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Whelanite

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Formula:
Cu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2O
Colour:
Pale blue, greenish blue
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.74
Crystal System:
Orthorhombic
Name:
Honors James A. Whelan (1928–2003), who was a professor of mineralogy at the University of Utah, where he taught from 1958 to 1992.
This page provides mineralogical data about Whelanite.


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Classification of WhelaniteHide

Approved
Approval Year:
1977
8/D.07-20

8 : Silicates
D : Unclassified silicates, mostly cations of small size Mg, Fe, Mn, Cu
07 : Ajoite series

Physical Properties of WhelaniteHide

Vitreous
Transparency:
Transparent
Colour:
Pale blue, greenish blue
Streak:
Pale blue
Hardness:
2½ on Mohs scale
Tenacity:
Flexible
Cleavage:
Perfect
perfect on {001} and good on {010}
Fracture:
Splintery
Density:
2.74 g/cm3 (Measured)    2.738 g/cm3 (Calculated)

Optical Data of WhelaniteHide

Type:
Biaxial (-)
RI values:
nα = 1.612(2) nβ = 1.622 nγ = 1.626
2V:
Measured: 64°
Max Birefringence:
δ = 0.014
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Weak
Comments:
X = Y (pale blue) < Z (light blue)
Comments:
The β RI was calculated from 2V (thinness of crystals).

Chemical Properties of WhelaniteHide

Formula:
Cu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2O
IMA Formula:
Cu2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2O

Crystallography of WhelaniteHide

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pnn2
Cell Parameters:
a = 5.6551 Å, b = 3.683 Å, c = 27.1372 Å
Ratio:
a:b:c = 1.535 : 1 : 7.368
Unit Cell V:
565.3 ų
Z:
1
Morphology:
Irregular clusters and radial aggregates of platy to lath-like crystals up to 1 mm in length, flattened on {001} and elongated on [100]
Comment:
Pn2n

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.79(004) 52
3.072(111) 43
3.013(112) 100
2.921(113) 39
2.802(114) 45
2.522(116 205) 44
1.839(020 1.1.12) 37

Type Occurrence of WhelaniteHide

General Appearance of Type Material:
Irregular clusters and radial aggregates of platy to lath-like crystals up to 1 mm in length.
Place of Conservation of Type Material:
Smithsonian Institution (U.S. National Museum of Natural History) and the Los Angeles County Museum of Natural History (now known as the Natural History Museum of Los Angeles County)
Geological Setting of Type Material:
Found in a copper-rich, diopside–garnet–magnetite skarn
Associated Minerals at Type Locality:

Synonyms of WhelaniteHide

Other Language Names for WhelaniteHide

German:Whelanit
Spanish:Whelanita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Stringhamite9 photos of Whelanite associated with Stringhamite on mindat.org.
Tobermorite4 photos of Whelanite associated with Tobermorite on mindat.org.
Xonotlite3 photos of Whelanite associated with Xonotlite on mindat.org.
Kinoite3 photos of Whelanite associated with Kinoite on mindat.org.
Thaumasite2 photos of Whelanite associated with Thaumasite on mindat.org.

Related Minerals - Nickel-Strunz Grouping (8th Edition)Hide

8/D.07-10Ajoite(K,Na)Cu7AlSi9O24(OH)6 · 3H2OTric.

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 WhelaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Murdoch, J. (1961): Crestmore, past and present. American Mineralogist 46, 245-257. [as Mineral Y; cf. http://www.mindat.org/mesg-6-55440.html]
Hindman, J.R. (1985): PhD dissertation University of Utah
Elements October 2007, p. 360 [mention of approval]
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.

Internet Links for WhelaniteHide

Localities for WhelaniteHide

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.
USA
 
  • Arizona
    • Gila Co.
      • Dripping Spring Mts
        • Banner District
          • Christmas area
            • Christmas
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 419.; 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.
  • 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
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.
  • 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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