ALLOTROPE
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Carbon (Cmma polymorph)

Carbon (Cmma polymorph)

allotrope
C
Theoretical

A theoretical high-pressure carbon structure studied by materials scientists

← Allotrope of Carbon

A crystalline allotrope of Carbon (space group C m m a), sourced from the Crystallography Open Database (COD 9012235).

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Crystallography

Catalogue identityCarbon — C m m a - C m m a
FormulaC
Crystal systemorthorhombic
Space groupC m m a
Lattice (a, b, c) Å4.964, 5.163, 4.387
Angles (α, β, γ) °90, 90, 90
Density (g/cm³)2.838
DeterminationTheoretical (computed)

Structure data: Crystallography Open Database · Public domain (CC0)

Allotropes

Carbon — C c m m

Carbon — C c m m

Carbon — C m m m

Carbon — C m m m

Carbon — F d -3 m

Carbon — F d -3 m

Carbon — F m -3

Carbon — F m -3

Carbon — F m m m

Carbon — F m m m

Carbon — I -4 3 d

Carbon — I -4 3 d

Carbon — I a -3

Carbon — I a -3

Carbon — I m -3

Carbon — I m -3

Carbon — I m m m

Carbon — I m m m

Carbon — P 42/m m c

Carbon — P 42/m m c

Carbon — P 63 m c

Carbon — P 63 m c

Carbon — P 64 2 2

Carbon — P 64 2 2

Carbon — P 6/m m m

Carbon — P 6/m m m

Carbon — P a -3

Carbon — P a -3

Carbon — P b a n :1

Carbon — P b a n :1

Carbon — P c c a

Carbon — P c c a

Carbon — P n n m

Carbon — P n n m

Carbon — R -3 m :H

Carbon — R -3 m :H

Carbon — R -3 m :R

Carbon — R -3 m :R

Diamond

Diamond

Graphite

Graphite