Mottramite and Calcite

ID	464
Mineral	Mottramite Calcite
Location	Ojuela Mine - Mapimi - Durango - Mexico
Fluorescence	LW-UV: check SW-UV: check
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Mindat data

ID	2792
Long ID	1:1:2792:8
Formula	`PbCu(VO₄)(OH)`
IMA Status	0 1
Other Occurrences	Oxidation zone of vanadium bearing base metal deposits.
Discovery Year	1876
Diapheny	Transparent,Opaque
Tenacity	brittle
Colour	Grass-green, olive-green, yellow-green, siskin-green, blackish brown, nearly black
Hardness (min)	3.0
Hardness (max)	3.5
About the name	For the locality at Mottram St. Andrew, Cheshire, England where ore was stockpiled. Most likely mined from Pim Hill Mine, Shrewsbury, Shropshire.
Streak	Yellowish green
Crystal System	Orthorhombic
Cleavage Type	None Observed
Fracture type	Irregular/Uneven,Sub-Conchoidal
Morphology	Crystals equant, dipyramidal {111}, prismatic [001]. Drusy crusts of intergrown crystals common; mammillary or botryoidal surfaces.
key_elements	0 1 2
shortcode_ima	Mott
Group	Adelite-Descloizite Group

ID	859
Long ID	1:1:859:4
Formula	`Ca(CO₃)`
IMA Status	0 1
Other Occurrences	Found in most geologic settings and as a later forming replacement mineral in most other environments in one form or another, it is most common as massive material in limestones and marbles. It forms as chemical sedimentary deposits as limestone, can be regionally or contact metamorphosed into marbles and rarely forms igneous rocks (carbonatites). Also is a common gangue mineral in hydrothermal deposits.
Industrial	Mined extensively for a wide variety of uses ranging from lime (cement) to limestone and marble building stones and aggregates, agricultural supplements and optical calcite.
Diapheny	Transparent,Translucent
Cleavage	Perfect on {10_11}.
Tenacity	brittle
Colour	White, Yellow, Red, Orange, Blue, Green, Brown, Gray etc.
Hardness (min)	3.0
Hardness (max)	3.0
Luminescence	Fluorescent
Lustre	Vitreous
About the name	Ancient name. Named as a mineral by Gaius Plinius Secundus (Pliny the elder) in 79 from Calx, Latin for Lime.
Streak	White
Crystal System	Trigonal
Cleavage Type	Perfect
Fracture type	Conchoidal
Morphology	Over 800 different forms have been described. Most commonly as acute rhombohedrons or prismatic with scalenohedral terminations, or combinations of the two.
Twinning	At least four twin laws have been described, the most common being when the twin plane and the composition plane are {01_12}. Also common with twinning on {0001} with {0001} as the compositional surface, producing re-entrant angles. Uncommon with {10_11} or {02_21} as twin planes, producing somewhat heart-shaped crystals ("butterfly" twins).
UV	May be fluorescent under LW UV, mid-range UV or SW UV as well as under X-rays, cathode rays and even sunlight, in a number of colors and shades, commonly an intense red under SW with Mn as an activator (such as at Franklin, New Jersey, USA, and Långban in Sweden.
Comment Luster	Pearly on cleavage and {0001}. Can be dull or earthy in chalk variety.
shortcode_ima	Cal
Group	Calcite Group

Price: € 15

Dimensions: Not registered

Weight: Not registered

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Notes:

Symbol	Element
C	Carbon
Ca	Calcium
Cu	Copper
H	Hydrogen
O	Oxygen
Pb	Lead
V	Vanadium

Mottramite and Calcite

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