1 - Austinite and Limonite

ID	1
Mineral	Austinite Limonite
Location	Ojuela Mine - Mapimi - Durango - Mexico
Fluorescence	LW-UV: close SW-UV: close
Mindat.org	View Austinite information at mindat.org View Limonite information at mindat.org

ID	432
Long ID	1:1:432:1
Formula	`CaZn(AsO₄)(OH)`
IMA Status	APPROVED GRANDFATHERED
Description	Adelite-Descloizite Group. Austinite-Conichalcite Series. The zinc analogue of Cobaltaustinite and Nickelaustinite.
General Appearance	Distinct, well developed, orthorhombic crystals of bladed or acicular habit.
Occurrence	Oxidized zone of metal deposit.
Other Occurrences	A rare mineral in the oxidation zone of arsenic bearing base metal deposits.
Discovery Year	1935
Diapheny	Transparent,Translucent
Cleavage	Good on {011}.
Tenacity	brittle
Colour	Colorless to pale yellowish white or bright green; colourless in transmitted light.
Hardness (min)	4.0
Hardness (max)	4.5
Luminescence	None
Lustre	Subadamantine, Silky in fibrous aggregates.
About the name	Named by Lloyd Williams Staples in 1935 in honor of Austin Flint Rogers (16 August 1877, Lathrop, Missouri, USA - 10 March 1957, Berkeley, California, USA), American mineralogist at Stanford University.
Streak	White
Crystal System	Orthorhombic
Cleavage Type	Distinct/Good
Morphology	Enantiomorphous bladed crystals elongated [100], radial fibrous crusts and nodules.
Twinning	Left and right hand individuals joined on (100) with (010) and (001) coincident.
UV	Not fluorescent.
Comment Luster	Silky in aggregates.
Publication Year	1935
key_elements	As Zn
shortcode_ima	Aus

ID	2402
Long ID	1:1:2402:6
Entry type	3
Diapheny	Opaque
About the name	Named in 1813 by Johann Friedrich Ludwig Hausmann from the Greek λειμών for meadow alluding to its common occurrences in bogs.

Austinite and Limonite