Goethite

Goethite pseudomorph after gypsum

Origin: Santa Eulalia, Chihuahua, Mexico

Ex. Gary Hansen collection

Sample size: 8.5 x 6.5 x 4.2 cm

Origin: Qinglong, Guizhou Province, China

Sample size: 10.5 x 9.8 x 5.5 cm

Origin: Nandan, Guangxi Province, China

Sample size: 17.3 x 12.7 x 9.1 cm (top/2nd row), 5.2 x 4.2 x 2.6 cm (3rd row), 13.3 x 2.9 x 2.8 cm (4th/bottom row)

Photo courtesy of:

Rob Lavinsky

SEM images

TEM images

vibrational spectra description

IR spectra

Raman spectra

N-IR spectra

F-IR spectra

IES spectra