Calcite – Eskifjordur, Iceland. This remote area of Iceland is the type locality for the Iceland Spar variety of calcite (CaCO3; type locality is the place where a mineral or rock best exemplifies its standard description, often where it was first discovered). Iceland Spar calcite is exceptionally clear and optically transparent, whereas other types of calcite can have a wide range of colors and translucencies (see photo in the Problem 10 placemark). Given this, which of the following is not a diagnostic property for calcite?
a. cleavage at three directions not at ~90°.
b. hardness of 3.
c. color.
d. effervesces (forms CO2 bubbles) with hydrochloric acid.

Answers

Answer 1

Answer:

Color

Explanation:

Calcite is a carbonate mineral which is found in different countries and has over 800 different forms. Calcite has cleavage at three directions which forms rhombic shape but the angles is not 90 degrees. It has hardness of 2 and is effervesces with hydrochloric acid. Color is not a diagnostic property of Calcite.


Related Questions

Why do YOU think it is important to study and understand other cultures from around the world?

Answers

Because we can learn to appreciate what others do differently from us

Answer:

It's important to preserve history of different groups from around the world that benefit the land, water, and overall social function of the past.

Explanation:

causes and the effects of the fohn winds on the environment

Answers

Explanation:

There are four known causes of the foehn warming and drying effect.[1] These mechanisms often act together, with their contributions varying depending on the size and shape of the mountain barrier and on the meteorological conditions, such as the upstream wind speed, temperature and humidity.

*Condensation and precipitation

، Isentropic draw-down

*Mechanical mixing

*Radiative warming

Winds of this type are also called "snow-eaters" for their ability to make snow and ice melt or sublimate rapidly. This is a result not only of the warmth of foehn air, but also its low relative humidity. Accordingly, foehn winds are known to contribute to the disintegration of ice shelves in the polar regions.[7]

Effect :

Foehn winds are notorious among mountaineers in the Alps, especially those climbing the Eiger, for whom the winds add further difficulty in ascending an already difficult peak.

They are also associated with the rapid spread of wildfires, making some regions which experience these winds particularly fire-prone.

By which colour settlement is represented in toposheet ?​

Answers

Answer:

Red

Hi, Red is the colour to represent settlements on a topo map.

Help plzzz & THANKSSSS <3

Answers

Answer:

stockholm

Explanation:

the last option

It is Stockholm.........

Why was the new experiment highlighted in the article considered to be a “modest milestone”?

Answers

Answer:

The new experiment produced about 10 times as much energy as the previous experiment. Scientists considered this increase to be a modest achievement.

Explanation:

same thing the sped above me said

Answer:

The new experiment produced about 10 times as much energy as the previous experiment. Scientists considered this increase to be a modest (average) achievement.

Explanation:

edmentum

Dairy calves account for approximately 14% of beef production in the United States.
A. True
B. False

Answers

Dairy calves account for approximately 14% of beef production in the United States.
A. True
B. False
It’s (A)

30°
(9x-6)
(4x)
What is the value of x?

Answers

Answer:

The value of [tex]x[/tex] is 11.077.

Explanation:

The information of the statement is incomplete, given all these brief descriptions, we infer that this exercise is asking to find the value of [tex]x[/tex] associated to internal angles of a triangle.

From Geometry, we know that sum of internal angles equals 180º. Then, we construct the following expression:

[tex]30^{\circ}+(9\cdot x-6)+4\cdot x = 180^{\circ}[/tex] (1)

Lastly, we solve for [tex]x[/tex]:

[tex]36^{\circ}+13\cdot x = 180^{\circ}[/tex]

[tex]13\cdot x = 144^{\circ}[/tex]

[tex]x = 11.077[/tex]

The value of [tex]x[/tex] is 11.077.

Which of the follow are reasons why immigrants from Asia and North Africa going to Europe?
O A. To seek religious persecution
o B. Fleeing war and seek economic opportunities
O
c. Seeking warmer climates
O D. Trying to escape from higher education

Answers

Im pretty sure it's B!

......

Answer:

B. Fleeing war and seek economics opportunities

Explanation: The answer cannot be A, as they are not seeking religious persecution, in some of these areas they are. It cannot be C as the Middle East and North Africa are some of the warmest climates of the world. Which leaves us with B and D. It is B as many countries such as Syria have many refugees leaving, and they are currently in a civil war, with Europe having more economic opportunities.

1. Identify the global pattern of migrant distribution.

Answers

I don’t see a problem here, you might need to repost this with a picture.
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