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Cornuite (of Rogers)

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Felix Cornu
Formula:
Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Colour:
Green, bluish green
Lustre:
Sub-Vitreous, Resinous, Waxy
Name:
Named in 1917 by Austin F. Rogers in honor of Felix Cornu [December 26, 1882 Prague, Czech Republic - September 23, 1909 Leoben, Austria] assistant professor of mineralogy, petrography and geology of mineral deposits at Montanische Hochschule University, Leoben, Austria. Cornu is recognized as a founder of colloid chemistry and the mineral name was chosen in appreciation of his being one of the first mineralogists to make a clear distinction between crystalline and amorphous mineral species. Cornuite is an amorphous equivalent of chrysocolla. Cornu named the mineral species hibschite. Cornu's research on the hydration state of zeolites from the České středohoří Mountains resulted in the Reuss–Cornu Rule which correlates the hydration states of zeolites with descreasing temperature of crystallization.
A variety of Chrysocolla

Described as "Amorphous equivalent of chrysocolla."


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Physical Properties of Cornuite (of Rogers)Hide

Sub-Vitreous, Resinous, Waxy
Transparency:
Transparent, Translucent
Colour:
Green, bluish green

Optical Data of Cornuite (of Rogers)Hide

Type:
Isotropic
RI values:
n = 1.529 - 1.545
Birefringence:
0.00
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:
Low
Type:
Isotropic

Chemical Properties of Cornuite (of Rogers)Hide

Formula:
Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O

Fluorescence of Cornuite (of Rogers)Hide

Not fluorescent in UV

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 Cornuite (of Rogers)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Rogers, Austin F. (1917): A review of the Amorphous minerals. Journal of Geology 25, 515-541.

Internet Links for Cornuite (of Rogers)Hide

Mineral and/or Locality  
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