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Apophyllite-(KF)
Millington Quarry (Morris County Crushed Stone Co. Quarry; Tilcon Quarry), Bernards Township, Somerset Co., New Jersey, USA
© Frank A. Imbriacco III
| Colour: | White | Hardness: | 4½ - 5 |
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| Name: | From the Greek for "away from" (ἀπό, apo) and "leaf" (φύλλον, phyllos), in allusion to the way it exfoliates upon heating. | ||
| Apophyllite-(KF), Apophyllite-(KOH), Apophyllite-(NaF) | |||
Classification of Apophyllite | ||||||||||||||||||||
| mindat.org URL: | http://www.mindat.org/min-283.html Please feel free to link to this page. | |||||||||||||||||||
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Physical Properties of Apophyllite | ||||||||||||||||||||
| Lustre: | Vitreous, Pearly | |||||||||||||||||||
| Colour: | White | |||||||||||||||||||
| Streak: | White | |||||||||||||||||||
| Hardness (Mohs): | 4½ - 5 | |||||||||||||||||||
| Density (measured): | 2.33 - 2.37 g/cm3 | |||||||||||||||||||
| Density (calculated): | 2.37 g/cm3 | |||||||||||||||||||
Crystallography of Apophyllite | ||||||||||||||||||||
| Crystal Atlas: | Image Loading
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Apophyllite no.4 - Goldschmidt (1913-1926)
Apophyllite no.5 - Goldschmidt (1913-1926)
Apophyllite no.6 - Goldschmidt (1913-1926)
Apophyllite no.18 - Goldschmidt (1913-1926)
Apophyllite no.51 - Goldschmidt (1913-1926)
Apophyllite no.98 - Goldschmidt (1913-1926) About Crystal AtlasYou may need to scroll this box using your mouse to view the full instructions.The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. You need Java to see these. You can download Java for free - click here to download Java The 3d models and java code are kindly provided by www.smorf.nl. You can control the movement of the models by holding down the left mouse-button over the 3d model and moving your mouse. Keyboard controls are:
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Optical Data of Apophyllite | ||||||||||||||||||||
| Type: | Uniaxial (+) | |||||||||||||||||||
| RI values: | nω = 1.535 nε = 1.537 | |||||||||||||||||||
| Maximum Birefringence: | δ = 0.002 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. | |||||||||||||||||||
| Surface Relief: | Low | |||||||||||||||||||
Other Names for Apophyllite | ||||||||||||||||||||
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| Varieties: |
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Other Information | ||||||||||||||||||||
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. | |||||||||||||||||||
References for Apophyllite | ||||||||||||||||||||
| Reference List: - + | Dunn, Pete J., R.C. Rouse & J.A. Norberg (1978), Hydroxyapophyllite, a new mineral and a redefinition of the apophyllite group: Am. Min.: 63: 196-202. | |||||||||||||||||||
Internet Links for Apophyllite | ||||||||||||||||||||
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| Specimens: | The following Apophyllite specimens are currently listed for sale on minfind.com. | |||||||||||||||||||
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Localities for Apophyllite | ||||||||||||||||||||
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