1. mineral
Calcite brittani wang 1

2. mineral
Calcite is a magic mineral, is has an optical property called birefringence, which means double refraction.
birefringen ce 2

3. mineral
It could be colorless, white, grey, yellow, green, red, brown or even black for its impurities. It also could fluoresced red, blue, yellow and other colors under either SW and LW UV.
colorful 3

4. 4

5. Mineral properties mineral Category: Carbonate mineral
Luster: vitreous to pearly
Formula: CaCO3
Steak: white.
Crystal habit: crystalline, granular, stalactites, concretionary, massive,
Diaphaneity: Transparent to translucent
Cleavage: Perfect on three directions
Specific gravity: 2.71
Fracture: Conchoidal
Optical properties: Uniaxial
Tenacity: brittle
Solubility: Soluble in dilute acids
Mohs scale hardness:3
Crystal system: Trigonal hexagonal scalenohedral 5

6. mineral
Crystal system 6

7. mineral
Formation processes
Calcite forms a precursor( amorphous calcium carbonate)
Two ways:
ACC nanoparticles rapidly dehydrate and crystallize to form individuals particles of vaterite
The vaterite transforms to calcite via a dissolution and reprecipitation mechanism with the reaction rate controlled by the surface area of calcite. 7

8. mineral
We need to know
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate(CaCO3).
Calcite has a defining Mohs hardness of 3. 8

9. We need to know
mineral
Calcite’s luster is vitreous and pearly on cleavage surfaces.
Cleavage is always in three directions parallel to the rhombohedron form
Calcite’s fracture is conchoidal but its rare exist naturally. 9

10. We need to know Calcite don’t have magnetism and no effervescence.
mineral
Calcite don’t have magnetism and no effervescence.
The streak of calcite is white
Calcite is transparent(Iceland spar) to opaque and may show phosphorescence 10

11. mineral
We need to know
Calcite is a carbonate mineral, it can dissolve with most forms of acid. Temperature, PH and ion concentrations in the water can effect its rate of dissolve.
Calcite also has a unusual characteristic, retrograde solubility which can gather rocks together to fill the fractures. 11

12. Common uses of the mineral12

13. mineral
High- grade optical
It was used in World War 2 for gun sights, specifically in bomb sights and anti-aircraft weaponry 13

14. mineral
Microbiologically precipitated calcite has a wide range of applications, such as soil remediation, soil stabilization and concrete repair 14

15. mineral
Natural occurrence 15

16. mineral
limesto ne
Calcite is a common constituent of sedimentary rocks. It’s formed from the shells of dead marine organisms. 16

17. mineral
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