Harmotome is a mineral, one of the rarer zeolites; a hydrated barium silicate with formula: (Ba 2 (Si 12 Al 4)O 32 ·12H 2 O. [1] It forms vitreous white well defined monoclinic crystals, often associated with calcite and other zeolites.

Refinement of the crystal structure of phillipsite and harmotome Acta Crystallographica B30 2426-2433. Cavities in basalts, phonolites, trachytes, gneisses and some hydrothermal veins. Natural History Museum, Paris, France.

harmotome, hydrated barium aluminosilicate mineral, (Ba,Na,K) 1–2 (Si,Al) 8 O 16 ∙ 6H 2 O, in the zeolite family. Harmotome is isostructural with the mineral phillipsite; that is, the three-dimensional structure of the aluminosilicate framework is the same in the two substances.

A transparent, spindle-shaped variety of harmotome that was originally described from the Strontian mines north of Morven (now Morvern), Argyllshire, Scotland, UK. Later used to describe a type of twinning also observed for phillipsite (a different type ...

Harmotome. Comments: Root beer colored calcite covered with harmotome crystals from 1 mm to 1 cm. Location: Strontian Hills, Strontian, Argyll, Scotland. Scale: 5.5 x 4.5 cm. © John Veevaert

2024年10月21日 · Discover 30 intriguing facts about Harmotome, a rare zeolite mineral known for its unique crystal structure and fascinating geological properties.

Harmotome (Ba;K)1¡2(Si;Al)8O16² 6H2O °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. Point Group: 2=m: Crystals elongated k [001] or tabular k f010g; typically striated on f010g k [001]. Commonly as interpenetrant twins, to 4 cm, alone, in groups, or radiating aggregates.

The meaning of HARMOTOME is a mineral (Ba,K) (Al,Si)2Si6O16.6H2O consisting of a hydrous silicate of aluminum, barium, and potassium.

Chemistry: BaAl 2 Si 6 O 16 - 6H 2 O, Hydrated barium aluminum silicate. Uses: Mineral specimen and chemical filter. Harmotome is one of the rarer zeolites, but is popular among zeolite and twin collectors. Its twins are considered classics among collectors who like twinned minerals.

Harmotome was named by Haüy (1801), renaming andreasbergolite (also known as andéolite) of Delamétherie (1795). The type locality is Andreasberg, Harz, Germany. The name comes from the Greek armos, a joint, and tome, to cut, referring to the morphology of twinned crystals.