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. It has a Mohs hardness of 4 …

交沸石（harmotome）是一种含水的碱和碱土金属的 铝硅酸盐矿物，工业上常用作分子筛。 交沸石的化学式为Ba [Al2Si5O16]·6H2O，属于含水的架状 铝硅酸盐矿物。 [1] 交沸石的晶体呈柱状，但通常以十字形贯穿双晶出现， 集合体 呈放射状或杏仁状。 解理平行 {010}完全；硬度4.5，相对密度2.35～2.44。 脱水后的交沸石吸收氢、氮、 二氧化碳 和氨的能力很强。 工业上用来作分子筛。 [1] 交沸石的晶系属于单斜晶系，a=9.87Å，b=14.14Å，c=9.72Å，β=124°50′。 对称 …

Usually contains minor Ca, K and Na in variable proportions. A previously used formula is (Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O. From the Greek for "joint" and "cutting," alluding to the frequently twinned crystals. Zeolite Group. Harmotome-Phillipsite-Ca Series.

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.

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.

Harmotome is a rare constituent of sediment and sedimentary rocks. Some of the early reported occurrences involve a mineral that under new definitions does not have sufficient barium. For example, the harmotome reported in the Big Sandy Formation of Arizona (Sheppard and Gude 1973) is now considered barian phillipsite-Na.

Harmotome is a mineral with formula of Ba 2 (Si 12 Al 4)O 32 ·12H 2 O. The corresponding IMA (International Mineralogical Association) number is IMA1997 s.p.. The IMA symbol is Hrm.

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

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 is a zeolite group mineral that occurs in cavities in basalts, phonolites and trachytes, in gneisses, and in some hydrothermal ore veins.