Magnesium oxide doesn't exist in gaseous form. It occurs naturally in mineral form - as periclase. In refined form - it is a white solid

MgO is the chemical formula for magnesium oxide, a white solid mineral that occurs naturally as periclase. It is commonly used in industry as a refractory material and in medicine as an antacid. Magnesium oxide is also a component of some cements and building materials.

Magnesium oxide has a chemical formula of MgO, which means it is composed of one magnesium atom bonded to one oxygen atom. It is a white solid that occurs in nature as the mineral periclase.

Magnesium and oxygen combine to form magnesium oxide (MgO). Magnesium oxide is a white solid that occurs naturally as the mineral periclase. It is commonly used in various industrial applications, including as a refractory material and in the production of ceramics.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 18 words with the pattern P-R----S-. That is, nine letter words with 1st letter P and 3rd letter R and 8th letter S. In alphabetical order, they are:

parablast

parcheesi

parsonish

periblast

periclase

periplasm

periplast

perkiness

personise

phrasiest

piroplasm

porkiness

porteress

porthouse

portliest

purpliest

pursiness

pyroclast

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 25 words with the pattern P--I-L---. That is, nine letter words with 1st letter P and 4th letter I and 6th letter L. In alphabetical order, they are:

palillogy

panislams

papillary

papillate

papilloma

papillons

papillose

papillote

papillous

papillule

pavillons

penillion

periblast

periblems

periclase

pericline

perilling

periplasm

periplast

petillant

petiolate

petiolule

pupillage

pupillary

pupillate

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 24 words with the pattern -ER-C----. That is, nine letter words with 2nd letter E and 3rd letter R and 5th letter C. In alphabetical order, they are:

ceraceous

cerecloth

feracious

ferocious

mericarps

merocrine

merycisms

pericarps

periclase

pericline

pericones

pericopae

pericopal

pericopes

pericopic

pericycle

reracking

rerecords

sericeous

sericites

sericitic

veracious

xerically

xerochasy

Magnesium oxide, or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium. It has an empirical formula of MgO and consists of a lattice of Mg²⁺ ions and O²⁻ ions held together by ionic bonding

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 39 words with the pattern --RI-L---. That is, nine letter words with 3rd letter R and 4th letter I and 6th letter L. In alphabetical order, they are:

aerialist

aeriality

agriology

carillons

curialism

curialist

ebrillade

gorillian

gorilline

gorilloid

hariolate

kyrielles

marialite

meritless

periblast

periblems

periclase

pericline

perilling

periplasm

periplast

serialise

serialism

serialist

seriality

serialize

shrillest

shrillier

shrilling

stridling

stripling

thrillant

thrillers

thrillier

thrilling

variolate

variolite

varioloid

variolous

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 80 words with the pattern -ER---A--. That is, nine letter words with 2nd letter E and 3rd letter R and 7th letter A. In alphabetical order, they are:

aerobrake

aerograms

aerograph

aerophagy

aeroplane

aerospace

aerostats

aerotrain

berascals

bergamask

berghaans

bergomask

berimbaus

berrigans

cerebrals

cerebrate

cerograph

ceruleans

cervelats

fernshaws

fertigate

geranials

germinant

germinate

germplasm

hercogamy

hereaways

herkogamy

hermitage

hernshaws

jeremiads

jeroboams

jerricans

jerrycans

kerygmata

mercenary

mercurate

meridians

perborate

percolate

perennate

perforans

perforant

perforate

perfusate

periblast

periclase

periodate

periplasm

periplast

peritrack

permutate

personage

personals

personate

pertusate

pervicacy

reradiate

rerebrace

rerelease

rerepeats

serigraph

serrulate

servquals

terebrant

terebrate

termagant

terminals

terminate

termitary

terramara

terramare

verandaed

verandahs

verberate

verminate

verticals

xeriscape

xerochasy

xerophagy

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 80 words with the pattern P-R-----E. That is, nine letter words with 1st letter P and 3rd letter R and 9th letter E. In alphabetical order, they are:

parabrake

parachute

paraclete

paracrine

paraffine

paraglide

paragogue

parapente

pararhyme

parasceve

parbuckle

pardalote

parentage

parfleche

pargasite

pargyline

parhypate

parochine

parolable

parricide

parsonage

partitive

partridge

parvoline

perborate

percaline

perceable

perchance

percolate

peregrine

perennate

perforate

perfusate

perfusive

periclase

pericline

pericopae

pericycle

peridrome

periodate

periodide

periscope

peristome

peristyle

permeable

permeance

permittee

permutate

persecute

perseline

persevere

persienne

personage

personate

personise

personize

pertusate

perusable

pervasive

pirouette

porbeagle

porcupine

poroscope

porporate

portatile

portative

porterage

porthouse

portreeve

porwiggle

purgative

purgeable

purposive

purselike

pursuable

pursuance

purulence

pyreneite

pyrophone

pyroscope

1. Chemical component and mineral composition

The chemical component of magnesia brick and varies with the raw materials composition. General magnesium oxide is 55% ~ 60%, the amount of chromium trioxide is about 10%, followed by ferric oxide and a small amount of oxide such as two aluminum dioxide aluminum, silica, calcium oxide and other impurities.

The mineral composition of magnesia brick is mainly magnesium chromium spinel acid magnesium ferrite.

2. Because periclase content of magnesia brick is less than magnesia brick, magnesia chrome spinel and magnesium ferrite content is much , and their melting point of eutectic compounds is lower, so the refractoriness of magnesia chrome brick magnesia brick is low, usually only 1850 ~ 1960 ℃.

3. Refractoriness under load

Periclase crystals of magnesia brick and magnesia chrome spinel is easy to form a mesh skeleton, by filling in the Internet clearance of low melting point no quality is less, when bear high temperature load, while the low melting point material softening, but mesh skeleton still can support the load, so the magnesia brick of refractoriness under load is high, average more than 1550 ℃.A little lower than magnesia brick refractoriness, and refractoriness under load is higher than magnesia brick is a significant characteristic of magnesia chrome brick.

4. Thermal expansion and thermal shock resistance

Magnesia chrome spinel of magnesia brick and magnesium ferrite content is much and linear expansion coefficient is small, at the same time, the porosity of magnesia chrome brick is larger than magnesia brick, so, heat dilatability of magnesia chrome brick is small.

Monticellite content in magnesia brick is few, is not easy to cause differential expansion stress. Magnesium ferrite solid soluble in magnesia chrome spinel, solubility temperature range is very wide, Magnesium ferrite into and precipitation, not make a big stress, therefore, magnesia chrome brick has good thermal shock stability, water-cooled frequency can be up to among 25 times.

5. The slag resistance

The most content of magnesia chrome spinel in magnesia brick is compound of magnesium oxide and chromium trioxide, and chromium trioxide is a typical neutral oxide, therefore, magnesia brick of alkaline and acidic slag has strong ability of resistance.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 95 words with the pattern -E---L--E. That is, nine letter words with 2nd letter E and 6th letter L and 9th letter E. In alphabetical order, they are:

aeroplane

beastlike

bellylike

bengaline

benzoline

berrylike

cellulase

cellulite

cellulose

cephalate

deathlike

decollate

decollete

fencelike

fertilise

fertilize

feudalise

feudalize

feuillete

genialise

genialize

gentilise

gentilize

heathlike

heelplate

helicline

jellylike

jewellike

leechlike

legislate

lemonlike

lemurlike

medullate

mentalese

mescaline

messaline

metallike

metalline

metallise

metallize

methylase

methylate

methylene

mezcaline

nepheline

nephelite

pectolite

pendulate

penduline

peneplane

pentylene

percaline

percolate

periclase

pericline

perseline

petallike

petiolate

petiolule

petrolage

reanalyse

reanalyze

recyclate

reenslave

reexplore

reinflame

reinflate

remoulade

resinlike

reutilise

reutilize

reviolate

segholate

semiplume

sensillae

sepiolite

sequelise

sequelize

serialise

serialize

serpulite

serrulate

sewerlike

sexualise

sexualize

tesselate

tessellae

ventilate

verbalise

verbalize

vernalise

vernalize

vexillate

wedgelike

yeastlike

Diamonds, Rubies, Emeralds, Opal, and Sapphires are some gemstones that come to mind when we think of jewels. At a quick glance I can count more than 130 gemstones in my reference book. Gemstones are broken down by the scientific community into 10 specific mineral classes. To keep this simple, we will use the common terms for gemstones of precious, semiprecious, organic, and exotic. The following list is not all-inclusive, but is a good start.

PRECIOUS gemstones are: diamond, sapphire, ruby, and emerald.

LIST OF SEMIPRECIOUS GEMSTONES (PARTIAL LIST):

Amber (Amber)

Amethyst (Quartz)

Ametrine (Quartz)

Apatite (Apatite)

Aquamarine (Beryl)

Agate (Chalcedony) (red-banded agate is shown under sard)

Alexandrite (Chrysoberyl)

Azurite

Benitoite (Benitoite)

Beryl (Beryl)

Bloodstone (Chalcedony)

Carnelian (Chalcedony)

Chalcedony

Chrome Diopside (Diopside)

Chrysoberyl (Chrysoberyl)

Chrysoprase (Chalcedony)

Chrysocolla

Citrine (Quartz)

Diamond (Diamond)

Emerald (Beryl)

Fluorite

Garnet (Almandine, Andratite, Grossularite, Pyrope, Spessartine, Uvarovite)

Heliodore (Beryl)

Heliotrope (Chalcedony)

Hematite

Hessonite (Grossularite)

Hiddenite (Spodumene)

Iolite (Cordierite)

Jade (Jadeite or Nephrite)

Jasper (Chalcedony)

Kunzite (Spodumene)

Kyanite

Labradorite

Lapis Lazuli (Lazurite)

Malachite (Malachite)

Moonstone (Albite, Microcline Feldspar, Orthoclase, Plagioclase)

Morganite (Beryl)

Onyx (Chalcedony)

Opal (Opal)

Pearl

Peridot (Olivine)

Quartz (Quartz)

Rhodochrosite (Rhodochrosite)

Rhodolite (Almandine-Pyrope Garnet)

Rock Crystal (Quartz)

Rose Quartz (Quartz)

Ruby (Corundum)

Sapphire (Corundum)

Sard (Chalcedony)

Sardonyx

Sinhalite (Sinhalite)

Sodalite (Sodalite)

Spinel (Spinel)

Sugilite (Sugilite)

Sunstone (Oligoclase Feldspar)

Tanzanite (Zoisite)

Titanite (Sphene)

Topaz (Topaz)

Tourmaline (Tourmaline)

Tsavorite (Grossularite)

Turquoise (Turquoise)

Zircon (Zircon)

ORGANIC GEMSTONES INCLUDE:

ORGANIC:

Amber

Copal (young amber 3-7 million years old)

Coral

Pearls

LESSER KNOWN SEMIPRECIOUS GEMSTONES:

(Not commonly known, but are becomingly increasingly more popular especially in custom designed jewelry.)

Amblygonite

Andalusite

Apatite

Axinite

Benitoite (Benitoite)

Beryllonite

Brazilianite

Cassitierite

Cerussite

Danburite

Diopside

Dioptase

Dumortierite

Enstatite

Epidote

Euclase

Hambergite

Hemimorphite (also called Calamine)

Idocrase

Kornerupine (also called Prismatine)

Kyanite

Lazulite

Petalite

Phenakite

Prehnite

Scapolite

Scheelite

Serpentine

Sinhalite (Sinhalite)

Smithsonite (also called Bomamite)

Sphalerite

Sphene (Titanite)

Stitchite

Ulexite

Variscite (also called Utahlite)

EXOTIC GEMSTONES:

(Called this for a number of reasons. Many of these are hard to fine and not available in large quantities, others are brittle or break easily and therefore are not suitable for jewelry. These gemstones are generally owned by collectors and do not make it to the marketplace.)

This list could be quite long, I have included only a few to give you an idea of some that are in this category.

Actinolite

Ametrine

Aragonite

Bixbite

Clinohumite

Diasphore

Dolomite

Hypersthene

Labradorite

Muscovite

Olioclase

Periclase

Phosphophyllite

Pietersite

Rutile

Willemite

Wulfenite