Article

Cryolite: Properties and Occurrences

Cryolite: Properties and Occurrences

Cryolite (Na3AlF6, sodium hexafluoroaluminate) is an uncommon mineral identified with the once large deposit at Ivigtût on the west coast of Greenland, depleted by 1987. It is usually lightly colored and is commonly associated with contrasting dark brownish yellow Siderite. Now it is too rare to.....

Read More »

Crossite: Properties and Occurrences

Crossite: Properties and Occurrences

Crossite is an inosilicate double chain sodic amphibole and is a rare silicate mineral belonging to the riebeckite group. It is an amphibole intermediate in composition between glaucophane and riebeckite. It is considered an intermediate between the amphiboles glaucophane and magnesioriebeckite, .....

Read More »

Parabola in Coordinate Geometry

Parabola in Coordinate Geometry

Parabola in Coordinate Geometry Co-ordinates Geometry is a system of geometry where the position of points on the plane is described using an ordered pair of numbers. Straight lines in coordinate geometry are the same idea as in regular geometry, except that they are drawn on a coordinate plane a.....

Read More »

Crookesite: Properties and Occurrences

Crookesite:  Properties and Occurrences

Crookesite is a selenide mineral composed of copper and selenium with variable thallium and silver. It is a rare mineral, selenide of copper, thallium, and silver, occurring in steel-gray, compact masses. It was discovered in 1866 in Skrikerum, Sweden and named for Sir William Crookes (1832–191.....

Read More »

Cronstedtite

Cronstedtite

Cronstedtite is a complex iron silicate mineral belonging to the serpentine group of minerals. It has a formula of Fe2+2Fe3+(Si, Fe3+O5)(OH)4. It is a trigonal-ditrigonal pyramidal mineral containing hydrogen, iron, oxygen, and silicon. It was discovered in 1821 and named in honor of Swedish mine.....

Read More »

Crocoite: Properties and Occurrences

Crocoite: Properties and Occurrences

Crocoite is a mineral consisting of lead chromate, PbCrO4, and crystallizing in the monoclinic crystal system. It is a rare bright orange mineral consisting of lead chromate. It is identical in composition with the artificial product chrome yellow used as a paint pigment. Its main source of quali.....

Read More »

Cristobalite: Properties and Occurrences

Cristobalite: Properties and Occurrences

The mineral cristobalite is a high-temperature polymorph of silica, meaning that it has the same chemical formula as quartz, SiO2, but a distinct crystal structure. It is common in volcanic rocks and many microscopic crystals are easily seen in a petrographic microscope. Cristobalite occurs as wh.....

Read More »

Types of Interviews on the Basis of Methods

Types of Interviews on the Basis of Methods

An interview is a face-to-face interaction between interviewer and interviewee. If conducted carefully and properly, it observes and appraises the suitability of the candidate to perform the job successfully. An interview is based on the in-depth conversation which probes the areas of information.....

Read More »

Creedite: Properties and Occurrences

Creedite: Properties and Occurrences

Creedite is a calcium aluminum sulfate fluoro hydroxide mineral with formula: Ca3Al2SO4(F, OH)10·2(H2O). It is a monoclinic-prismatic mineral containing aluminum, calcium, fluorine, hydrogen, oxygen, and sulfur. Creedite’s purple color is attractive and its crystal form is unique, making c.....

Read More »

Coyoteite: Properties and Occurrences

Coyoteite: Properties and Occurrences

Coyoteite is a hydrated sodium iron sulfide mineral. It is a triclinic black mineral containing hydrogen, iron, oxygen, sodium, and sulfur. It is moderately magnetic. The mineral was named coyoteite after Coyote Peak near Orick, California where it was discovered (along with another rare mineral,.....

Read More »

Covellite: Properties and Occurrences

Covellite: Properties and Occurrences

Covellite (also known as covelline) is a rare copper sulfide mineral with the formula CuS. It is a blue mineral consisting of copper sulphide, typically occurring as a coating on other copper minerals. It is a native sulphide of copper, occurring in masses of a dark blue color; — hence call.....

Read More »

Types of Interview on the Basis of Objectives

Types of Interview on the Basis of Objectives

An interview is a face-to-face interaction between interviewer and interviewee. If conducted carefully and properly, it observes and appraises the suitability of the candidate to perform the job successfully. An interview is based on the in-depth conversation which probes the areas of informatio.....

Read More »