Chalcopyrite and Baryte

ID	252
Mineral	Chalcopyrite Baryte
Location	Dreislar - Nordrhein-Westfalen - Germany
Fluorescence	LW-UV: close SW-UV: close
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Mindat data

ID	955
Long ID	1:1:955:7
Formula	`CuFeS₂`
IMA Status	0 1
Other Occurrences	It is the most abundant copper-bearing mineral and is widespread. It is a primary mineral in hydrothermal veins, disseminations, and massive replacements; the principal copper mineral of porphyry copper deposits.
Industrial	It is the principal ore of copper.
Discovery Year	1725
Diapheny	Opaque
Cleavage	Indistinct on {011}, sometimes distinct.
Tenacity	brittle
Colour	Brass yellow, often with an iridescent tarnish.
Hardness (min)	3.5
Hardness (max)	4.0
Luminescence	None
Lustre	Metallic
About the name	Named in 1725 by Johann Friedrich Henckel from the Greek "chalkos", copper, and "pyrites", strike fire.
Streak	Greenish black
Crystal System	Tetragonal
Cleavage Type	Poor/Indistinct
Fracture type	Irregular/Uneven
Morphology	Typically found as equant to wedge-shaped pseudo-tetrahedral dispenoidal crystals, often modified by tetragonal scalenohedral faces. Mostly found massive or in disseminated grains and major deposits of such material are known.
Twinning	Twinned on {112} and {012}, penetration or cyclic.
key_elements	0
shortcode_ima	Ccp
Group	Chalcopyrite Group

ID	549
Long ID	1:1:549:0
Formula	`Ba(SO₄)`
IMA Status	0 1
Other Occurrences	Commonly found as a gangue mineral in metallic ore deposits of epithermal or mesothermal origin; but it may also be found as lenses or replacement deposits in sedimentary rocks, both of hypogene and supergene origin.
Industrial	Used as an additive in drilling fluids, as a white pigment, e. g. in cosmetic products and in paints, and as a filling material for polymers and papers, high contrast medium for medical X-rays. Also the main source of barium.
Diapheny	Transparent,Translucent,Opaque
Cleavage	Perfect on {001}; less so on {210}; Imperfect on {010}.
Tenacity	brittle
Colour	Colourless, white, yellow, brown, grey, blue, etc.; colourless in transmitted light (also tinted yellow, brown, green, blue, etc.)
Hardness (min)	3.0
Hardness (max)	3.0
Luminescence	Fluoresces yellows, orange, or pink in LW; phophsphoresces strongly greenish-white.
Lustre	Vitreous to Resinous, Pearly on cleavage surfaces.
About the name	Named in 1800 by Dietrich Ludwig Gustav Karsten from the Greek βαρύς, heavy, due to its unusual heaviness for a non-metallic mineral.
Streak	white
Crystal System	Orthorhombic
Cleavage Type	Perfect
Fracture type	Irregular/Uneven
Morphology	Usually thin to thick tabular {001}, bounded by {210} alone or in combination with {101}, {011} or other forms. Also flattened {001}, and elongated to prismatic [010] or [100]. More rarely prismatic [001], or equant. Often as aggregates or clusters of tabular crystals with edges projecting into crest-like forms, or as rosettes. Also found as massive material, compact, laminated or concretionary; and in fibrous, stalactic, and earthy masses.
UV	Shades of yellow, occasionally orange or pink (LW UV). Shades of yellow, white (Franklin & Sterling Hill, NJ). May phosphoresce strongly greenish-white.
Thermal Behaviour	Inverts to another (monoclinic?) polymorph when heated to 1149°C. Above 1400°C decomposition to barium oxide, sulphur dioxide and oxygen. Thermoluminescent at times.
Comment Luster	Vitreous to Resinous, Pearly on cleavage surfaces.
key_elements	0
shortcode_ima	Brt
Group	Baryte Group

Price: € 15

Dimensions: Not registered

Weight: 1471 g

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Notes:

Symbol	Element
Ba	Barium
Cu	Copper
Fe	Iron
O	Oxygen
S	Sulfur

Chalcopyrite and Baryte

Mindat data

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