Araucaria bidwillii: Difference between revisions

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== Antimony Trioxide ==
{{DISPLAYTITLE:''Araucaria bidwillii''}}


[[File:Antimony_trioxide.jpg|thumb|Antimony trioxide powder]]
[[File:Palacio-Monserrate_Araucaria_SET-07.jpg|thumb|''Araucaria bidwillii'']]


'''Antimony trioxide''' is a chemical compound with the formula Sb<sub>2</sub>O<sub>3</sub>. It is the most important commercial compound of [[antimony]]. The compound is found in nature as the minerals [[senarmontite]] and [[valentinite]].
'''''Araucaria bidwillii''''', commonly known as the [[Bunya pine]], is a species of conifer in the family [[Araucariaceae]]. It is native to [[Queensland]], [[Australia]], and is notable for its large size and distinctive, edible seeds. The species is named after the botanist [[John Carne Bidwill]].


== Structure ==
==Description==
Antimony trioxide exists in two crystalline forms: cubic and orthorhombic. The cubic form is known as senarmontite, while the orthorhombic form is known as valentinite. In both forms, the antimony atoms are in a +3 oxidation state, and the oxygen atoms are in a -2 oxidation state.
''Araucaria bidwillii'' is a large evergreen tree that can grow up to 30–45 meters tall, with a trunk diameter of up to 1.5 meters. The tree has a straight trunk and a symmetrical, dome-shaped crown. The leaves are tough and leathery, arranged spirally on the branches. They are lanceolate to linear, measuring 2–5 cm long and 0.5–1 cm wide.


=== Senarmontite ===
The tree is dioecious, with male and female cones on separate trees. The male cones are cylindrical, measuring 10–20 cm long, while the female cones are large, spherical, and can weigh up to 10 kg. The seeds, known as bunya nuts, are large and edible, traditionally consumed by Indigenous Australians.
[[File:Sb4O6-molecule-from-senarmontite-xtal-2004-3D-balls-B.png|thumb|left|Molecular structure of senarmontite]]
Senarmontite has a cubic crystal structure. In this form, the antimony atoms are coordinated to three oxygen atoms, forming a pyramidal shape. This structure is similar to that of arsenic trioxide.


=== Valentinite ===
==Habitat and Distribution==
[[File:Antimony(III)-oxide-valentinite-xtal-2004-3D-balls.png|thumb|left|Molecular structure of valentinite]]
[[File:Bunya_(Araucaria_bidwillii)_in_habitat,_Bunya_Mountains_NP,_Queensland_1.jpg|thumb|left|''Araucaria bidwillii'' in habitat, Bunya Mountains National Park, Queensland]]
Valentinite has an orthorhombic crystal structure. In this form, the antimony atoms are also coordinated to three oxygen atoms, but the arrangement is different from that in senarmontite, leading to a different crystal symmetry.


== Production ==
''Araucaria bidwillii'' is found in the rainforests of southeast Queensland, particularly in the [[Bunya Mountains]] and [[Blackall Range]]. It grows in well-drained soils and prefers a subtropical climate. The species is adapted to survive in areas with high rainfall and humidity.
Antimony trioxide is produced by roasting antimony sulfide ores or by oxidizing antimony metal. The process involves the reaction of antimony with oxygen to form the trioxide:


: 4 Sb + 3 O<sub>2</sub> _ 2 Sb<sub>2</sub>O<sub>3</sub>
==Ecological and Cultural Significance==
The bunya pine holds significant cultural importance for Indigenous Australians, particularly the [[Wakka Wakka]] and [[Gubbi Gubbi]] peoples. The seeds were traditionally harvested during large gatherings known as "bunya festivals," which were important social and cultural events.


The product is then purified by sublimation.
Ecologically, ''Araucaria bidwillii'' provides habitat and food for various wildlife species. The large seeds are a food source for birds and mammals, while the tree itself offers shelter and nesting sites.


== Applications ==
==Conservation==
Antimony trioxide is used as a flame retardant in plastics, textiles, and electronics. It is also used as a catalyst in the production of [[polyethylene terephthalate]] (PET) and as an opacifying agent in the manufacture of glass and ceramics.
''Araucaria bidwillii'' is not currently considered threatened, but its habitat is subject to pressures from land clearing and development. Conservation efforts focus on protecting its natural habitat and promoting sustainable land management practices.


== Health and Safety ==
==Uses==
Antimony trioxide is considered a potential occupational carcinogen. Exposure to antimony trioxide can occur in industrial settings, and it is important to follow safety guidelines to minimize exposure.
The seeds of ''Araucaria bidwillii'' are edible and have been used as a food source for centuries. They can be eaten raw or cooked and are often roasted or boiled. The wood of the bunya pine is also valued for its quality and is used in construction and furniture making.


== Related Pages ==
==Related Pages==
* [[Antimony]]
* [[Araucariaceae]]
* [[Senarmontite]]
* [[Conifer]]
* [[Valentinite]]
* [[Queensland]]
* [[Flame retardant]]
* [[Bunya Mountains]]


== Gallery ==
[[Category:Araucariaceae]]
<gallery>
[[Category:Flora of Queensland]]
File:Antimony(III)-oxide-senarmontite-xtal-2004-3D-balls.png|3D structure of senarmontite
[[Category:Trees of Australia]]
File:Antimony(III)-oxide-valentinite-xtal-2004-3D-balls.png|3D structure of valentinite
</gallery>
 
[[Category:Antimony compounds]]
[[Category:Oxides]]
<gallery>
File:Palacio-Monserrate_Araucaria_SET-07.jpg|Araucaria bidwillii
File:Bunya_(Araucaria_bidwillii)_in_habitat,_Bunya_Mountains_NP,_Queensland_1.jpg|Araucaria bidwillii in habitat, Bunya Mountains NP, Queensland
File:Araucaria_bidwillii_248817540.jpg|Araucaria bidwillii
File:Araucaria-bidwillii-ALA-1.jpg|Araucaria bidwillii
File:Araucaria_bidwillii_173687577.jpg|Araucaria bidwillii
File:Araucaria_bidwillii_173687590.jpg|Araucaria bidwillii
File:A_Bunya_Araucaria_bidwillii_cone.jpg|A Bunya Araucaria bidwillii cone
File:Bunya_Cone.jpg|Bunya Cone
File:Bunya-pine-wood.jpg|Bunya pine wood
File:Araucaria_bidwillii_cultivation.jpg|Araucaria bidwillii cultivation
</gallery>

Latest revision as of 10:58, 23 March 2025


Araucaria bidwillii

Araucaria bidwillii, commonly known as the Bunya pine, is a species of conifer in the family Araucariaceae. It is native to Queensland, Australia, and is notable for its large size and distinctive, edible seeds. The species is named after the botanist John Carne Bidwill.

Description[edit]

Araucaria bidwillii is a large evergreen tree that can grow up to 30–45 meters tall, with a trunk diameter of up to 1.5 meters. The tree has a straight trunk and a symmetrical, dome-shaped crown. The leaves are tough and leathery, arranged spirally on the branches. They are lanceolate to linear, measuring 2–5 cm long and 0.5–1 cm wide.

The tree is dioecious, with male and female cones on separate trees. The male cones are cylindrical, measuring 10–20 cm long, while the female cones are large, spherical, and can weigh up to 10 kg. The seeds, known as bunya nuts, are large and edible, traditionally consumed by Indigenous Australians.

Habitat and Distribution[edit]

Araucaria bidwillii in habitat, Bunya Mountains National Park, Queensland

Araucaria bidwillii is found in the rainforests of southeast Queensland, particularly in the Bunya Mountains and Blackall Range. It grows in well-drained soils and prefers a subtropical climate. The species is adapted to survive in areas with high rainfall and humidity.

Ecological and Cultural Significance[edit]

The bunya pine holds significant cultural importance for Indigenous Australians, particularly the Wakka Wakka and Gubbi Gubbi peoples. The seeds were traditionally harvested during large gatherings known as "bunya festivals," which were important social and cultural events.

Ecologically, Araucaria bidwillii provides habitat and food for various wildlife species. The large seeds are a food source for birds and mammals, while the tree itself offers shelter and nesting sites.

Conservation[edit]

Araucaria bidwillii is not currently considered threatened, but its habitat is subject to pressures from land clearing and development. Conservation efforts focus on protecting its natural habitat and promoting sustainable land management practices.

Uses[edit]

The seeds of Araucaria bidwillii are edible and have been used as a food source for centuries. They can be eaten raw or cooked and are often roasted or boiled. The wood of the bunya pine is also valued for its quality and is used in construction and furniture making.

Related Pages[edit]