Database

• PIG

Experimentalists

• Hélène Salomon
• Emilie Chalmin-Aljanabi
• Claire Chanteraud
• Eva Fabro

Parent matter

Pigment Bordezac facies D (PIG_0160_D), hematite-rich vein

Level

from laboratory repository

Origins

natural terrestrial

Provider

Pigmenthothèque - EDYTEM

Provider reference code

Bordezac < 160 µm – Pig_0160_D_601 (2016-027)

Local reference code

Pig_0160_D601_Bordezac-inf160

Body name

Earth

Terrain type

mineral surface

Place

Road D51, SE Bordezac (Gard) , Occitanie , France

Coordinates

System

WGS84

Position type

point

Geolocation

Point	Latitude	Longitude	Altitude
#1	44.3104°	4.0761°

Comments

outcrop near the road

Preparation

sieved fraction

Method

crushed and sieved with a mesh of 160 µm

Storage condition

room temperature and conditions

Phase type

solid

Component type (group)

superficial deposit (chemical deposit)

Comments

Hydrothermal mineralization in an arkosic sandstone bank - Era: Mesozoic, Trias, Trias series, inferior (?) and middle trias level

Shape

very fine dark red-bordeaux powder

Texture

pulverulent

Type of porosity

particulate

Density

0.98 $\pm$ 0.08 $g.cm^{-3}$

Texture

compact

Grain density

0.98 $\pm$ 0.08 $g.cm^{-3}$

Grain sizes

Grains	Size min	Size max	Size median	Size width	Size mass fraction	Grain shape
#1	0.0 ${\mu}m$	160.0 ${\mu}m$			1.0	equant

Size distribution

possibly large fraction below 50-100 µm

Size method

sieving with mesh of 160 µm

Comments

density varies with the degree of settlement

Oxides

Formula	$SiO_{2}$	$Al_{2}O_{3}$	$Fe_{2}O_{3}$	$MnO$	$MgO$	$CaO$	$Na_{2}O$	$K_{2}O$	$TiO_{2}$	$P_{2}O_{5}$
Mass fraction (%)	13.56	6.73	74.79	0.083	0.34	0.07	0.015	1.96	0.18	0.14

Oxides comments

contain K (1.96% in oxide) and small impurity of P, Ti, Na, Ca, Mg, Mn (0.83% in oxides), fire loss: 2.3%

Number

5

Mode of mixing

homogeneous mixing

Materials

	Name	Arrangement	Mass (g)	Mass fraction	Abundance comments
	Quartz	grains embeded in a ferric matrix (hematite)		0.05	Assumed mass fraction = cross section fraction in raw material
	Muscovite	grains embeded in a ferric matrix (hematite)		0.04 $\pm$ 0.01	< 5%. Assumed mass fraction = cross section fraction in raw material
	Xenotime-(Y)	grains embeded in a ferric matrix (hematite)		0.01	<1%. Assumed mass fraction = cross section fraction in raw material
	Baryte	grains embeded in a ferric matrix (hematite)			< 1%. not detected with DRX
	Hematite	ferric matrix of hematite)			> 50%

Links

• Research Gate: Pigmentothèque

Publications

• Chalmin et al., 2021, Color Res. Appl., on-line, 1 - 21