Describe the silica tetrahedron. The structure of the mineral olivine is described as isolated tetrahedral. What does this mean? Why is color an unreliable property for identifying minerals? What’s the main difference between metallic and nonmetallic luster in minerals? How are cleavage and fracture of minerals different?

Answers

Answer 1

Answer:

This fundamental structural unit consists of a silicon cation (black in photo) surrounded by four oxygen anions (red in photo), giving it four negative charges. It is found in all silicate minerals (ie. amphibole, olivine, pyroxene, quartz, feldspar, etc.). The silica tetrahedra may be arranged in chains (ex: pyroxenes), double chains (ex. amphiboles), sheets (ex: micas), and frameworks (ex: quartz, feldspars), forming the basic structure of the planet.

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Answer 2

Answer:

The silica tetrahedron is a molecule containing four oxygen atoms and one silicon atom. It resembles a triangular pyramid, with the silicon atom located in the middle and one oxygen atom located at each of the four corners.

Explanation:

The structure of olivine is described as isolated tetrahedral because each tetrahedron is bonded to either a magnesium ion or an iron ion. Although some minerals always appear the same color, many vary in color due to trace elements within the mineral. These trace elements can alter the mineral’s coloring.

Differences between metallic and nonmetallic luster in minerals:-

Metallic minerals are originated from the igneous types of rocks. Non-metallic minerals are originated from the sedimentary rocks. Appearance & touch: Metallic minerals are hard have a shiny appearance of their own. Non-metallic minerals are not as hard as the metallic minerals and have no shine or luster of their own.

Differences between cleavage and fracture of minerals:

The words cleavage and fracture are very common words that we use in many contexts. However, it is while identifying minerals that these words are used together as these are physical attributes of minerals and help in mineral identification as different minerals have different types of fractures and cleavages.

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Related Questions

parts of the middle east have a mediterranean climate. this means they have hot, dry summers and warm, ____ winters what word completes the sentence

Answers

Answer:

Wet

Explanation:

parts of the middle east have a mediterranean climate. this means they have hot, dry summers and warm, _wet_winters

Parts of the middle east have a Mediterranean climate. this means they have hot, dry summers and warm, wet winters.

The Mediterranean climate zone typically occurs along western coasts of landmasses between roughly 30 and 45 degrees north or south of the equator.

A Mediterranean climate is characterized by a dry summer climate due to the subtropical ridge, which extends towards the pole of that hemisphere in summer and migrates towards the equator in winter. The seasonal poleward-equatorward variations in temperature are responsible for this.

During the summer, the subtropical ridge extends towards the pole of the hemisphere in question, and in the winter, it migrates towards the equator. Thus, they have hot, dry summers and warm, wet winters.

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Geography had a major influence on the rise of city-states in ancient Greece. The terrain isolated communities and provided protection from invasions. The city-states established through the Mediterranean and Black Seas. They also established along these routes.

Answers

Answer:

desert, trade routs, colonies

Explanation:

The region's farmers grew crops and animals that were impacted by the region's steep mountains.

What are mountains?

A mountain is an elevated area of the crust of the Earth, typically with steep sides that reveal a substantial amount of bedrock that has been exposed.

Although definitions fluctuate, a mountain is often taller than a hill and differs from a plateau in that it has a smaller top area. Most mountains are found in mountain ranges, while a handful have isolated summits.

Tectonic forces, erosion, and volcanism, which operate on time spans as long as tens of millions of years, are responsible for the formation of mountains.

Mountain ranges are gradually flattened when mountain-building stops due to weathering, slumping, and other types of mass wasting, as well as erosion by rivers and glaciers.

Climates on mountains with high heights are typically colder than those at equivalent latitudes at sea level.

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in gideon v. wainwright (1963) the supreme court ruled that gideon had been denied his rights because he had

Answers

Answer:

He had been denied his right of counsel in the trial.

Explanation:

Under the law in Florida, an attorney was appointed to you only if you were conisdered poor.

Answer:

Counsel in trial

Explanation:

In Gideon v. Wainwright (1963), the Supreme Court ruled that the Constitution requires the states to provide defense attorneys to criminal defendants charged with serious offenses who cannot afford lawyers themselves.

What was some events from 1600 - 1700 including pirates 20 POINTS!!! PLEASE ASP

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The era of piracy began in the 1500’s and faded by the 1830’s. Their presence was consistent in the Caribbean from 1623-1638 which ended due to navies of Western Europe and North Americans combatting the pirates. Pirates were most successful from 1660-1730’s. Particularly during the 1600’s, maritime technology began innovation. Trading traffic increased, which for pirates meant more ships to ransack and give rise to their piracy. By the 1690’s, pirates began a route they named the “Pirate Round.” They would sail from the Indian to the Red Sea, searching for trade ships deploying from India. 1718 was the beginning of the end for the “Golden Age of Piracy.” Two years later, in 1720, the English captured famous pirate Jack Rackham and his two female shipmates. In 1722, the wealthiest pirate known had died. His name was Bartholomew Roberts. By 1730, this era had ended.

The era of piracy sorry for not writing much my phone

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