster, T., Gazeev, V.M., Włodyka, R., Dulski, M. & Dzierżanowski, P. (2015): Fluorchegemite, Ca7(SiO4)3F2, a new mineral from the edgrewitebearing endoskarn zone of an altered xenolith in ignimbrites from Upper Chegem Caldera, Northern Caucasus, Kabardina-balkaria, Russia; Occurrence, crystal structure, and new data on the mineral assemblages. Canadian Mineralogist. 53, 325-344.
Galuskin, E.V., Galuskina, I.O., Gazeev, V.M., Dzierżanowski, P., Prusik, K., Pertsev, N.N., Zadov, A.E., Bailau, R., Gurbanov, A.G. (2011): Megawite, CaSnO3: a new perovskite-group mineral from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia. Mineralogical Magazine, 75, 2563-2572.
South Africa (TL)
 
  • Northern Cape Province
    • Francis Baard District
      • Kimberley
[Mineralogical Magazine(1925) 20, 277-285; Clark, 1993 - "Hey's Mineral Index, 3rd Edition"]
    • Kalahari manganese field
      • Hotazel
Minerals of South Africa
      • 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
UK
 
  • Northern Ireland
    • Co. Antrim
      • Glenoe
Nawaz, R. (1977). A second occurrence of killalaite. Mineralogical Magazine, 41, 546-548.
      • Larne
TILLEY, C. E. (1930). An association of afwillite and spurrite. Geological Magazine, 67, 168-169; 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; Strübel, Zimmer: "Lexikon der Minerale", 2nd Ed., 1991.; Mineralogical Magazine 1942 26 : 190-196
USA
 
  • California
    • Riverside Co.
      • Crestmore
        • Crestmore quarries
          • Sky Blue Hill
Switzer, G., & Bailey, E. H. (1953), Afwillite from Crestmore, California. American Mineralogist: 38: 629-633; Murdoch, Joseph (1954b), Scawtite and bultfonteinite from Crestmore, California: (abstract): Geological Society of America Bulletin: 65: 1347-1348.
  • Missouri
    • Washington Co.
      • Sullivan
R&M 73:2 pp 98-117
Mineral and/or Locality  
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