シンプソン石

Simpsonite has a general formula of . It occurs as euhedral to subhedral tabular to short and prismatic crystals, commonly in subparallel groups. Under the petrographic microscope it has a very high relief.

In the Vinony graph

Within Vinony's link graph, シンプソン石 is referenced by 7 other articles, and connects out to tantalite, Brazil and Western Australia.

Vinony files it under Aluminium minerals, Minerals described in 1938 and Minerals in space group 143.

Its subject is documented across 9 Wikipedia language editions.

Key facts

Mineral.mohs: 7–7.5
Mineral.name: Simpsonite
Mineral.category: Oxide minerals
Mineral.image: Simpsonite-154999.jpg
Mineral.imagesize: 300px
Mineral.caption: Locality: Alto do Giz pegmatite, Rio Grande do Norte, Brazil. Size: 1.6 × 1.5 × 1.8 cm.
Mineral.IMAsymbol: Spn
Mineral.molweight: 813.65 g/mol
Mineral.strunz: 4.DC.10
Mineral.system: Trigonal
Mineral.class: Pyramidal (3) H-M symbol: (3)
Mineral.symmetry: P3
Mineral.unit cell: a = 7.37, c = 4.51 [Å]; Z = 1
Mineral.color: White to cream, yellow to yellow-brown when altered
Mineral.habit: Euhedral, prismatic, striated
Mineral.cleavage: None
Mineral.fracture: Conchoidal
Mineral.tenacity: Brittle