Gonnardite is a tectosilicate belonging to the natrolite group. The natrolite minerals are composed of chains of AlO 4 and SiO 4 tetrahedra that link to form frameworks. As with all zeolites, there are channels within the framework, and for the natrolite minerals the channels are occupied by polyhedra containing sodium , calcium or barium ...

Named in honor of Ferdinand-Pierre-Joseph Gonnard (30 March 1838, Gannat, Allier, France - 16 October 1923, Lyon, Rhône, France), Professor of Mining Engineering at the University of Lyon, France. He wrote mineral summaries of regions of France and earlier found gonnardite, but described it as mesole (thomsonite). He also discovered dumortierite.

Comments: White, pseudocubic crystals of tetranatrolite (gonnardite) on matrix. Location: Point of Rocks Mesa, Colfax County, New Mexico, USA. Scale: Not Given.

The plot reveals that most high-Na mesolites are ranites, a number of gonnardites are ranites and one or two are tetranatrolites. The compositional field of gonnardite crosses that of mesolite (and pseudomesolite), but these minerals can be easily distinguished …

The earliest growth of many natrolite clusters appears to be gonnardite, and as growth slows the crystal becomes ordered. Gonnardite clusters occurs in two principal environments, in cavities of altered basaltic lavas and as hydrothermal alteration of crystallization products in syenite.

纖沸石 (Gonnardite). Gonnardite是一種相對稀有的纖維狀沸石，鈉沸石。 較早的論文聲稱，四鈉鋁石和菱鎂礦之間存在完全固溶體，但在1999年四鈉鋁石被認為是一個單獨的物種。

1999年9月1日 · The crystal structure of gonnardite from syenite pegmatite in larvikite of the Vevja quarry, Tvedalen, Langesund district, Norway, has been determined and refined to R 2.2% in space group I42d, a...

Gonnardite Na2CaAl4Si6O20² 7H2O °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Tetragonal. Point Group: 42m: Fibrous crystals, at the centers of radiating spherulites, to 3 cm; massive. Physical Properties: Hardness = 5 D(meas.) = 2.25{2.36 D(calc.) = 2.33 Optical Properties: Translucent. Color: White, yellowish to salmon-red ...

White gonnardite covers compact, radial, blue thomsonite-Ca on green smectite rarely in some of the Eocene basalt near Big Tree Creek, Yacolt, Clark County, Washington. Specimen was collected by Rudy Tschernich in 1987.

1999年9月1日 · Only recently was the structural relationship to natrolite confirmed unambiguously by single crystal X-ray diffractometry. The present chemical and crystallographic study re-examines gonnardite type material from Puy-de-Dôme, France (British Museum specimen no. BM1930-166), to define its relationship to tetranatrolite.