Home

Feature Article:

Job Offer Negotiations: Getting What You Want
You have worked hard at finding your next job. You have come through many obstacles and have reached your career objective. You have received a job offer. You’re thrilled. Mission accomplished. After all, what else is left to do? A majority of job...
...Read More



 

Crystalline Systems

Navigation

© 2004 gggems.com All rights reserved.

7 systems of crystallization: There are 32 possibilities of combinations of the elements of symmetry (axis of
rotation, symmetry plane, centers combined inversion and operations).
Since the discovery of the crystals reticular structure, one could show by calculation that to these 32 classes
which relate to the shapes of the crystals, correspond 230 types of network.
One immediately realizes the complexity of the reasoning which should be made to know all the possible
combinations. The 32 classes are grouped in 7 systems. Here are the figures.


CUBIC SYSTEM QUADRATIC SYSTEM HEXAGONAL SYSTEM

Go to Garnet

Go to Zircon

Go to Apatite

Diamond, garnet, spinell. Zircon Beryl, Apatite

--------------------------------------------------

TRIGONAL SYSTEM ORTHOROMBIC SYSTEM MONOCLINIC SYSTEM
(Subdivision of the hexagonal system) Go to Topaz

Go to Orthoclase

Go to Corundum Go to Tourmaline

Calcite, corundum, tourmaline, quartz. Chrysoberyl, topaz Orthoclase

-------------------------------------------------

TRICLINIC SYSTEM
The symmetry of crystals : appear the following symmetrical operations: > >
· Rotation

· Inversion by symmetry plane

· Inversion by a center

· Combination of rotation and inversion

The crystals show in their form and their
structure of the properties of characteristic
symmetry. And like there is a cor -
respondence between reticular plans and
faces of the crystals, there is a
fundamental correspondence between
internal symmetry and external symmetry.
We imagine the drawing of a tapestry, it
will repeat ourselves by a simple parallel
displacement (translation). When a crystal is examined, the first
All the geometrical operations which point which draws the attention is a
cause a repetition of the pattern are certain symmetry. One can see the
called operations of symmetry. In the repetition of faces identical to various
shape of the crystals (external format), places of the crystal. These repetitions
this translation does not appear directly. are controls by laws of symmetry,
On the other hand, in their morphology, Albite the way in which they are repeated
is determined by operators of
symmetry, there are three principal
types of them: Axis of symmetry,
symmetry plane and the center
of symmetry.

GGGEMS.COM

¦Gemology ¦ Corundums ¦ Tourmaline Characteristics ¦ Garnets ¦ Cutting Styles

About the Author

http://www.gggems.com/crystalline_system.htm

 

More Reading:


Dissatisfied with your job Stop Trying to Go it Alone

Your Salary What Are You Worth

Career Planning

Little Known Facts on The Importance of Self Image

Senior Approved Services Announces Hiring of Marketing/Sales Associates

 
Career Choices and Self Employment

Homeopathic Schools

Madagascar gem safari

Five Things To Do When You Work For A Jerk

Interview Skills That Attract Offers

Home

Business Search 
Business

Career
Internet-Marketing
Marketing

Additional Reading


Dissatisfied with your job? Stop Trying to Go it Alone!
Being dissatisfied with your job is a cycle, a very long and undesirable cycle. Here’s how it goes: -You start to lose interest in your job. Next thing you know you start to dread Monday’s and long for Fridays. Your energy, confidence, creativity...
...Read More

Your Salary: What Are You Worth?
Why is it a good idea to determine your worth? Whether you plan to stay at your current job or seek employment elsewhere, your assessment of your worth can become a bargaining chip should you choose to negotiate for higher compensation. It’s a...
...Read More

Career Planning
Career planning necessary to work out Career planning is one of those things you don’t learn about in school but what decisions you make with your career affect your future in more ways than one. No matter what choices you make regarding your...
...Read More

Little Known Facts on The Importance of Self Image
It is not a surprise to most people that health studies point to popular culture as a perpetrator of body image which has corresponded to the self image and well being of women AND men. What may surprise you is that this is not a new phenomenon....
...Read More

Senior Approved Services Announces Hiring of Marketing/Sales Associates
“We received nearly 3,000 phone calls from seniors and their family caregivers in the past twelve months searching for elder care services that were Certified Senior Approved”, states Barbara Mascio, founder of Senior Approved Services. “Clearly we...
...Read More