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Foshagite

A valid IMA mineral species - grandfathered
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05319180014958690887541.jpg
Foshagite

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
08390450014949181115500.jpg
Foshagite

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
00301100014948428693138.jpg
Foshagite, etc.

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
04234550014949181116541.jpg
Foshagite

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
08390450014949181115500.jpg
Foshagite

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
06021280015061696824761.jpg
Foshagite, etc.

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
05319180014958690887541.jpg
Foshagite

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
08390450014949181115500.jpg
Foshagite

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
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About FoshagiteHide

01519440014948428662439.jpg
William Frederick Foshag
Formula:
Ca4(Si3O9)(OH)2
Colour:
White
Lustre:
Silky
Hardness:
3
Specific Gravity:
2.73
Crystal System:
Triclinic
Name:
Named in 1925 by Arthur S. Eakle in honor of William Frederick Foshag [March 17, 1894 Sag Harbor, New York, USA - May 21, 1956 Westmoreland Hills, Maryland, USA], chemist and mineralogist, curator of minerals at the Smithsonian Institution.
Dimorph of:
Trabzonite
This page provides mineralogical data about Foshagite.


Unique IdentifiersHide

Mindat ID:
1585
Long-form identifier:
mindat:1:1:1585:7
GUID
(UUID V4):
17651950-0712-44de-9a4b-ce3fe03e970b

IMA Classification of FoshagiteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ca4(SiO3)3(OH)2
First published:
1925
Type description reference:
Eakle, Arthur S. (1925) Foshagite, a new silicate from Crestmore, California. American Mineralogist, 10 (4) 97-99

Classification of FoshagiteHide

Strunz-mindat (2024):
9.DG.15

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
Dana 8th ed.:
65.2.2.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
2 : Single-Width Unbranched Chains, W=1 with chains P=3
Hey's CIM Ref.:
14.5.13

14 : Silicates not Containing Aluminum
5 : Silicates of Ca

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
FosIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Siivolam & Schmid (2007)Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download
FosWhitney & Evans (2010)Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371
FosThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download
FosWarr (2020)Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30

Physical Properties of FoshagiteHide

Lustre:
Silky
Transparency:
Translucent
Colour:
White
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct {001}
Density:
2.73 g/cm3 (Measured)    2.74 g/cm3 (Calculated)
Comment:
Measured with a pycnometer

Optical Data of FoshagiteHide

Type:
Biaxial (+)
RI values:
nα = 1.594 nβ = 1.594 nγ = 1.598
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong

Chemistry of FoshagiteHide

Mindat Formula:
Ca4(Si3O9)(OH)2
Elements listed:
Ca, H, O, Si - search for minerals with similar chemistry
Common Impurities:
Al,Fe,Mg

Crystallography of FoshagiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 10.32 Å, b = 7.36 Å, c = 14.07 Å
β = 106.4°
Ratio:
a:b:c = 1.402 : 1 : 1.912
Unit Cell V:
nan ų (Calculated from Unit Cell)
Z:
2
Comment:
Monoclinic. Point Group: 2/m; 2; or m: Space Group: A-centered.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009245FoshagiteGard J A, Taylor H F W (1960) The crystal structure of foshagite Acta Crystallographica 13 785-7931960Crestmore, California, USA0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.92 Å(very very strong)
1.74 Å(very strong and broad)
6.8 Å(medium strong)
4.95 Å(medium strong)
3.37 Å(medium strong)
2.30 Å(medium strong)
2.16 Å(medium strong)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
31 : Thermally altered carbonate, phosphate, and iron formations
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
51 : Pyrometamorphic minerals (see also #54 and #56)<0.36

Type Occurrence of FoshagiteHide

Co-Type Localities:
ⓘ Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
ⓘ Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
General Appearance of Type Material:
White veins of very compact fibrous structure with the fibers perfectly parallel and several inches long
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 95229
Geological Setting of Type Material:
Thermally altered limestone
Associated Minerals at Type Locality:
VesuvianiteThaumasiteCalcite
Reference:
Eakle, A.S. (1925) Foshagite, a new silicate from Crestmore, California. American Mineralogist: 10: 97-99.
Download:
https://rruff.info/rruff_1.0/uploads/AM10_97.pdf

Other Language Names for FoshagiteHide

German:Foshagit
Spanish:Foshagita

Common AssociatesHide

Associated Minerals Based on Photo Data:
10 photos of Foshagite associated with VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
4 photos of Foshagite associated with CalciteCaCO3
3 photos of Foshagite associated with Blue DiopsideCaMgSi2O6
3 photos of Foshagite associated with MonticelliteCaMgSiO4

Related Minerals - Strunz-mindat GroupingHide

9.DG.CalcinaksiteKNaCa(Si4O10) · H2OTric. 1 : P1
9.DG.Barrydawsonite-(Y)Na1.5Y0.5CaSi3O8(OH)Mon. 2/m : P21/b
9.DG.ParatobermoriteCa4(Al0.5Si0.5)2Si4O16(OH)(H2O)2 · (Ca · 3H2O)Mon. 2/m
9.DG.EnricofrancoiteKNaCaSi4O10Tric. 1 : P1
9.DG.AlvesiteNaKZrSi6O15 · 2H2OOrth. mmm (2/m 2/m 2/m)
9.DG.02SteedeiteNaMn2[Si3BO9](OH)2Tric. 1 : P1
9.DG.02NolzeiteNaMn2[Si3BO9](OH)2 · 2H2OTric. 1 : P1
9.DG.05BustamiteCaMn2+(Si2O6)Tric. 1 : P1
9.DG.05FerrobustamiteCaFe2+(Si2O6)Tric. 1
9.DG.05PectoliteNaCa2Si3O8(OH)Tric. 1 : P1
9.DG.05SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
9.DG.05WollastoniteCa3(Si3O9)Tric. 1 : P1
9.DG.05Wollastonite-1ACaSiO3Tric. 1 : P1
9.DG.05TanohataiteLiMn2Si3O8(OH)Tric. 1 : P1
9.DG.05SchizoliteNaCaMnSi3O8(OH)Tric. 1 : P1
9.DG.05MurakamiiteLiCa2Si3O8(OH)Tric. 1 : P1
9.DG.05DalnegorskiteCa5Mn(Si3O9)2Tric. 1 : P1
9.DG.07CascanditeCaScSi3O8(OH)Tric. 1
9.DG.08Plombièrite[Ca4Si6O16(OH)2 · 2H2O] · (Ca · 5H2O)Orth.
9.DG.10Clinotobermorite[Ca4Si6O17 · 2H2O] · (Ca · 3H2O)Mon.
9.DG.10RiversideiteCa5(HSi3O9)2 · 2H2OOrth.
9.DG.10TobermoriteCa4Si6O17(H2O)2 · (Ca · 3H2O)Mon. 2 : P21
9.DG.12JusiteNa2Ca15Al4Si16O54 · 17H2O
9.DG.12KenotobermoriteCa4Si6O15(OH)2(H2O)2 · 3H2OMon.
9.DG.20JenniteCa9(Si3O9)2(OH)8 · 8H2OTric. 1 : P1
9.DG.20KameneviteK2TiSi3O9 · H2OOrth. 2 2 2 : P21 21 21
9.DG.25ParaumbiteK3Zr2H(Si3O9)2 · nH2OOrth. mm2
9.DG.25UmbiteK2(Zr,Ti)Si3O9 · H2OOrth. 2 2 2 : P21 21 21
9.DG.30SørenseniteNa4SnBe2Si6O16(OH)4Mon. 2/m : B2/b
9.DG.32Escheite Ca2NaMnTi5[Si12O34]O2(OH)3 · 12H2OOrth. mm2 : Ama2
9.DG.35XonotliteCa6(Si6O17)(OH)2Mon. 2/m : B2/m
9.DG.40HillebranditeCa2(SiO3)(OH)2Orth. mmm (2/m 2/m 2/m) : Cmcm
9.DG.45ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2OOrth.
9.DG.45ChivruaiiteCa4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
9.DG.50Haineaultite(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2OOrth. 2 2 2 : C2 2 2
9.DG.55EpididymiteNa2Be2Si6O15 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
9.DG.60EudidymiteNa2Be2Si6O15 · H2OMon. 2/m : B2/b
9.DG.65ElpiditeNa2ZrSi6O15 · 3H2OOrth.
9.DG.65PatyniteNaKCa4[Si9O23]Tric. 1 : P1
9.DG.67WhelaniteCu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2OOrth. mm2 : Pnn2
9.DG.70Fenaksite(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)Tric. 1 : P1
9.DG.70LitidioniteCuNaKSi4O10Tric. 1 : P1
9.DG.70ManaksiteKNaMnSi4O10Tric. 1 : P1
9.DG.70YusupoviteNa2Zr(Si6O15) · 2.5H2OMon. 2/m : B2/m
9.DG.75TinaksiteK2Na(Ca,Mn2+)2TiO[Si7O18(OH)]Tric.
9.DG.75TokkoiteK2Ca4[Si7O18(OH)](OH,F)Tric.
9.DG.75SenkevichiteCsKNaCa2TiO[Si7O18](OH)Tric. 1 : P1
9.DG.80CanasiteK3Na3Ca5Si12O30(OH)4Mon. m : Bm
9.DG.80FluorcanasiteK3Na3Ca5Si12O30F4 · H2OMon. m : Bm
9.DG.85MiseriteK1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2OTric.
9.DG.90FrankameniteK3Na3Ca5(Si12O30)(F,OH)4 · H2OTric. 1 : P1
9.DG.92Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2OMon. 2/m : P21/m
9.DG.95YuksporiteK4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3Mon. 2/m : P21/m
9.DG.97Eveslogite(Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14Mon. 2/m : P2/m

Other InformationHide

Notes:
When the mineral is ignited to expel water it becomes a pale blue. Heated with the blowpipe it becomes incandescent and converted into a vitrified mass which is infusible. Easily soluble in HCl with abundant gelatinization.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Foshagite in petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

Internet Links for FoshagiteHide

References for FoshagiteHide

Reference List:
Eakle, Arthur S. (1925) Foshagite, a new silicate from Crestmore, California. American Mineralogist, 10 (4) 97-99
Vigfusson, V.A. (1931) The hydrated calcium silicates. American Journal of Science: 21: 67-78.
Flint, E.P., McMurdie, H.F., Wells, L.S. (1938) Formation of hydrated calcium silicates at elevated temperatures and pressures. Journal of Research of the National Bureau of Standards: 21(1): 617-638.
McMurdie, H.F., Flint, E.P. (1943) X-ray patterns of hydrated calcium silicates. ournal of Research of the National Bureau of Standards: 31: 225-228.
Hweller, L., Taylor, H.F.W. (1956) Crystallographic data for the calcium silicates. London, H.M.S.O.: 79 pgs (53).
Newman, E.S. (1956) Heats of formation of xonotlite, hillebrandite, and foshagite. Materials Science Journal of research of the National Bureau of Standards.
Mamedov, Kh.S., Belov, N.V. (1958) The crystal structure of foshagite. Doklady Akad. Nauk SSSR: 121: 901.
Gard, J.A., Taylor, H.F.W. (1958) Foshagite: composition, unit cell and dehydration. American Mineralogist: 43: 1-15.
Gard, J.A., Taylor, H.F.W. (1960) The crystal structure of foshagite. Acta Crystallographica: 13: 785-793.
Kusachi, I., Numano, T., Henmi, K. (1971) Contact minerals from Kushiro, Hiroshima Prefecture; 3, Foshagite, Hillebrandite and Scawtite. Journal of the Mineralogical Society of Japan: 10: 296-304.
Bailey, S. W. (1977) Report of the I.M.A.-I. U.Cr. Joint Committee on Nomenclature. American Mineralogist, 62 (5-6) 411-415
Buick, I.S., Gibson, R., Wallmach, T., Metz, J. (2000) The occurrence of cuspidine, foshagite and hillebrandite in calc-silicate xenoliths from the Bushveld Complex, South Africa. South African Journal of Geology: 103(3-4): 249-254.
Zadov, A.E., Pertsev, N.N., Belakovsky, D.I., Chukanov, N.V., Kuznetsova, O.Y. (2004) Foshagite and hillebrandite from skarn xenoliths of Ioko-Dovyrensky massif. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 133(1): 73-83.
Meller, N., Kyritsis, K., Hall, C. (2009) The mineralogy of the CaO-Al2O3-SiO2-H2O (CASH) hydroceramic system from 200 to 350°C. Cement and Concrete Research: 39: 45-53.
(2023) Foshagite. Handbook of Mineralogy. Mineralogical Society of America

Localities for FoshagiteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia
 
  • Tasmania
    • Huon Valley municipality
      • Huon-Channel region
        • Weld River district
Analyses in prep
  • Victoria
    • Rural City of Benalla
Henry (1999)
Iraq
 
  • Sulaymaniyah Governorate
    • Pshdar District
      • Qaladiza
        • Hero
Al-Hermezi et al. (1986)
Israel
 
  • Southern District (HaDarom District)
    • Tamar Regional Council
Galuskin et al. (2015)
Italy
 
  • Veneto
    • Vicenza Province
      • Laghi
Zordan et al. (2008)
Japan
 
  • Hiroshima Prefecture
    • Shoubara City
3 +1 other reference
  • Iwate Prefecture
    • Kamaishi City
Dr. Matsuo Nambu collection (curated at Geological Survey of Japan)
    • Oshu City
      • Esashi ward
Bunno et al. (1982)
  • Okayama Prefecture
    • Takahashi City
      • Bitchū
        • Fuka
Henmi et al. (1978) +1 other reference
Jordan
 
  • Amman Governorate
    • Transjordan Plateau
      • Daba-Siwaqa complex
Galuskina et al. (2019)
Middle East
 
Gross (1977)
New Zealand
 
  • Northland Region
    • Kaipara District
      • Tokatoka
Baker et al. (1980)
Palestine
 
  • West Bank
    • Quds Governorate
Galuskin et al. (2015)
Romania
 
  • Hunedoara County
Pascal et al. (2001)
Russia
 
  • Buryatia
    • Severo-Baykalsky District
      • Dovyren Highlands
Galuskin (2007)
Kislov +1 other reference
Kislov +1 other reference
  • Sverdlovsk Oblast
    • Polevskoy
American Mineralogist +1 other reference
South Africa
 
Buick
  • Northern Cape
    • John Taolo Gaetsewe District Municipality
      • Joe Morolong Local Municipality
Von Bezing (1991)
Turkey
 
  • Rize Province
Armbruster et al. (2012) +1 other reference
UK
 
  • Scotland
    • Highland
      • Fort William and Ardnamurchan
        • Ardnamurchan
Agrell (1965) +1 other reference
USA (TL)
 
  • California
    • Riverside County
      • Jurupa Valley
        • Crestmore
Eakle (1925)
            • Sky Blue Hill
Van Nostrand Reinholt Press: 407. +5 other references
  • Utah
    • Salt Lake County
      • Bingham Mining District
James R. Wilson (1995)
Quick NavTopAbout FoshagiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesCommon AssociatesStrunz-MindatOther InformationFoshagite in petrologyInternet Links References Localities Locality List
 
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