Allanite-(Ce) from
Kingman Feldspar Mine (Kingman Feldspar Quarry), Wallapai Mining District, Cerbat Mountains, Mohave County, Arizona, USA
| Locality type: | Mine | |
| Classification | ||
|---|---|---|
| Species: | Allanite-(Ce) | |
| Formula: | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) | |
| Comments: | Allanite occurs associated with biotite as large pods of euhedral to subhedral, metamict and extensively fractured crystals in the wall zone of the pegmatite. The allanite is dark brown to black in color and is mildly radioactive. Pods reach over 0.4 m in length, with the largest one showing intergrowth with another pod. On all of the exposed surfaces, the allanite was coated with a red crust of oxidized iron. Within the allanites were small (0.3 cm) inclusions of thorogummite. Analyses presented by Brown (2010) show that the majority of allanites from here are Nd-rich allanite-(Ce), with a Nd/Ce ratio ranging from 0.6 to 0.85, but a very few analyses show a Nd/Ce ration between 0.9 and 1.1. Those with a Nd/Ce ratio higher than 1 are classified as allanite-(Nd). The only way to identify allanite-(Nd) is to perform a qualitative analysis on individual specimens. Assuming that Brown (2010) has used a representative selection, between 1% and 5% of the specimens should show the presence of allanite-(Nd). | |
| Habit: | euhedral to subhedral, metamict and extensively fractured crystals | |
| Colour: | dark brown to black | |
| Confirmation | ||
| Validity: | Believed Valid | |
| Associated Minerals: | ||
| Associates: | Allanite-(Nd) Thorogummite | |
| Associated Minerals Based on Photo Data: | ||
| Allanite-(Nd) | 4 | |
| Bastnäsite-(Ce) | 1 | |
| Data | ||
| Mineral Data: | Click here to view Allanite-(Ce) data | |
| Locality Data: | Click here to view Kingman Feldspar Mine (Kingman Feldspar Quarry), Wallapai Mining District, Cerbat Mountains, Mohave County, Arizona, USA | |
| Photo Gallery | View Gallery (10 photos) | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 187601 | |
| Long-form Identifier: | 1:3:187601:7 | |
| GUID (UUID V4): | 0 | |
| Nearest other occurrences of Allanite-(Ce) | ||
| 5.0km (3.1 miles) | ⓘConsolidated Feldspar Corporation claim (Consolidated Spar Mine), Stockton Hill Mining District, Wallapai Mining District, Mohave County, Arizona, USA | |
| 64.3km (39.9 miles) | ⓘIron Mountain, Lost Basin Mining District, Mohave County, Arizona, USA | |
| 66.3km (41.2 miles) | ⓘRare Metals Mine (Waldren Mining Company Mine), Aquarius Mountains, Mohave County, Arizona, USA | |
| 69.1km (43.0 miles) | ⓘFrank Kayser deposit, Bolo Creek, Aquarius Mountains, Mohave County, Arizona, USA | |
| 96.7km (60.1 miles) | ⓘSignal, Mohave County, Arizona, USA | |
| References | ||
Kingman Feldspar Mine, Wallapai Mining District, Cerbat Mountains, Mohave County, Arizona, USA