Apophyllite and Stilbite-Ca
| ID | 104 | |
|---|---|---|
| Mineral |
Apophyllite
Stilbite-Ca |
|
| Location | Poona - Maharashtra - India | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Apophyllite information at mindat.org View Stilbite-Ca information at mindat.org |
|
Mindat data
| ID | 283 |
|---|---|
| Long ID | 1:1:283:7 |
| Entry type | 5 |
| About the name | From the Greek for "away from" (ἀπό, apo) and "leaf" (φύλλον, phyllos), in allusion to the way it exfoliates upon heating. |
| shortcode_ima | Apo |
| ID | 7313 |
|---|---|
| Long ID | 1:1:7313:0 |
| Formula |
NaCa4(Si27Al9)O72 · 28H2O
|
| IMA Status |
0 1 |
| Other Occurrences | A low temperature hydrothermal mineral, in amygdules and cavities in basalt. |
| Diapheny | Transparent,Translucent |
| Cleavage | on {010} |
| Colour | White, colourless, red, light yellow, light to dark brown, cream, orange, pink |
| Hardness (min) | 3.5 |
| Hardness (max) | 4.0 |
| Lustre | Vitreous , Pearly |
| About the name | Named in 1797 by Jean Claude de la Métherie from Greek στιλβη "stilbein", to glitter or shine, or "stilbe", a mirror, alluding to its pearly or vitreous luster. Originally, but inconsistently called zeolite in 1756 by Axel Cronstedt. Named crystalii ad centrum tendentes in 1758 by Cronstedt. In 1772, Johan Gottschalk Wallerius called this mineral zeolite selenitica lamellaris. Also in 1797, de la Métherie called this mineral zeolite nacrée. Werner (1780) called this mineral strehliger zeolith. Rene Just Haüy (1801) used the term stilbite anamorphique for a mineral now recognized as heulandite. Desmine was introduced in 1818 by Johann Friedrich August Breithaupt. Sphaerostilbite was used in 1832 by François Sulpice Beudant. Additional varietal names and synonyms have been proposed: blättricher zeolit, hypostilbite, puflerite, radiated zeolite, and syhedrite. Chemical suffixes were added by the IMA. |
| Streak | White |
| Crystal System | Monoclinic |
| Cleavage Type | Perfect |
| Fracture type | Irregular/Uneven |
| Morphology | Typically thin tabular, sheaflike or globular clusters. |
| Twinning | Ubiquitous on {001}, cruciform and penetration. |
| UV | May fluoresce pale-yellow or blue-white in shortwave UV. |
| Comment Luster | Pearly on cleavage |
| shortcode_ima | Stb-Ca |
| Group | Stilbite Subgroup |
Details
Price: € 20
Dimensions: Not registered
Weight: 221 g
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| Al | Aluminium | |
| Ca | Calcium | |
| H | Hydrogen | |
| Na | Sodium | |
| O | Oxygen | |
| Si | Silicium |