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Stringhamite

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Formula:
CaCu(SiO4) · H2O
Colour:
Azure blue
Lustre:
Vitreous
Specific Gravity:
3.16 - 3.18
Crystal System:
Monoclinic
Name:
For Bronson Ferrin Stringham (1907-1968) chair of department of mineralogy, University of Utah.
This page provides mineralogical data about Stringhamite.


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Classification of StringhamiteHide

Approved
Approval Year:
1974
9.AE.35

9 : SILICATES (Germanates)
A : Nesosilicates
E : Nesosilicates with additional anions (O,OH,F,H2O); cations in tetrahedral [4] coordination
78.1.9.1

78 : Unclassified Silicates
1 : Miscellaneous
14.2.10

14 : Silicates not Containing Aluminum
2 : Silicates of Cu

Physical Properties of StringhamiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Azure blue
Density:
3.16 - 3.18 g/cm3 (Measured)    3.67 g/cm3 (Calculated)

Optical Data of StringhamiteHide

Type:
Biaxial (+)
RI values:
nα = 1.709 nβ = 1.717 nγ = 1.729
2V:
Measured: 80° , Calculated: 80°
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v weak
Pleochroism:
Visible
Comments:
alpha - light grey blue
beta - light blue
gamma - dark blue

Chemical Properties of StringhamiteHide

Formula:
CaCu(SiO4) · H2O
IMA Formula:
CaCuSiO4 · H2O
Common Impurities:
Al,Fe,Mg

Crystallography of StringhamiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 5.02 Å, b = 16.07 Å, c = 5.3 Å
β = 102.58°
Ratio:
a:b:c = 0.312 : 1 : 0.33
Unit Cell V:
417.29 ų (Calculated from Unit Cell)
Twinning:
All crystals are multiplied twinned

Crystallographic forms of StringhamiteHide

Crystal Atlas:
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Stringhamite - {101}, {011}, modified
3d models and HTML5 code kindly provided by www.smorf.nl.

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Type Occurrence of StringhamiteHide

Geological Setting of Type Material:
In fractures near a contact between quartz monzonite and limestone

Synonyms of StringhamiteHide

Other Language Names for StringhamiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Xonotlite13 photos of Stringhamite associated with Xonotlite on mindat.org.
Tobermorite12 photos of Stringhamite associated with Tobermorite on mindat.org.
Whelanite9 photos of Stringhamite associated with Whelanite on mindat.org.
Kinoite4 photos of Stringhamite associated with Kinoite on mindat.org.
Andradite3 photos of Stringhamite associated with Andradite on mindat.org.
Grossular2 photos of Stringhamite associated with Grossular on mindat.org.
Hematite1 photo of Stringhamite associated with Hematite on mindat.org.
Scawtite1 photo of Stringhamite associated with Scawtite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AE.05BerylliteBe3(SiO4)(OH)2 · H2OOrth.
9.AE.10EuclaseBeAl(SiO4)(OH)Mon. 2/m : P21/b
9.AE.15SverigeiteNaMnMgSnBe2(SiO4)3(OH)Orth. mmm (2/m 2/m 2/m) : Imma
9.AE.20HodgkinsoniteMn2+Zn2(SiO4)(OH)2Mon.
9.AE.25GerstmanniteMnMgZn(SiO4)(OH)2Orth.
9.AE.30ClinohedriteCaZn(SiO4) · H2OMon. m : Bb
9.AE.40Katoptrite(Mn2+,Mg)13(Al,Fe3+)4Sb5+2(SiO4)2O20Mon. 2/m : B2/m
9.AE.45YeatmaniteZn6Mn2+9Sb5+2(SiO4)4O12Tric.
9.AE.50SphaerobertranditeBe3(SiO4)(OH)2Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.2.1DioptaseCuSiO3 · H2OTrig. 3 : R3
14.2.2ShattuckiteCu5(Si2O6)2(OH)2Orth. mmm (2/m 2/m 2/m)
14.2.3PlancheiteCu8(Si8O22)(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
14.2.4GilaliteCu5Si6O17 · 7H2OMon.
14.2.5ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2OOrth.
14.2.6LitidioniteCuNaKSi4O10Tric.
14.2.7ReinhardbraunsiteCa5(SiO4)2(OH,F)2Mon. 2/m : P21/b
14.2.8CuprorivaiteCaCuSi4O10Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
14.2.9KinoiteCa2Cu2(H2O)2[Si3O10]Mon. 2/m : P21/m
14.2.11ApachiteCu9Si10O29 · 11H2OMon.

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 StringhamiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hindman, J. R. (1976): Stringhamite, a new calcium copper siliate from Utah. American Mineralogist (1976): 61: 189-192.
American Mineralogist (1986): 71: 231.
Tschermaks Mineralogische und Petrographische Mitteilungen (1985): 34: 15-24.

Internet Links for StringhamiteHide

Localities for StringhamiteHide

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.
Chile
 
  • Atacama Region
    • Copiapó Province
Am.Min. 61:189
        • Punta del Cobre District
Bob Jenkins & M. Dini collections
Japan
 
  • Honshu Island
    • Chugoku Region
      • Okayama Prefecture
        • Takahashi City
          • Bicchu-cho (Bitchu-cho)
            • Fuka
Nishimura et al (2001) Koubutsu-Gakkai Kou'en-Youshi, 114.
USA
 
  • Arizona
    • Gila Co.
      • Dripping Spring Mts
        • Banner District
          • Christmas area
            • Christmas
Handbook of Mineralolgy Vol. II Silica, Silicates, Part 2 pg.760. Anthony, Bideaux, Bladh, Nichols.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 384-385.
    • Pima Co.
      • Sierrita Mts
        • Pima District (Olive District; Mineral Hill District; Twin Buttes District)
          • Twin Buttes
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 268, 385.
  • California
    • Inyo Co.
      • Lee District
        • Nelson Range
Kampf, A. R., Mills, S. J., Merlino, S., Pasero, M., McDonald, A. M., Wray, W. B., & Hindman, J. R. (2012). Whelanite, Cu2Ca6 [Si6O17 (OH)](CO3)(OH) 3 (H2O) 2, an (old) new mineral from the Bawana mine, Milford, Utah. American Mineralogist, 97(11-12), 2007-2015.
    • Riverside Co.
      • Crestmore
Hindman, J.R. (1976) Stringhamite, a new hydrous calcium silicate from Utah. American Mineralogist: 61: 189-192; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 515.
  • Utah
    • Beaver Co.
      • Rocky Range
        • Rocky District
Kampf, A. R., Mills, S. J., Merlino, S., Pasero, M., McDonald, A. M., Wray, W. B., & Hindman, J. R. (2012). Whelanite, Cu2Ca6 [Si6O17 (OH)](CO3)(OH) 3 (H2O) 2, an (old) new mineral from the Bawana mine, Milford, Utah. American Mineralogist, 97(11-12), 2007-2015.
Mineral and/or Locality  
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