Nepheline Syenite Rock | History

Definition

Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz

History

Origin

Discoverer

Unknown

Etymology

From origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Granular

Color

Brown, Buff, Cream, Green, Grey, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

81% - Igneous Rocks Rocks have it !

Scratch Resistant

✔ ✘

86% - Igneous Rocks Rocks

Stain Resistant

✔ ✘

66% - Igneous Rocks Rocks have it !

Wind Resistant

✔ ✘

49% - Igneous Rocks Rocks have it !

Acid Resistant

✔ ✘

48% - Igneous Rocks Rocks have it !

Appearance

Banded and Foilated

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Flooring, Homes, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Cemetery Markers, Creating Artwork

Types

Borolanite and Litchfieldite

Features

Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Nepheline Syenites are formed due to alkaline igneous activities and are generally formed in thick continental crustal areas or in Cordilleran subduction zones.

Composition

Mineral Content

Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite

Compound Content

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

Transformation

Metamorphism

✔ ✘

97% - Igneous Rocks Rocks have it !

Types of Metamorphism

Burial Metamorphism, Impact Metamorphism

Weathering

✔ ✘

99% - Igneous Rocks Rocks have it !

Types of Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

92% - Igneous Rocks Rocks have it !

Types of Erosion

Chemical Erosion

Properties

Physical Properties

Hardness

5.5-6

1 7

👆🏻

Grain Size

Fine Grained

Fracture

Conchoidal to Uneven

Streak

White

Porosity

Less Porous

Luster

Greasy to Dull

Compressive Strength

150.00 N/mm²

Rank: 22 (Overall)

0.15 450

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Cleavage

Toughness

Specific Gravity

2.6

0 8.4

👆🏻

Transparency

Translucent to Opaque

Density

2.6 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.71 kJ/Kg K

Rank: 23 (Overall)

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Indonesia, Iran, Russia, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Turkmenistan, Vietnam

Africa

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

Europe

Andorra, Finland, France, Great Britain, Italy, Norway, Portugal, Spain, Sweden

Others

Greenland

Deposits in Western Continents

North America

Canada, USA

South America

Brazil, Chile, Colombia, Uruguay, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, Queensland, South Australia, Tasmania, Western Australia