Where it forms, where it's found
- Geological setting
In bat guano
- Type locality
- 125 foot level
- Rowley Mine
- Theba
- Painted Rock Mining District
- Painted Rock Mountains
- Maricopa County
- Arizona
- USA
33.0492°, -113.0330°
2recorded occurrences
Physical
Optical
- Notes
Complete optical determinations were impossible because of the minute size of the crystals; however, the average index of refraction is very close to 1.580 because crystals are virtually invisible in all orientations in the 1.580 immersion liquid.
Crystallography
- Space group
- P21
- Cell parameters
- a = 8.796(16) Å · b = 5.457(16) Å · c = 8.960(16) Å
- Cell angles
- β = 90.34(6) °
- Ratio a:b:c
- 1 : 0.620 : 1.019
- Z
- 4
- Twinning
Synthetic crystals are reported to exhibit both racemic and rotational twinning
- Type-locality form
prisms or blades, up to about 10 x 3 x 2 μm, in parallel growth forming ribs with serrated edges epitactic on ebnerite prisms or forming epimorphs after ebnerite
Crystal structure
Chemical composition
Synonyms
- Epiebneriet
In other languages
- German
- Epiebnerit
Classification
Strunz
10th ed.8.AC
- 8Phosphates, Arsenates, VanadatesClass
- 8.APhosphates, etc. without additional anions, without H2ODivision
- 8.ACWith medium-sized and large cationsGroup
- 8.ACEpiebneriteSpecies
Group, growth & confusion
Literature, links & citation
Citations
- 2023Bosi, Ferdinando, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2023) Newsletter 76. Mineralogical Magazine, 1-5 doi:10.1180/mgm.2023.89 DOI: 10.1180/mgm.2023.89
- 2024Kampf, Anthony R.; Gu, Xiangping; Yang, Hexiong; Ma, Chi; Marty, Joe (2024) Ebnerite and epiebnerite: NH4ZnPO4 dimorphs with zeolite-type frameworks from the Rowley mine, Arizona, USA. Mineralogical Magazine, 88 (3). 312-318 doi:10.1180/mgm.2024.15DOI: 10.1180/mgm.2024.15
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Epiebnerite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/epiebnerite-470939},
note = {Accessed 2026-05-11}
}