Heterosite and Frondelite
| ID | 122 | |
|---|---|---|
| Mineral |
Heterosite
Frondelite |
|
| Location | Kivu - Democratic Republic of the Congo | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Heterosite information at mindat.org View Frondelite information at mindat.org |
|
Mindat data
| ID | 1887 |
|---|---|
| Long ID | 1:1:1887:2 |
| Formula |
Fe3+(PO4)
|
| IMA Status |
0 1 |
| Occurrence | Granite pegmatite. |
| Other Occurrences | Secondary mineral in complex granitic pegmatites replacing triphylite. |
| Discovery Year | 1825 |
| Diapheny | Opaque |
| Cleavage | On {100}, good; on {010} imperfect. Cleavage surfaces curved or crinkled at times. |
| Tenacity | brittle |
| Colour | Untreated mineral is usually Purple Black, also Deep rose to reddish purple, especially when treated in a strong acid solution. |
| Hardness (min) | 4.0 |
| Hardness (max) | 4.5 |
| About the name | Named in 1826 by François Alluaud (II) from the Greek έτερος for "another", probably in allusion to the species being the second new mineral containing iron and manganese from the same locality. |
| Streak | Pale purple |
| Crystal System | Orthorhombic |
| Cleavage Type | Distinct/Good |
| Fracture type | Irregular/Uneven |
| Morphology | Cleavable blocky masses |
| UV | Not Fluorescent |
| Comment Luster | Satiny on fresh fracture surfaces; dull when altered on surface. |
| Publication Year | 1825 |
| shortcode_ima | Het |
| Group | Triphylite Group |
| ID | 1614 |
|---|---|
| Long ID | 1:1:1614:4 |
| Formula |
(Mn2+0.5Fe3+0.5)2Fe3+3(PO4)3(OH)5
|
| IMA Status |
0 1 |
| General Appearance | Crusts and as botryoidal and drusy masses, showing in cross section a radiating fibrous structure. |
| Occurrence | Granitic pegmatite |
| Other Occurrences | Granitic pegmatites. |
| Discovery Year | 1949 |
| Diapheny | Translucent |
| Cleavage | On {100}, excellent; on {010}, good; on {001}, fair. |
| Tenacity | brittle |
| Colour | Dark brown, ocher-yellow, red-brown, greenish black, greenish brown, black; rarely orange |
| Hardness (min) | 4.5 |
| Hardness (max) | 4.5 |
| About the name | Named in 1949 by Marie Louise Lindberg (later Smith) in honor of Clifford Frondel (January 8, 1907 Brooklyn, New York, New York, USA - November 12, 2002 Winchester, Massachusetts, USA), American mineralogist, Professor of Mineralogy, Harvard University, Cambridge, Massachusetts, USA. The mineral cliffordite is also named in his honor. |
| Streak | Green (unoxidized), brown (oxidized) |
| Crystal System | Orthorhombic |
| Cleavage Type | Very Good |
| Fracture type | Irregular/Uneven,Splintery,Fibrous |
| Morphology | Euhedral crystals rare. Crystals exhibit {100}, {010}, {110}, and {101}. Typically fibrous, elongated along [001]; radiating, in crusts, botyroidal and drusy masses. |
| UV | Not Fluorescent in UV |
| Publication Year | 1949 |
| shortcode_ima | Fnd |
| Group | Rockbridgeite Group |
Details
Price: € 10
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| Fe | Iron | |
| H | Hydrogen | |
| Mn | Manganese | |
| O | Oxygen | |
| P | Phosphorus |
|