Phosphosiderite, Nsutite and Triplite
| ID | 447 | |
|---|---|---|
| Mineral |
Phosphosiderite
Nsutite Triplite |
|
| Location | Sítio do Castelo Mine - Folgosinho - Guarda - Portugal | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Phosphosiderite information at mindat.org View Nsutite information at mindat.org View Triplite information at mindat.org |
|
Mindat data
| ID | 3187 |
|---|---|
| Long ID | 1:1:3187:1 |
| Formula |
Fe3+(PO4) · 2H2O
|
| IMA Status |
0 1 |
| General Appearance | Crystalline aggregates. Crystals to 4 cm, but with a rough surface and stepped structure. |
| Occurrence | Alteration product of triphylite. |
| Other Occurrences | Alteration product of triphylite in granitic pegmatites, soils, replcement mineral in bones and shells. |
| Discovery Year | 1890 |
| Diapheny | Transparent,Translucent |
| Cleavage | On {010}, good; on {001}, indistinct. |
| Tenacity | brittle |
| Colour | Purple to reddish violet, rose-red, peachy-pink, brownish yellow, moss-green, colourless; rose to colourless in transmitted light. |
| Hardness (min) | 3.5 |
| Hardness (max) | 4.0 |
| About the name | Originally found by Alfred Lewis Oliver Legrand Des Cloizeaux in 1858, but designated "type I hureaulite". Named in 1890 by Willy Bruhns and Karl Heinrich Emil Georg Busz for its composition, being a PHOSPHate, and from the Greek σίδηρος "SIDERos" for iron. Alfred LaCroix introduced vilateite in 1910, while Duncan McConnel described clinobarrandite in 1940. Metastrengite was named by Palache, Berman, and Frondel in 1951 as the original phosphosiderite was described as a orthorhombic mineral. |
| Crystal System | Monoclinic |
| Cleavage Type | Distinct/Good |
| Fracture type | Irregular/Uneven |
| Morphology | Crystals tabular {010} or stout prismatic [001]. Also occurs as botryoidal or reniform masses and crusts with a radial-fibrous structure. Forms include {001}, {100}, {010}, {101}, {110}, {210}, {410}, {710}, {111}, {771}, {011}, {034}, {041}. |
| Twinning | On {101}, commonly as interpenetration twins. |
| Thermal Behaviour | Becomes yellow and opaque when heated in a glass tube and gives off water without decrepitating. Fuses easily to form a black magnetic ball. |
| Publication Year | 1890 |
| shortcode_ima | Phsd |
| Group | Metavariscite Group |
| ID | 2940 |
|---|---|
| Long ID | 1:1:2940:3 |
| Formula |
Mn2+xMn4+1-xO2-2x(OH)2x
|
| IMA Status |
0 |
| Discovery Year | 1962 |
| Colour | grey-black to black |
| Hardness (min) | 6.5 |
| Hardness (max) | 8.0 |
| About the name | Named for the Nsuta mine, Ghana, the type locality. It is pronounced en-soo'-tite. |
| Streak | grey-black |
| Crystal System | Hexagonal |
| Cleavage Type | None Observed |
| Publication Year | 1962 |
| shortcode_ima | Nsu |
| Group | Ramsdellite Group |
| ID | 4021 |
|---|---|
| Long ID | 1:1:4021:7 |
| Formula |
Mn2+2(PO4)F
|
| IMA Status |
0 1 |
| Other Occurrences | Granitic pegmatites of the complex, phosphate-rich type. Also occurs in high-temperature veins (Nevada). |
| Discovery Year | 1813 |
| Diapheny | Transparent,Translucent |
| Cleavage | On {001}, good; on {010}, fair; and on {100}, poor. |
| Tenacity | brittle |
| Colour | Brown, red-brown, dark brown, black (altered); light brownish-yellow to dark reddish brown in transmitted light. |
| Hardness (min) | 5.0 |
| Hardness (max) | 5.5 |
| About the name | From the Greek τριπλόος, "triplos", three-fold, alluding to its three prominent cleavages. |
| Streak | White to brown |
| Crystal System | Monoclinic |
| Cleavage Type | Distinct/Good |
| Fracture type | Irregular/Uneven,Sub-Conchoidal |
| Morphology | Crystals are rare, commonly crude, and incompletely developed. Usually massive. |
| UV | Not fluorescent in UV. |
| Thermal Behaviour | Before the blowpipe, fuses easily at 1.5 to a black magnetic globule. When moistened with sulphuric acid, it colors the flame bluish green. With borax in oxidizing flame, gives a purple colored glass, indicating manganese. In a reducing flame, gives a strong reaction for iron. With soda, reacts for manganese. |
| shortcode_ima | Trl |
| Group | Triplite Group |
Details
Price: € 10
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| F | Fluorine |
|
| Fe | Iron | |
| H | Hydrogen | |
| Mn | Manganese | |
| O | Oxygen | |
| P | Phosphorus |
|