What are the 7 mineral properties?
Most minerals can be characterized and classified by their unique physical properties: hardness, luster, color, streak, specific gravity, cleavage, fracture, and tenacity.
Can quartz be scratched by a nail?
Terminology. Soft – can be scratched by a fingernail, Mohs’ 1-2; If a mineral cannot be scratched by a knife blade but can be scratched by quartz then its hardness is between 5 and 7 (stated as 5-7) on Mohs scale. A relative hardness value of 6.5 means that the mineral could scratch orthoclase (feldspar) but not quartz …
What are the 5 classifications of a mineral?
The broadest divisions of the classification used in the present discussion are (1) native elements, (2) sulfides, (3) sulfosalts, (4) oxides and hydroxides, (5) halides, (6) carbonates, (7) nitrates, (8) borates, (9) sulfates, (10) phosphates, and (11) silicates.
What is chemical properties of minerals?
Properties that help geologists identify a mineral in a rock are: color, hardness, luster, crystal forms, density, and cleavage. Crystal form, cleavage, and hardness are determined primarily by the crystal structure at the atomic level. Color and density are determined primarily by the chemical composition.
What are the two major properties of mineral?
A mineral species is defined by two distinct properties: (1) its chemical com- position and (2) its crystal structure. Each mineral has a distinct three- dimensional array of its constituent atoms. This regular geometry affects its physical properties such as cleavage and hardness.
Who are the major shareholders of PDM limited?
The major shareholders of PDM are the Aga Khan Fund for Economic Development (AKFED), Jubilee Holdings Limited and Nation Media Group Limited, all of which are part of AKDN.
Which is the main pillar of PDM’s business?
Property Development is the main pillar of PDM’s business. This encompasses residential, commercial, hospitality, retail and industrial sectors – whether for sale or retention. Historically the majority of these have been for PDM’s retention where the company derives rental income.
Where are the headquarters of pdm Real Estate Company?
It has helped shape the direction of real estate trends in the country by pursuing a philosophy of developing properties that serve an economic purpose and that also uplift the quality of life for the community. Our Headquarters are based in Kenya but the firm operates across the entire East African region.
How are EPDM compounds used in everyday life?
EPDM compounds are frequently used with foods, water, steam and phosphate ester fluids (Skydrol) applications and offer the excellent resistance to brake fluids (glycol base), weather, and ozone. EPDM’s are not used with petroleum oils or fuels because significant swelling would result.