Götzenite (original) (raw)

Colour:

Very pale yellow, tan, off-white, colorless, white.

Comment:

Colorless in thin section (TL)

Cleavage:

Perfect
Perfect on {100}, good on {001}

Density:

3.03 - 3.14 g/cm3 (Measured) 2.84 g/cm3 (Calculated)

Class (H-M):

1 - Pinacoidal

Cell Parameters:

a = 9.667 Å, b = 5.731 Å, c = 7.334 Å
α = 90°, β = 101.05°, γ = 101.31°

Ratio:

a:b:c = 1.687 : 1 : 1.28

Unit Cell V:

390.74 ų (Calculated from Unit Cell)

Morphology:

Prismatic, acicular, skeletal.

Twinning:

Lamellar twinning on {001}
ubiquitous

General Appearance of Type Material:

As prismatic crystals up to 0.5 mm long.

Place of Conservation of Type Material:

Musée royal de l’Afrique central, Tervuren, Belgium, number RGM 8.037 (cotype).
Natural History Museum, London, United Kingdom, number 1,957,702 (cotype).
National Museum of Natural History, Washington, D.C., USA, number 142.981 (holotype).

Geological Setting of Type Material:

Associated Minerals at Type Locality:

- 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.