Willhendersonite from
Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

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Willhendersonite

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

Willhendersonite

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

Willhendersonite

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

Willhendersonite

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

Willhendersonite

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

Willhendersonite

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

Willhendersonite

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

Willhendersonite

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

Classification
Locality type:	Quarry
Species:	Willhendersonite
Formula:	KCa[Al₃Si₃O₁₂] · 5H₂O
Comments:	twinned aggregates of white crystals up to about 3 mm. Willhendersonite is often intergrown with radiating sprays of colorless phillipsite. Found with and formed after them are colorless spheres of thomsonite and white frosted but translucent anhedral apophyllite. Some specimens grow in vugs lined or partially lined with well-formed crystals of brown phlogopite.
Habit:	twinned aggregates with crystals in three different orientations, each with faces approximately perpendicular to each other.
Colour:	white
Confirmation
Validity:	Valid - Type Locality
Associated Minerals:
Associates:	Fluorapophyllite-(K) - Hydroxyapophyllite-(K) Series Phillipsite-Ca Phlogopite Thomsonite Subgroup
Associated Minerals Based on Photo Data:
Fluorophlogopite	7
Thomsonite-Ca	5
Fluorapatite	5
Phillipsite-Ca	4
Kalsilite	2
Clinopyroxene Subgroup	2
Magnetite	1
Phlogopite	1
Data
Mineral Data:	Click here to view Willhendersonite data
Locality Data:	Click here to view Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
Photo Gallery	View Gallery (28 photos)
Data Identifiers
Mindat Occurrence Record ID:	97461
Long-form Identifier:	1:3:97461:7
GUID (UUID V4):	0
Nearest other occurrences of Willhendersonite

35.6km (22.1 miles)	ⓘ Colle Fabbri, Spoleto, Perugia Province, Umbria, Italy
73.7km (45.8 miles)	ⓘ Cupaello Quarry, Santa Rufina, Rieti, Rieti Province, Lazio, Italy
References
Peacor, Donald R., Dunn, Pete J., Simmons, William B., Tillmanns, Ekkehart, Fischer, Reinhard X. (1984) Willhendersonite, a new zeolite isostructural with chabazite. American Mineralogist, 69 (1-2) 186-189 Stoppa, F., Sharygin, V. V., Cundari, A. (1997) New mineral data from the kamafugite-carbonatite association: The melilitolite from Pian di Celle, Italy. Mineralogy and Petrology, 61 (1) 27-45 doi:10.1007/bf01172476 Meli, R. (1997) Giacimenti da non dimenticare: i minerali delle vulcaniti di San Venanzo (Terni). Rivista Mineralogica Italiana, 21, 3 (3-1997), 269-275 Sharygin, Victor V., Pekov, Igor V., Zubkova, Natalia V., Khomyakov, Alexander P., Stoppa, Francesco, Pushcharovsky, Dmitry Yu. (2013) Umbrianite, K7Na2Ca2[Al3Si10O29]F2Cl2, a new mineral species from melilitolite of the Pian di Celle volcano, Umbria, Italy. European Journal of Mineralogy, 25 (4) 655-669 doi:10.1127/0935-1221/2013/0025-2306 Stoppa, F., Schiazza, M. (2014) Extreme chemical conditions of crystallisation of Umbrian Melilitolites and wealth of rare, late stage/hydrothermal minerals. Open Geosciences, 6 (4). doi:10.2478/s13533-012-0190-z

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Willhendersonite from Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy

Willhendersonite from
Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy