harmotome

Also known as cross stone

Harmotome is a mineral, one of the rarer zeolites; a hydrated barium silicate with formula: . It forms vitreous white well defined monoclinic crystals, often associated with calcite and other zeolites. It has a Mohs hardness of 4 to 5 and a specific gravity of 2.44 to 2.5.

Key facts

Mineral.name: Harmotome
Mineral.image: Harmotome-227546.jpg
Mineral.imagesize: 280px
Mineral.category: Tectosilicate minerals
Mineral.group: Zeolite group, phillipsite subgroup
Mineral.IMAsymbol: Hrm
Mineral.system: Monoclinic
Mineral.class: Prismatic (2/m) (same H-M symbol)
Mineral.symmetry: P21/m
Mineral.gravity: 2.44 to 2.5

via Wikipedia infobox

Wikidata facts

Image: Harmotome-190503.jpg

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Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 9.GC.10
Commons category: Harmotome
Nickel-Strunz 9th edition (updated 2009): 9.GC.10
IMA Mineral Symbol: Hrm
chemical formula: Ba₂(Si₁₂Al₄)O₃₂·12H₂O
Strunz 8th edition (series ID, updated): VIII/F.13

Sources (1)

wikidata.org

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Article

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Contents

Name and discovery
Location
References

==Name and discovery== Named from the Greek words (a joint) and (to cut) by René Just Haüy in 1801 because the pyramid divides parallel to the plane that passes through the terminal edges. It was first described in 1801 from an occurrence in the Harz Mountains, Lower Saxony, Germany.